Upgrade Docker golang 1.23 > 1.24

BREAKING: Migrate opendtu to opendtu_address
Add authentication capability for locked-down opendtu's.
Updated setup examples with new variables.

.gitea/workflows/docker.yml

@@ -51,6 +51,6 @@ jobs:
           push: ${{ gitea.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: linux/arm64,linux/amd64
+          platforms: linux/arm64, linux/amd64, linux/riscv64, linux/arm/v7, linux/arm/v6, linux/386, linux/mips64
       - name: Cleanup old images
         run: docker system prune -f

.gitea/workflows/go.yml

@@ -11,6 +11,7 @@ on:
 
 jobs:
   release:
+    if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-docker
     steps:
       - name: Check out repository code
@@ -21,48 +22,29 @@ jobs:
           go-version: '>=1.22'
           cache: false
       - name: release-build-linux-amd64
-        run: GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-linux-amd64
+        run: GOOS=linux GOARCH=amd64 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-linux-amd64
+      - name: release-build-linux-386
+        run: GOOS=linux GOARCH=386 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-linux-386
       - name: release-build-linux-arm64
-        run: GOOS=linux GOARCH=arm64 go build -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-linux-arm64
-      - name: release-build-windows-amd64
-        run: GOOS=windows GOARCH=amd64 go build -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-windows-amd64.exe
-      - name: release-build-windows-arm64
-        run: GOOS=windows GOARCH=arm64 go build -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-windows-arm64.exe
-      - name: release-build-darwin-amd64
-        run: GOOS=darwin GOARCH=amd64 go build -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-darwin-amd64
-      - name: release-build-darwin-arm64
-        run: GOOS=darwin GOARCH=arm64 go build -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-darwin-arm64
+        run: GOOS=linux GOARCH=arm64 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-linux-arm64
+      - name: release-build-linux-arm
+        run: GOOS=linux GOARCH=arm go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-linux-arm
+      - name: release-build-linux-riscv64
+        run: GOOS=linux GOARCH=riscv64 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-linux-riscv64
 
-      - name: Use Go Action  
-        id: use-go-action
+      - name: release-build-windows-amd64
+        run: GOOS=windows GOARCH=amd64 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-windows-amd64.exe
+      - name: release-build-windows-arm64
+        run: GOOS=windows GOARCH=arm64 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-windows-arm64.exe
+
+      - name: release-build-darwin-amd64
+        run: GOOS=darwin GOARCH=amd64 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-darwin-amd64
+      - name: release-build-darwin-arm64
+        run: GOOS=darwin GOARCH=arm64 go build -v -ldflags="-s -w -X 'main.Version=${{  github.ref_name }}'" -o bin/opendtu-logger-${{  github.ref_name }}-darwin-arm64
+
+      - name: Create release 
         uses: https://gitea.com/actions/release-action@main
         with:
           files: |-
             bin/**            
           api_key: '${{secrets.RELEASE_TOKEN}}'
-
-      # - name: Create Release
-      #   id: create_release
-      #   env:
-      #     GITEA_TOKEN: ${{ secrets.CI_PACKAGES_RW }}
-      #   run: |
-      #     RESPONSE=$(curl -s -X POST -H "Content-Type: application/json" -H "Authorization: token ${GITEA_TOKEN}" \
-      #       -d '{
-      #         "tag_name": "${{ github.ref_name }}",
-      #         "target_commitish": "main",
-      #         "name": "Release ${{ github.ref_name }}",
-      #         "body": "Description of the release",
-      #         "draft": false,
-      #         "prerelease": false
-      #       }' \
-      #       "https://git.hollander.online/api/v1/repos/${{ gitea.repository_owner }}/${{ gitea.event.repository.name }}/releases")
-      #     echo "::set-output name=id::$(echo $RESPONSE | jq .id)"
-
-      # - name: Upload Assets
-      #   env:
-      #     GITEA_TOKEN: ${{ secrets.CI_PACKAGES_RW }}
-      #   run: |
-      #     for BINARY in bin/*; do
-      #       curl -X POST -H "Authorization: token ${GITEA_TOKEN}" -H "Content-Type: application/octet-stream" --data-binary "@$BINARY" \
-      #         "https://git.hollander.online/api/v1/repos/${{ gitea.repository_owner }}/${{ gitea.event.repository.name }}/releases/${{ steps.create_release.outputs.id }}/assets?name=$(basename $BINARY)"
-      #     done

.gitignore

@@ -72,3 +72,4 @@ docs
 
 # Don't include compiled binary
 main
+opendtu-logger

Dockerfile

@@ -1,5 +1,5 @@
 # Use buildx for multi-architecture support
-FROM --platform=${BUILDPLATFORM} golang:1.21 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.24 AS builder
 
 WORKDIR /app
 
@@ -11,7 +11,10 @@ RUN go mod download
 COPY . .
 
 # Build the application for the specified target architecture
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=${TARGETARCH} go build -o opendtu-logger .
+# https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/
+# Declare TARGETOS and TARGETARCH in the local scope so they can be used in the build stage.
+ARG TARGETOS TARGETARCH
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o opendtu-logger .
 
 # Create a minimal runtime image
 FROM --platform=${TARGETPLATFORM} scratch

LICENSE.md

@@ -0,0 +1,235 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
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+A patent license is "discriminatory" if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License.  You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License.  If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the Program, your modified version must prominently offer all users interacting with it remotely through a computer network (if your version supports such interaction) an opportunity to receive the Corresponding Source of your version by providing access to the Corresponding Source from a network server at no charge, through some standard or customary means of facilitating copying of software.  This Corresponding Source shall include the Corresponding Source for any work covered by version 3 of the GNU General Public License that is incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU General Public License into a single combined work, and to convey the resulting work.  The terms of this License will continue to apply to the part which is the covered work, but the work with which it is combined will remain governed by version 3 of the GNU General Public License.
+
+14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions of the GNU Affero General Public License from time to time.  Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program specifies that a certain numbered version of the GNU Affero General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation.  If the Program does not specify a version number of the GNU Affero General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU Affero General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions.  However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
+
+15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program.  It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found.
+
+     opendtu-logger
+     Copyright (C) 2024 Pieter Hollander
+
+     This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If your software can interact with users remotely through a computer network, you should also make sure that it provides a way for users to get its source.  For example, if your program is a web application, its interface could display a "Source" link that leads users to an archive of the code.  There are many ways you could offer source, and different solutions will be better for different programs; see section 13 for the specific requirements.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU AGPL, see <http://www.gnu.org/licenses/>.

README.md

@@ -1,14 +1,191 @@
 # OpenDTU logger
 
-OpenDTU logger connects to the OpenDTU livedata websocket and captures metrics.
-These metrics are inserted into a PostgreSQL database.
-Optionally, TimescaleDB can be used for better performance.
+OpenDTU logger adds detailed, long-term storage and visualisation of Hoymiles solar inverter metrics monitored with OpenDTU:
+
+- It  connects to the OpenDTU livedata websocket and captures metrics.
+- These metrics are inserted into a PostgreSQL database. Optionally, TimescaleDB can be used.
+- Included in OpenDTU Logger are a number of Grafana dashboards, which can be used to provide useful visualisations and insights.
+  - The image below shows the PV dashboard of a given day in dark mode. Light mode is also supported. Hovering over the graphs will result in a tooltip, providing the exact values recorded at a given time.
+
+![PV dashboard in dark mode](https://git.hollander.online/energy/opendtu-logger/raw/commit/a3debb78665641fe7101555d85df89eb0f0d2a79/screenshots/PV-overview-dark-mode.png)
+
+## OpenDTU logger installation instructions
+
+OpenDTU logger can be installed in different ways:
+
+1. Using the [Home Assistant add-on repository](https://git.hollander.online/energy/home-assistant-addons).
+2. Using [Docker Compose](#docker-compose)
+3. Using the binary available on the [releases page](https://git.hollander.online/energy/opendtu-logger/releases)
+4. Compiling the code yourself.
+
+Using the Home Assistant add-on or Docker Compose is the preferred way to install OpenDTU Logger.
+
+Installation on Home Assistant can be done by adding the [Home Assistant add-on repository](https://git.hollander.online/energy/home-assistant-addons) to the Home Assistant add-on store and following the instructions provided. Other installation methods are described below.
+
+### Configuring OpenDTU
+
+In order for OpenDTU Logger to work properly, it is required to ensure the following OpenDTU settings are used.
+OpenDTU Logger 0.1.4 has been tested with OpenDTU versions v24.6.10 - v25.2.3.
+
+- Within OpenDTU, go to `Settings` -> `Inverter settings` (<http://YOUR_OPENDTU_IP_ADDRESS/settings/inverter>).
+- For each inverter in the inverter list, click on the pencil (Edit inverter) and go to `Advanced`.
+- Enable `Zero daily yield at midnight` and `Clear Eventlog at midnight`.
+- Click `Save`
+- Repeat this procedure for every inverter.
+
+
+### Docker Compose
+
+The `docker` folder in this [repository](https://git.hollander.online/energy/opendtu-logger) contains example Docker compose files. The `compose.with-database-grafana.yml` file contains a full setup suitable for a standalone deployment. The other compose files are aimed at integration into existing environments.
+
+To use the standalone deployment, take the following steps
+
+Enter the `docker` folder
+
+```sh
+cd docker
+```
+
+Copy `example.with-database.env` to `.env`. E.g.:
+
+```sh
+cp example.with-database.env .env
+```
+
+In the `.env` file:
+
+- Edit the `REMOTE_URL` to point to your OpenDTU.
+- In `DB_URL` alter the `password` field. Set the same value in. `PG_PASSWORD`
+
+Deploy the Docker containers by running the following command from the `docker` folder.
+
+```sh
+docker compose -f compose.with-database-grafana.yml up
+```
+
+Docker should now start downloading the required containers and bring up OpenDTU Logger, TimescaleDB and Grafana. If everything seems ok, press `CTRL + C` to stop the containers. Next, execute
+
+```sh
+docker compose -f compose.with-database-grafana.yml up -d
+```
+
+The `-d` flag ensures that the containers are started in the background, so you can safely close your terminal window. If desired, containers running in the background can be stopped by running compose again with the `down` command.
+
+```sh
+docker compose -f compose.with-database-grafana.yml down
+```
+
+#### Setting up Grafana
+
+After deploying OpenDTU Logger with Docker Compose, Grafana should be available at <http://localhost:3000>.
+
+The initial login username and password are `admin:admin`. After the initial login, Grafana will request you to change the password to something more secure.
+
+##### Configuring the OpenDTU Logger data source
+
+After logging in, go to `Connections` -> `Data sources` -> `Add new data source`.
+
+- Under `SQL` select `PostgreSQL`.
+- Change the following fields
+  - `Host URL`: `timescaledb:5432`
+  - `Database name`: `opendtu_logger`
+  - `Username`: `postgres`
+  - `Password`: The password you set in the `.env.` file in the previous step.
+  - `TLS/SSL Mode`: `disable`
+  - `TimescaleDB`: set the slider to `enable`
+- Click `Save and test`
+  - You should get a green box with a `Database Connection OK` message.
+
+##### Adding the OpenDTU Logger dashboards
+
+Now that the data source has been configured, we can add our dashboards.
+
+- Go to `Dashboards` -> `New` -> `Import`.
+- Upload `PV.json` from the `grafana` folder in this [repository](https://git.hollander.online/energy/opendtu-logger)
+- After uploading, Grafana requests you to configure a data source. Select the data source configured in the previous step. Click `Import`. The dashboard should now be ready.
+- If you want more dashboards, import the other dashboards from the `grafana` folder as well, or create your own.
+
+### Binary
+
+Go to the [releases page](https://git.hollander.online/energy/opendtu-logger/releases) and download the most recent stable release.
+
+#### Running the binary as local user
+
+```sh
+REMOTE_URL="opendtu:80" DB_URL="host=localhost port=5432 user=postgres password=secret dbname=dtu sslmode=disable" TIMESCALEDB_ENABLED="true" TZ="Europe/Amsterdam" ./opendtu-logger
+```
+
+#### Creating a more permanent setup on Linux using systemd
+
+```sh
+sudo adduser --system --group --disabled-login --home /opt/opendtu-logger opendtu-logger
+
+sudo mkdir /opt/opendtu-logger
+sudo mkdir /opt/opendtu-logger/data
+sudo mv ./opendtu-logger /opt/opendtu-logger/
+
+sudo chown -R opendtu-logger:opendtu-logger /opt/opendtu-logger
+```
+
+```sh
+sudo nano /etc/systemd/system/opendtu-logger.service
+```
+
+Add the contents of `systemd/opendtu-logger.service` and alter the `REMOTE_URL` and `DB_URL` environment variables to match your setup.
+
+### PostgreSQL setup
+
+To install PostgreSQL on Debian / Ubuntu run
+
+```sh
+sudo apt install postgresql
+```
+
+The OpenDTU logger logs to a PostgreSQL database and optionally supports TimescaleDB. Create a separate database and user using the following commands.
+
+```sql
+CREATE DATABASE opendtu_logger;
+CREATE USER opendtu_logger WITH password 'SECRET';
+GRANT ALL privileges ON DATABASE opendtu_logger TO opendtu_logger;
+GRANT ALL ON SCHEMA public TO opendtu_logger;
+```
+
+Optional: enable the TimescaleDB extension. To make use of TimescaleDB, follow the steps outlined in [their documentation](https://docs.timescale.com/self-hosted/latest/install/installation-linux/). Then, enable TimescaleDB support for the `opendtu_logger` database by executing the following commands
+
+```sql
+\c opendtu_logger
+CREATE EXTENSION OF NOT EXISTS timescaledb;
+```
 
 ## Environment variables
 
+The following environment variables are required for OpenDTU Logger to be configured.
+
 ```conf
 REMOTE_URL="opendtu:80"
 DB_URL="host=localhost port=5432 user=postgres password=secret dbname=dtu sslmode=disable"
 TIMESCALEDB_ENABLED="true"
 TZ="Europe/Amsterdam"
 ```
+
+- `REMOTE_URL`is used to specify the IP address or hostname OpenDTU is running on. E.g.: `192.168.1.6` or `opendtu.internal`
+- `DB_URL` specifies the credentials required to connect to the PostgreSQL database. All [connection parameters documented by golang's `lib/pq` package](https://pkg.go.dev/github.com/lib/pq#hdr-Connection_String_Parameters) can be used.
+- `TIMESCALEDB_ENABLED` should be set to `true` or `false`.
+- `TZ` is used to ensure data is recorded with the right timestamp. Choose the timezone valid for your location from [this Wikipedia page](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).
+
+## Grafana dashboards
+
+The `grafana` folder contains example dashboards which can be imported into existing Grafana installs, or into the provided Docker Compose with Grafana setup.
+
+- The `opendtu_` dashboards contain visualisations for each table the OpenDTU logger records to.
+- `PV.json` is a dashboard which combines the visualisations of each table that I found to be most useful.
+- `Zonnepanelen.json` is the same as `PV.json`, but in Dutch language.
+
+## Known limitations
+
+- The logger currently assumes that events reported by OpenDTU occurred on the current day. This works for the majority of users, as the inverters reset every night when the sun goes down and OpenDTU is configured to forget old events data at midnight. For micro inverters with battery storage added to the PV input side, such as Zendure or Anker Solix, checks still need to be added to account for the fact that these inverters don't necessarily reset every night. Event recording will work, but entries might be recorded multiple times. For more information, see also [this OpenDTU Github issue](https://github.com/tbnobody/OpenDTU/issues/1800).
+- Upon restart of the OpenDTU, the OpenDTU Logger binary needs to be restarted as well. When using the provided `compose.yml` files with Docker, or using the `systemd` service file when using the binary, this happens automatically.
+
+## Feedback
+
+If you'd like to provide feedback about this project, or in case you'd like to ask questions, please refer to [this page](https://pieterhollander.nl/author/pieter-hollander/) for contact information (e-mail, Github or LinkedIn), or use the [contact form](https://pieterhollander.nl/#contact) on my website. You can also respond by placing your remarks in [this discussion on Github](https://github.com/tbnobody/OpenDTU/discussions/1842).

docker/compose.with-database-grafana.yml

@@ -0,0 +1,69 @@
+version: '3.8'
+services:
+  timescaledb:
+    image: timescale/timescaledb:latest-pg16
+    restart: always
+    environment:
+      POSTGRES_USER: ${PG_USER}
+      POSTGRES_PASSWORD: ${PG_PASSWORD}
+      POSTGRES_DB: ${PG_DB}
+    ports:
+      - "5432:5432"
+    networks:
+      - internal
+    volumes:
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+      - opendtu_db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${PG_USER}"]
+      interval: 5s
+      timeout: 5s
+      retries: 20
+
+  opendtu-logger:
+    image: git.hollander.online/energy/opendtu-logger:latest
+    restart: always
+    environment:
+      DB_URL: ${DB_URL}
+      OPENDTU_ADDRESS: ${OPENDTU_ADDRESS}
+      OPENDTU_AUTH: ${OPENDTU_AUTH}
+      OPENDTU_USERNAME: ${OPENDTU_USERNAME}
+      OPENDTU_PASSWORD: ${OPENDTU_PASSWORD}
+      TIMESCALEDB_ENABLED: ${TIMESCALEDB_ENABLED}
+      TZ: ${TZ}
+      LOG_LEVEL: ${LOG_LEVEL}
+    depends_on:
+      timescaledb:
+        condition: service_healthy
+    networks:
+      - internal
+    volumes:
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+  grafana:
+    image: grafana/grafana:latest
+    container_name: grafana
+    restart: always
+    user: "1000:1000"
+    ports:
+      - "3000:3000"
+    networks:
+      - internal
+    volumes:
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+      - opendtu_logger_grafana:/var/lib/grafana:rw
+    environment:
+      GF_DATAPROXY_ROW_LIMIT: 5000000
+#      GF_LOG_FILTERS: rendering:debug
+    healthcheck:
+     test: ["CMD-SHELL", "curl -f localhost:3000/api/health && echo 'ready'"]
+     interval: 10s
+     retries: 30
+networks:
+  internal:
+    attachable: true
+volumes:
+  opendtu_logger_grafana:
+  opendtu_db:

docker/compose.with-database.yml

@@ -1,6 +1,7 @@
 version: '3.8'
 services:
   timescaledb:
+    restart: always
     image: timescale/timescaledb:latest-pg16
     environment:
       POSTGRES_USER: ${PG_USER}
@@ -21,12 +22,18 @@ services:
       retries: 20
 
   opendtu-logger:
-    image: git.hollander.online/energy/opendtu-logger:main
+    restart: always
+    image: git.hollander.online/energy/opendtu-logger:latest
     environment:
       DB_URL: ${DB_URL}
-      REMOTE_URL: ${REMOTE_URL}
+      OPENDTU_ADDRESS: ${OPENDTU_ADDRESS}
+      OPENDTU_AUTH: ${OPENDTU_AUTH}
+      OPENDTU_USERNAME: ${OPENDTU_USERNAME}
+      OPENDTU_PASSWORD: ${OPENDTU_PASSWORD}
       TIMESCALEDB_ENABLED: ${TIMESCALEDB_ENABLED}
       TZ: ${TZ}
+      LOG_LEVEL: ${LOG_LEVEL}
+
     depends_on:
       timescaledb:
         condition: service_healthy

docker/compose.yml

@@ -1,12 +1,17 @@
 version: '3.8'
 services:
   opendtu-logger:
-    image: git.hollander.online/energy/opendtu-logger:main
+    restart: always
+    image: git.hollander.online/energy/opendtu-logger:latest
     environment:
       DB_URL: ${DB_URL}
-      REMOTE_URL: ${REMOTE_URL}
+      OPENDTU_ADDRESS: ${OPENDTU_ADDRESS}
+      OPENDTU_AUTH: ${OPENDTU_AUTH}
+      OPENDTU_USERNAME: ${OPENDTU_USERNAME}
+      OPENDTU_PASSWORD: ${OPENDTU_PASSWORD}
       TIMESCALEDB_ENABLED: ${TIMESCALEDB_ENABLED}
       TZ: ${TZ}
+      LOG_LEVEL: ${LOG_LEVEL}
     depends_on:
       timescaledb:
         condition: service_healthy

docker/example.env

@@ -0,0 +1,11 @@
+# OpenDTU
+OPENDTU_ADDRESS="192.168.1.89:80"
+OPENDTU_AUTH=false
+OPENDTU_USERNAME=admin
+OPENDTU_PASSWORD=
+
+# OpenDTU Logger
+DB_URL="host=timescaledb port=5432 user=postgres password=secret dbname=opendtu_logger sslmode=disable"
+TIMESCALEDB_ENABLED=true
+TZ="Europe/Amsterdam"
+LOG_LEVEL=INFO"

docker/example.with-database.env

@@ -1,7 +1,16 @@
-REMOTE_URL="opendtu:80"
-DB_URL="host=timescaledb port=5432 user=postgres password=secret dbname=dtu sslmode=disable"
+# OpenDTU
+OPENDTU_ADDRESS="192.168.1.89:80"
+OPENDTU_AUTH=false
+OPENDTU_USERNAME=admin
+OPENDTU_PASSWORD=
+
+# OpenDTU Logger
+DB_URL="host=timescaledb port=5432 user=postgres password=secret dbname=opendtu_logger sslmode=disable"
 TIMESCALEDB_ENABLED=true
 TZ="Europe/Amsterdam"
-PG_USER=
+LOG_LEVEL=INFO"
+
+# Database configuration
+PG_USER=postgres
 PG_PASSWORD=
-PG_DB=
+PG_DB=opendtu_logger

go.mod

@@ -1,10 +1,16 @@
 module git.hollander.online/energy/opendtu-logger
 
-go 1.21.5
+go 1.24
 
 require (
-	github.com/gorilla/websocket v1.5.1
+	github.com/gorilla/websocket v1.5.3
 	github.com/lib/pq v1.10.9
+	github.com/pressly/goose/v3 v3.24.1
 )
 
-require golang.org/x/net v0.17.0 // indirect
+require (
+	github.com/mfridman/interpolate v0.0.2 // indirect
+	github.com/sethvargo/go-retry v0.3.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/sync v0.11.0 // indirect
+)

go.sum

@@ -1,6 +1,57 @@
-github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
-github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
+github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
-golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
-golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
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grafana/opendtu_events.json

@@ -0,0 +1,158 @@
+{
+  "__inputs": [
+    {
+      "name": "DS_ENERGY",
+      "label": "energy",
+      "description": "",
+      "type": "datasource",
+      "pluginId": "grafana-postgresql-datasource",
+      "pluginName": "PostgreSQL"
+    }
+  ],
+  "__elements": {},
+  "__requires": [
+    {
+      "type": "grafana",
+      "id": "grafana",
+      "name": "Grafana",
+      "version": "10.3.3"
+    },
+    {
+      "type": "datasource",
+      "id": "grafana-postgresql-datasource",
+      "name": "PostgreSQL",
+      "version": "1.0.0"
+    },
+    {
+      "type": "panel",
+      "id": "table",
+      "name": "Table",
+      "version": ""
+    }
+  ],
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": {
+          "type": "grafana",
+          "uid": "-- Grafana --"
+        },
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 0,
+  "id": null,
+  "links": [],
+  "liveNow": false,
+  "panels": [
+    {
+      "datasource": {
+        "type": "grafana-postgresql-datasource",
+        "uid": "${DS_ENERGY}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "custom": {
+            "align": "auto",
+            "cellOptions": {
+              "type": "auto"
+            },
+            "inspect": false
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unitScale": true
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 0
+      },
+      "id": 1,
+      "options": {
+        "cellHeight": "sm",
+        "footer": {
+          "countRows": false,
+          "fields": "",
+          "reducer": [
+            "sum"
+          ],
+          "show": false
+        },
+        "showHeader": true
+      },
+      "pluginVersion": "10.3.3",
+      "targets": [
+        {
+          "datasource": {
+            "type": "grafana-postgresql-datasource",
+            "uid": "${DS_ENERGY}"
+          },
+          "editorMode": "code",
+          "format": "table",
+          "rawQuery": true,
+          "rawSql": "SELECT\n  timestamp AS time,\n  inverter_serial,\n  message_id,\n  message,\n  start_time,\n  end_time\nFROM\n  opendtu_events\nORDER BY\n  timestamp DESC",
+          "refId": "A",
+          "sql": {
+            "columns": [
+              {
+                "parameters": [],
+                "type": "function"
+              }
+            ],
+            "groupBy": [
+              {
+                "property": {
+                  "type": "string"
+                },
+                "type": "groupBy"
+              }
+            ],
+            "limit": 50
+          }
+        }
+      ],
+      "title": "Panel Title",
+      "type": "table"
+    }
+  ],
+  "refresh": "5s",
+  "schemaVersion": 39,
+  "tags": [],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now/d",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "",
+  "title": "opendtu_events",
+  "uid": "be2896ae-7908-4fe6-a47f-f999afd71a29",
+  "version": 3,
+  "weekStart": ""
+}

grafana/opendtu_hints.json

@@ -0,0 +1,409 @@
+{
+  "__inputs": [
+    {
+      "name": "DS_ENERGY",
+      "label": "energy",
+      "description": "",
+      "type": "datasource",
+      "pluginId": "grafana-postgresql-datasource",
+      "pluginName": "PostgreSQL"
+    }
+  ],
+  "__elements": {},
+  "__requires": [
+    {
+      "type": "grafana",
+      "id": "grafana",
+      "name": "Grafana",
+      "version": "10.3.3"
+    },
+    {
+      "type": "datasource",
+      "id": "grafana-postgresql-datasource",
+      "name": "PostgreSQL",
+      "version": "1.0.0"
+    },
+    {
+      "type": "panel",
+      "id": "timeseries",
+      "name": "Time series",
+      "version": ""
+    }
+  ],
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": {
+          "type": "grafana",
+          "uid": "-- Grafana --"
+        },
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 0,
+  "id": null,
+  "links": [],
+  "liveNow": false,
+  "panels": [
+    {
+      "datasource": {
+        "type": "grafana-postgresql-datasource",
+        "uid": "${DS_ENERGY}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unitScale": true
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "id": 2,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "grafana-postgresql-datasource",
+            "uid": "${DS_ENERGY}"
+          },
+          "editorMode": "code",
+          "format": "table",
+          "rawQuery": true,
+          "rawSql": "SELECT\n  timestamp AS time,\n  radio_problem\nFROM\n  opendtu_hints\nWHERE\n  $__timeFilter(\"timestamp\")",
+          "refId": "A",
+          "sql": {
+            "columns": [
+              {
+                "parameters": [],
+                "type": "function"
+              }
+            ],
+            "groupBy": [
+              {
+                "property": {
+                  "type": "string"
+                },
+                "type": "groupBy"
+              }
+            ],
+            "limit": 50
+          }
+        }
+      ],
+      "title": "radio_problem",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "grafana-postgresql-datasource",
+        "uid": "${DS_ENERGY}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unitScale": true
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "id": 3,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "grafana-postgresql-datasource",
+            "uid": "${DS_ENERGY}"
+          },
+          "editorMode": "code",
+          "format": "table",
+          "rawQuery": true,
+          "rawSql": "SELECT\n  timestamp AS time,\n  default_password\nFROM\n  opendtu_hints \nWHERE\n  $__timeFilter(\"timestamp\")",
+          "refId": "A",
+          "sql": {
+            "columns": [
+              {
+                "parameters": [],
+                "type": "function"
+              }
+            ],
+            "groupBy": [
+              {
+                "property": {
+                  "type": "string"
+                },
+                "type": "groupBy"
+              }
+            ],
+            "limit": 50
+          }
+        }
+      ],
+      "title": "default_password",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "grafana-postgresql-datasource",
+        "uid": "${DS_ENERGY}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unitScale": true
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "id": 1,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "grafana-postgresql-datasource",
+            "uid": "${DS_ENERGY}"
+          },
+          "editorMode": "code",
+          "format": "table",
+          "rawQuery": true,
+          "rawSql": "SELECT\n  timestamp AS time,\n  time_sync\nFROM\n  opendtu_hints\nWHERE\n  $__timeFilter(\"timestamp\")",
+          "refId": "A",
+          "sql": {
+            "columns": [
+              {
+                "parameters": [],
+                "type": "function"
+              }
+            ],
+            "groupBy": [
+              {
+                "property": {
+                  "type": "string"
+                },
+                "type": "groupBy"
+              }
+            ],
+            "limit": 50
+          }
+        }
+      ],
+      "title": "time_sync",
+      "type": "timeseries"
+    }
+  ],
+  "refresh": "",
+  "schemaVersion": 39,
+  "tags": [],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now-6h",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "",
+  "title": "opendtu_hints",
+  "uid": "b4428c4f-2e7d-4171-a621-3615b5553dab",
+  "version": 3,
+  "weekStart": ""
+}

grafana/opendtu_inverters_ac.json

@@ -0,0 +1,829 @@
+{
+    "__inputs": [
+      {
+        "name": "DS_ENERGY",
+        "label": "energy",
+        "description": "",
+        "type": "datasource",
+        "pluginId": "grafana-postgresql-datasource",
+        "pluginName": "PostgreSQL"
+      }
+    ],
+    "__elements": {},
+    "__requires": [
+      {
+        "type": "grafana",
+        "id": "grafana",
+        "name": "Grafana",
+        "version": "10.3.3"
+      },
+      {
+        "type": "datasource",
+        "id": "grafana-postgresql-datasource",
+        "name": "PostgreSQL",
+        "version": "1.0.0"
+      },
+      {
+        "type": "panel",
+        "id": "timeseries",
+        "name": "Time series",
+        "version": ""
+      }
+    ],
+    "annotations": {
+      "list": [
+        {
+          "builtIn": 1,
+          "datasource": {
+            "type": "grafana",
+            "uid": "-- Grafana --"
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grafana/opendtu_inverters_dc.json

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grafana/opendtu_inverters_inv.json

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+                  ],
+                  "type": "function"
+                },
+                {
+                  "parameters": [
+                    {
+                      "name": "yieldday",
+                      "type": "functionParameter"
+                    }
+                  ],
+                  "type": "function"
+                }
+              ],
+              "groupBy": [
+                {
+                  "property": {
+                    "type": "string"
+                  },
+                  "type": "groupBy"
+                }
+              ],
+              "limit": 50
+            },
+            "table": "log"
+          }
+        ],
+        "title": "Log: yieldtotal",
+        "type": "timeseries"
+      },
+      {
+        "datasource": {
+          "type": "grafana-postgresql-datasource",
+          "uid": "${DS_ENERGY}"
+        },
+        "fieldConfig": {
+          "defaults": {
+            "color": {
+              "mode": "palette-classic"
+            },
+            "custom": {
+              "axisBorderShow": false,
+              "axisCenteredZero": false,
+              "axisColorMode": "text",
+              "axisLabel": "",
+              "axisPlacement": "auto",
+              "barAlignment": 0,
+              "drawStyle": "line",
+              "fillOpacity": 0,
+              "gradientMode": "none",
+              "hideFrom": {
+                "legend": false,
+                "tooltip": false,
+                "viz": false
+              },
+              "insertNulls": false,
+              "lineInterpolation": "linear",
+              "lineWidth": 1,
+              "pointSize": 5,
+              "scaleDistribution": {
+                "type": "linear"
+              },
+              "showPoints": "auto",
+              "spanNulls": false,
+              "stacking": {
+                "group": "A",
+                "mode": "none"
+              },
+              "thresholdsStyle": {
+                "mode": "off"
+              }
+            },
+            "mappings": [],
+            "thresholds": {
+              "mode": "absolute",
+              "steps": [
+                {
+                  "color": "green",
+                  "value": null
+                },
+                {
+                  "color": "red",
+                  "value": 80
+                }
+              ]
+            },
+            "unit": "watth",
+            "unitScale": true
+          },
+          "overrides": []
+        },
+        "gridPos": {
+          "h": 8,
+          "w": 12,
+          "x": 12,
+          "y": 7
+        },
+        "id": 2,
+        "options": {
+          "legend": {
+            "calcs": [
+              "logmin",
+              "max",
+              "mean",
+              "lastNotNull"
+            ],
+            "displayMode": "table",
+            "placement": "bottom",
+            "showLegend": true
+          },
+          "tooltip": {
+            "mode": "multi",
+            "sort": "none"
+          }
+        },
+        "pluginVersion": "10.3.3",
+        "targets": [
+          {
+            "datasource": {
+              "type": "grafana-postgresql-datasource",
+              "uid": "${DS_ENERGY}"
+            },
+            "editorMode": "code",
+            "format": "table",
+            "rawQuery": true,
+            "rawSql": "SELECT\n  timestamp AS time,\n  yieldday\nFROM\n  opendtu_log\nWHERE\n  $__timeFilter(\"timestamp\")",
+            "refId": "A",
+            "sql": {
+              "columns": [
+                {
+                  "parameters": [
+                    {
+                      "name": "\"timestamp\"",
+                      "type": "functionParameter"
+                    }
+                  ],
+                  "type": "function"
+                },
+                {
+                  "parameters": [
+                    {
+                      "name": "yieldday",
+                      "type": "functionParameter"
+                    }
+                  ],
+                  "type": "function"
+                }
+              ],
+              "groupBy": [
+                {
+                  "property": {
+                    "type": "string"
+                  },
+                  "type": "groupBy"
+                }
+              ],
+              "limit": 50
+            },
+            "table": "log"
+          }
+        ],
+        "title": "Log: yieldday",
+        "type": "timeseries"
+      }
+    ],
+    "refresh": "5s",
+    "schemaVersion": 39,
+    "tags": [],
+    "templating": {
+      "list": []
+    },
+    "time": {
+      "from": "now/d",
+      "to": "now"
+    },
+    "timepicker": {},
+    "timezone": "",
+    "title": "opendtu_log",
+    "uid": "a4db356f-1c05-41f0-b13b-4e4464eb9a1e",
+    "version": 13,
+    "weekStart": ""
+  }

main.go

@@ -1,26 +1,30 @@
 // TODO: Storage optimisation: Map inverter serial to shorter serial. Use that for referring.
-// TODO: Use username and password provided using Basic Authentication.
 // TODO: Record Inverter struct data only on-change.
 // Idea: Make a full admin / config GUI and only configure through this utility.
 // Idea: Gather settings only on start-up.
-// TODO: handleMessage: Support older data age than 0, due to new OpenDTU WebSocket implementation.
 // TODO: Only update meter readings such as yieldday, yieldtotal on-change.
-// TODO: DB migrations.
+// TODO: Add a health check endpoint, potentially log to it.
+// TODO: Add support for monitoring multiple OpenDTU's at once.
 package main
 
 import (
 	"database/sql"
+	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"io/fs"
 	"log"
 	"log/slog"
 	"net/http"
 	"os"
+	"strconv"
 	"time"
 	_ "time/tzdata"
 
+	"git.hollander.online/energy/opendtu-logger/migrations"
 	"github.com/gorilla/websocket"
 	_ "github.com/lib/pq"
+	"github.com/pressly/goose/v3"
 )
 
 // VUD contains three variables used for most metrics sent by OpenDTU:
@@ -104,10 +108,12 @@ type LiveData struct {
 
 // Events struct
 type Event struct {
-	MessageID int    `json:"message_id"`
-	Message   string `json:"message"`
-	StartTime int    `json:"start_time"`
-	EndTime   int    `json:"end_time"`
+	MessageID      int    `json:"message_id"`
+	Message        string `json:"message"`
+	StartTime      int    `json:"start_time"`
+	EndTime        int    `json:"end_time"`
+	StartTimestamp time.Time
+	EndTimestamp   time.Time
 }
 
 type EventsResponse struct {
@@ -142,14 +148,138 @@ type InverterSettingsData struct {
 	Inverters []InverterSettings `json:"inverter"`
 }
 
+// Config settings struct
+type Config struct {
+	DB              string `json:"db"`
+	OpenDTUAddress  string `json:"opendtu_address"`
+	OpenDTUAuth     bool   `json:"opendtu_auth"`
+	OpenDTUUser     string `json:"opendtu_username"`
+	OpenDTUPassword string `json:"opendtu_password"`
+	TimescaleDB     bool   `json:"timescaledb"`
+	TZ              string `json:"tz"`
+	LogLevel        string `json:"log_level"`
+}
+
 var logger = slog.New(slog.NewJSONHandler(os.Stdout, nil))
+var config Config
+
+// LoadConfig attempts to read the configuration from options.json
+// If it fails, it falls back to using environment variables
+func loadConfig() Config {
+	configFilePath := os.Getenv("CONFIG_FILE")
+	if configFilePath == "" {
+		configFilePath = "/data/options.json"
+	}
+
+	data, err := os.ReadFile(configFilePath)
+	if err == nil {
+		// Successfully read the file, parse the JSON
+		err = json.Unmarshal(data, &config)
+		if err != nil {
+			log.Fatalf("Error parsing config file: %v", err)
+		}
+		if config.DB == "" {
+			log.Fatal("db connection settings are not set")
+		}
+		if config.OpenDTUAddress == "" {
+			log.Fatal("opendtu_address is not set")
+		}
+		if config.OpenDTUAuth {
+			if config.OpenDTUUser == "" {
+				log.Fatal("opendtu_username is not set, while opendtu_auth is set to enabled. Set opendtu_auth to false or set username")
+			}
+			if config.OpenDTUPassword == "" {
+				log.Fatal("opendtu_password is not set, while opendtu_auth is set to enabled. Set opendtu_auth to false or set password")
+			}
+		}
+	} else {
+		logger.Info("JSON config file not found. Falling back to environment variables.")
+		// Fallback to environment variables
+		config.DB = os.Getenv("DB_URL")
+		if config.DB == "" {
+			log.Fatal("DB_URL environment variable is not set.")
+		}
+		config.OpenDTUAddress = os.Getenv("OPENDTU_ADDRESS")
+		if config.OpenDTUAddress == "" {
+			log.Fatal("OPENDTU_ADDRESS environment variable is not set.")
+		}
+
+		openDTUAuthStr := os.Getenv("OPENDTU_AUTH")
+		if openDTUAuthStr != "" {
+			openDTUAuth, err := strconv.ParseBool(openDTUAuthStr)
+			if err != nil {
+				log.Fatalf("Error parsing OPENDTU_AUTH: %v", err)
+			}
+			config.OpenDTUAuth = openDTUAuth
+		}
+		if config.OpenDTUAuth {
+			config.OpenDTUUser = os.Getenv("OPENDTU_USERNAME")
+			if config.OpenDTUUser == "" {
+				log.Fatal("OPENDTU_USERNAME environment variable is not set.")
+			}
+			config.OpenDTUPassword = os.Getenv("OPENDTU_PASSWORD")
+			if config.OpenDTUPassword == "" {
+				log.Fatal("OPENDTU_PASSWORD environment variable is not set.")
+			}
+
+		}
+
+		timescaleDBStr := os.Getenv("TIMESCALEDB_ENABLED")
+		if timescaleDBStr != "" {
+			timescaleDB, err := strconv.ParseBool(timescaleDBStr)
+			if err != nil {
+				log.Fatalf("Error parsing TIMESCALEDB_ENABLED: %v", err)
+			}
+			config.TimescaleDB = timescaleDB
+		}
+		config.TZ = os.Getenv("TZ")
+		config.LogLevel = os.Getenv("LOG_LEVEL")
+	}
+	_, err = time.LoadLocation(config.TZ)
+	if err != nil {
+		logger.Warn("invalid timezone")
+	}
+
+	return config
+}
+
+// Helper function to map environment variable to slog.Level
+func getLogLevel(defaultLevel slog.Level) slog.Level {
+	logLevelStr := config.LogLevel
+	switch logLevelStr {
+	case "DEBUG":
+		return slog.LevelDebug
+	case "INFO":
+		return slog.LevelInfo
+	case "WARN":
+		return slog.LevelWarn
+	case "ERROR":
+		return slog.LevelError
+	default:
+		return defaultLevel
+	}
+}
+
+// Function to create a new logger with a specified log level
+func createLoggerWithLevel(level slog.Level) *slog.Logger {
+	return slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		Level: level,
+	}))
+}
 
 // Main program
 func main() {
 	// Initial logger setup
 	slog.SetDefault(logger)
 
-	dbConnStr := (os.Getenv("DB_URL"))
+	// Load the configuration
+	config := loadConfig()
+
+	// Set the logLevel
+	logLevel := getLogLevel(slog.LevelInfo) // Default to info level
+	logger = createLoggerWithLevel(logLevel)
+
+	dbConnStr := config.DB
 	// Connect to PostgreSQL
 	db, err := sql.Open("postgres", dbConnStr)
 	if err != nil {
@@ -158,17 +288,21 @@ func main() {
 	defer db.Close()
 
 	// Create tables if they don't exist
-	createTables(db)
+	migrateDB(db)
 
-	// Get WebSocket URL from environment variable
-	RemoteURL := os.Getenv("REMOTE_URL")
-	wsURL := "ws://" + RemoteURL + "/livedata"
-	if wsURL == "" {
-		log.Fatal("WEBSOCKET_URL environment variable is not set.")
+	// Create WebSocket URL from config variable
+	wsURL := "ws://" + config.OpenDTUAddress + "/livedata"
+
+	logger.Debug(wsURL)
+
+	// Create headers with optional Basic Auth
+	headers := http.Header{}
+	if config.OpenDTUAuth {
+		headers.Set("Authorization", basicAuth(config.OpenDTUUser, config.OpenDTUPassword))
 	}
 
 	// Establish WebSocket connection
-	c, _, err := websocket.DefaultDialer.Dial(wsURL, nil)
+	c, _, err := websocket.DefaultDialer.Dial(wsURL, headers)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -179,6 +313,8 @@ func main() {
 		log.Fatal(err)
 	}
 
+	logger.Info("OpenDTU Logger has been successfully initialised. Starting data recording...")
+
 	// Start listening for WebSocket messages
 	go func() {
 		for {
@@ -212,7 +348,10 @@ func handleMessage(message []byte, db *sql.DB) {
 
 	// Check conditions for recording data
 	for _, inverter := range liveData.Inverters {
-		if inverter.Events > 0 && inverter.Events > getPreviousEventsCount(db, inverter.Serial) {
+		// Record events data
+		// Optional debugging code:
+		// log.Println("Events data:", "age", inverter.DataAge, "event number", inverter.Events, "previous event count", getPreviousEventsCount(db, inverter.Serial))
+		if inverter.DataAge == 0 && inverter.Events > 0 && inverter.Events > getPreviousEventsCount(db, inverter.Serial) {
 			// Query the endpoint for events
 			events, err := queryEventsEndpoint(inverter.Serial)
 			if err != nil {
@@ -220,10 +359,10 @@ func handleMessage(message []byte, db *sql.DB) {
 				continue
 			}
 
-			// Insert events data into the events table
+			// Insert events data into the opendtu_events table
 			insertEvents(db, inverter.Serial, events)
 		}
-
+		// Record inverter data
 		if inverter.DataAge == 0 && inverter.Reachable {
 			// Insert data into PostgreSQL tables
 			insertLiveData(db, inverter, liveData.Total, liveData.Hints)
@@ -232,120 +371,28 @@ func handleMessage(message []byte, db *sql.DB) {
 	}
 }
 
-func createTables(db *sql.DB) {
-	// Execute SQL statements to create tables if they don't exist
-	// inverter_serial is TEXT as some non-Hoymiles inverters use non-numeric serial numbers.
-	// An additional advantage is that it makes plotting in Grafana easier.
+func migrateDB(db *sql.DB) {
 	// TODO: Foreign keys commented out as TimescaleDB hypertables don't support them.
-	createTableSQL := `
-	CREATE TABLE IF NOT EXISTS dtu_log (
-		-- id SERIAL PRIMARY KEY,
-		timestamp TIMESTAMPTZ UNIQUE DEFAULT CURRENT_TIMESTAMP,
-		-- timestamp TIMESTAMPTZ,
-		power NUMERIC,
-		yieldday NUMERIC,
-		yieldtotal NUMERIC
-	);
 
-	CREATE TABLE IF NOT EXISTS inverters (
-		-- id SERIAL PRIMARY KEY,
-		timestamp TIMESTAMPTZ,
-		-- FOREIGN KEY (timestamp) REFERENCES dtu_log(timestamp),
-		inverter_serial TEXT,
-		name TEXT,
-		producing BOOL,
-		limit_relative NUMERIC,
-		limit_absolute NUMERIC
-	);
+	// Perform DB migrations
+	err := migrateFS(db, migrations.FS, ".")
 
-	CREATE TABLE IF NOT EXISTS inverters_ac (
-		-- id SERIAL PRIMARY KEY,
-		timestamp TIMESTAMPTZ,
-		-- FOREIGN KEY (timestamp) REFERENCES dtu_log(timestamp),
-		inverter_serial TEXT,
-		ac_number INT,
-		power NUMERIC,
-		voltage NUMERIC,
-		current NUMERIC,
-		frequency NUMERIC,
-		powerfactor NUMERIC,
-		reactivepower NUMERIC
-	);
-	
-	CREATE TABLE IF NOT EXISTS inverters_dc (
-		-- id SERIAL PRIMARY KEY,
-		timestamp TIMESTAMPTZ,
-		-- FOREIGN KEY (timestamp) REFERENCES dtu_log(timestamp),
-		inverter_serial TEXT,
-     	dc_number INT,
-		name TEXT,
-		power NUMERIC,
-		voltage NUMERIC,
-		current NUMERIC,
-		yieldday NUMERIC,
-		yieldtotal NUMERIC,
-		irradiation NUMERIC
-	);
-	
-	CREATE TABLE IF NOT EXISTS inverters_inv (
-		-- id SERIAL PRIMARY KEY,
-		timestamp TIMESTAMPTZ,
-		-- FOREIGN KEY (timestamp) REFERENCES dtu_log(timestamp),
-		inverter_serial TEXT,
-		temperature NUMERIC,
-		power_dc NUMERIC,
-		yieldday NUMERIC,
-		yieldtotal NUMERIC,
-		efficiency NUMERIC
-	);
-
-	CREATE TABLE IF NOT EXISTS events (
-		-- id SERIAL PRIMARY KEY,
-		timestamp TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
-		inverter_serial TEXT,
-		message_id INT,
-		message TEXT,
-		start_time INT,
-		end_time INT
-	);
-
-	CREATE TABLE IF NOT EXISTS dtu_hints (
-		-- id SERIAL PRIMARY KEY,
-		timestamp TIMESTAMPTZ,
-		-- FOREIGN KEY (timestamp) REFERENCES dtu_log(timestamp),
-		time_sync BOOL,
-		radio_problem BOOL,
-		default_password BOOL
-	);
-	
-	-- UNIQUE here doesn't work, as e.g. one timestamp may be valid for multiple string data.
-	CREATE INDEX IF NOT EXISTS dtu_log_timestamp_idx ON dtu_log (timestamp);
-	CREATE INDEX IF NOT EXISTS inverters_timestamp_idx ON inverters (timestamp);
-	CREATE INDEX IF NOT EXISTS inverters_ac_timestamp_idx ON inverters_ac (timestamp);
-	CREATE INDEX IF NOT EXISTS inverters_dc_timestamp_idx ON inverters_dc (timestamp);
-	CREATE INDEX IF NOT EXISTS inverters_inv_timestamp_idx ON inverters_inv (timestamp);
-	CREATE INDEX IF NOT EXISTS events_timestamp_idx ON events (timestamp);
-	CREATE INDEX IF NOT EXISTS dtu_hints_timestamp_idx ON dtu_hints (timestamp);
-
-	`
-
-	_, err := db.Exec(createTableSQL)
 	if err != nil {
-		log.Fatal("Error creating tables: ", err)
+		log.Fatal("Error performing database migrations: ", err)
 	}
-	timescaleEnabled := os.Getenv("TIMESCALEDB_ENABLED")
+	timescaleEnabled := config.TimescaleDB
 
 	enableTimescaleDB := `
 	-- CREATE EXTENSION IF NOT EXISTS timescaledb;
-	SELECT create_hypertable('dtu_log', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
-	SELECT create_hypertable('inverters', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
-	SELECT create_hypertable('inverters_ac', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
-	SELECT create_hypertable('inverters_dc', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
-	SELECT create_hypertable('inverters_inv', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
-	SELECT create_hypertable('events', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
-	SELECT create_hypertable('dtu_hints', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
+	SELECT create_hypertable('opendtu_log', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
+	SELECT create_hypertable('opendtu_inverters', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
+	SELECT create_hypertable('opendtu_inverters_ac', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
+	SELECT create_hypertable('opendtu_inverters_dc', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
+	SELECT create_hypertable('opendtu_inverters_inv', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
+	SELECT create_hypertable('opendtu_events', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
+	SELECT create_hypertable('opendtu_hints', 'timestamp', if_not_exists => TRUE, migrate_data => TRUE);
 	`
-	if timescaleEnabled == "true" {
+	if timescaleEnabled {
 		_, err := db.Exec(enableTimescaleDB)
 		if err != nil {
 			log.Fatal("Error enabling TimescaleDB: ", err)
@@ -354,13 +401,13 @@ func createTables(db *sql.DB) {
 }
 
 func insertLiveData(db *sql.DB, inverter Inverter, total Total, hints Hints) {
-	timeZone := os.Getenv("TZ")
+	timeZone := config.TZ
 	loc, _ := time.LoadLocation(timeZone)
 	timestamp := time.Now().In(loc)
 
 	// Insert data into log table
 	_, err := db.Exec(`
-		INSERT INTO dtu_log (timestamp, power, yieldday, yieldtotal)
+		INSERT INTO opendtu_log (timestamp, power, yieldday, yieldtotal)
 		VALUES ($1, $2, $3, $4);
 	`, timestamp, total.Power.V, total.YieldDay.V, total.YieldTotal.V)
 	if err != nil {
@@ -371,57 +418,57 @@ func insertLiveData(db *sql.DB, inverter Inverter, total Total, hints Hints) {
 	// Get the log ID of the inserted record
 	// NOT IN USE: TimescaleDB doesn't support it.
 	// var logID int
-	// err = db.QueryRow("SELECT id FROM dtu_log WHERE timestamp = $1", timestamp).Scan(&logID)
+	// err = db.QueryRow("SELECT id FROM opendtu_log WHERE timestamp = $1", timestamp).Scan(&logID)
 	// if err != nil {
-	// 	logger.Error("Error getting dtu_log ID", "error", err)
+	// 	logger.Error("Error getting opendtu_log ID", "error", err)
 	// 	return
 	// }
 
-	// Insert data into inverters table
+	// Insert data into opendtu_inverters table
 	_, err = db.Exec(`
-		INSERT INTO inverters (timestamp, inverter_serial, name, producing, limit_relative, limit_absolute)
+		INSERT INTO opendtu_inverters (timestamp, inverter_serial, name, producing, limit_relative, limit_absolute)
 		VALUES ($1, $2, $3, $4, $5, $6);
 	`, timestamp, inverter.Serial, inverter.Name, inverter.Producing, inverter.LimitRelative, inverter.LimitAbsolute)
 	if err != nil {
-		logger.Error("Error inserting into inverters table", "error", err)
+		logger.Error("Error inserting into opendtu_inverters table", "error", err)
 		return
 	}
 
-	// Insert data into inverters_ac table
+	// Insert data into opendtu_inverters_ac table
 	for acNumber, acData := range inverter.AC {
 		_, err := db.Exec(`
-			INSERT INTO inverters_ac (timestamp, inverter_serial, ac_number, power, voltage, current, frequency, powerfactor, reactivepower)
+			INSERT INTO opendtu_inverters_ac (timestamp, inverter_serial, ac_number, power, voltage, current, frequency, powerfactor, reactivepower)
 			VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9);
 		`, timestamp, inverter.Serial, acNumber, acData.Power.V, acData.Voltage.V, acData.Current.V, acData.Frequency.V, acData.PowerFactor.V, acData.ReactivePower.V)
 		if err != nil {
-			logger.Error("Error inserting into inverters_ac table for AC", "error", "acNumber", acNumber, err)
+			logger.Error("Error inserting into opendtu_inverters_ac table for AC", "error", "acNumber", acNumber, err)
 		}
 	}
 
-	// Insert data into inverters_dc table
+	// Insert data into opendtu_inverters_dc table
 	for dcNumber, dcData := range inverter.DC {
 		_, err := db.Exec(`
-			INSERT INTO inverters_dc (timestamp, inverter_serial, dc_number, name, power, voltage, current, yieldday, yieldtotal, irradiation)
+			INSERT INTO opendtu_inverters_dc (timestamp, inverter_serial, dc_number, name, power, voltage, current, yieldday, yieldtotal, irradiation)
 			VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);
 		`, timestamp, inverter.Serial, dcNumber, dcData.Name.U, dcData.Power.V, dcData.Voltage.V, dcData.Current.V, dcData.YieldDay.V, dcData.YieldTotal.V, dcData.Irradiation.V)
 		if err != nil {
-			log.Printf("Error inserting into inverters_dc table for DC %s: %v\n", dcNumber, err)
+			log.Printf("Error inserting into opendtu_inverters_dc table for DC %s: %v\n", dcNumber, err)
 		}
 	}
 
-	// Insert data into inverters_inv table
+	// Insert data into opendtu_inverters_inv table
 	for invNumber, invData := range inverter.INV {
 		_, err := db.Exec(`
-			INSERT INTO inverters_inv (timestamp, inverter_serial, temperature, efficiency, power_dc, yieldday, yieldtotal)
+			INSERT INTO opendtu_inverters_inv (timestamp, inverter_serial, temperature, efficiency, power_dc, yieldday, yieldtotal)
 			VALUES ($1, $2, $3, $4, $5, $6, $7);
 		`, timestamp, inverter.Serial, invData.Temperature.V, invData.Efficiency.V, invData.PowerDC.V, invData.YieldDay.V, invData.YieldTotal.V)
 		if err != nil {
-			log.Printf("Error inserting into inverters_inv table for INV %s: %v\n", invNumber, err)
+			log.Printf("Error inserting into opendtu_inverters_inv table for INV %s: %v\n", invNumber, err)
 		}
 	}
 	// Insert data into hints table
 	_, err = db.Exec(`
-		INSERT INTO dtu_hints (timestamp, time_sync, radio_problem, default_password)
+		INSERT INTO opendtu_hints (timestamp, time_sync, radio_problem, default_password)
 		VALUES ($1, $2, $3, $4);
 		`, timestamp, hints.TimeSync, hints.RadioProblem, hints.DefaultPassword)
 	if err != nil {
@@ -431,16 +478,60 @@ func insertLiveData(db *sql.DB, inverter Inverter, total Total, hints Hints) {
 
 }
 
-func queryEventsEndpoint(inverterSerial string) (*EventsResponse, error) {
-	remoteURL := os.Getenv("REMOTE_URL")
-	endpoint := fmt.Sprintf("http://"+remoteURL+"/api/eventlog/status?inv=%s", inverterSerial)
+func migrate(db *sql.DB, dir string) error {
+	err := goose.SetDialect("postgres")
+	if err != nil {
+		return fmt.Errorf("migrate: %w", err)
+	}
+	err = goose.Up(db, dir)
+	if err != nil {
+		return fmt.Errorf("migrate: %w", err)
+	}
+	return nil
 
-	resp, err := http.Get(endpoint)
+}
+
+func migrateFS(db *sql.DB, migrationFS fs.FS, dir string) error {
+	// In case the dir is an empty string, they probably meant the current directory and goose wants a period for that.
+	if dir == "" {
+		dir = "."
+	}
+	goose.SetBaseFS(migrationFS)
+	defer func() {
+		// Ensure that we remove the FS on the off chance some other part of our app uses goose for migrations and doesn't want to use our FS.
+		goose.SetBaseFS(nil)
+	}()
+	return migrate(db, dir)
+}
+
+func queryEventsEndpoint(inverterSerial string) (*EventsResponse, error) {
+	endpoint := fmt.Sprintf("http://"+config.OpenDTUAddress+"/api/eventlog/status?inv=%s", inverterSerial)
+
+	// Create a new HTTP request
+	req, err := http.NewRequest("GET", endpoint, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	if config.OpenDTUAuth {
+		// Add Basic Auth header
+		req.Header.Add("Authorization", basicAuth(config.OpenDTUUser, config.OpenDTUPassword))
+	}
+
+	// Send the request
+	client := &http.Client{}
+	resp, err := client.Do(req)
 	if err != nil {
 		return nil, err
 	}
 	defer resp.Body.Close()
 
+	// Check for HTTP errors
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("HTTP request failed with status: %s", resp.Status)
+	}
+
+	// Decode the response
 	var eventsResponse EventsResponse
 	if err := json.NewDecoder(resp.Body).Decode(&eventsResponse); err != nil {
 		return nil, err
@@ -449,9 +540,23 @@ func queryEventsEndpoint(inverterSerial string) (*EventsResponse, error) {
 	return &eventsResponse, nil
 }
 
+// The events counter reported by OpenDTU resets every day.
+// However, this assumes that the inverters from which the events are pulled are reset every day, during the night.
+// Additionally, this function requires OpenDTU to be set to "Clear Eventlog at midnight" for each inverter.
+// "Clear Eventlog at midnight" should be set to ON in "Inverter settings" -> "pencil" -> "Advanced".
+// To account for possible time drifts, the first and last 10 minutes of the day are excluded.
+//
+// Longest day NL: sun up 4:16, sun down 22:50
+// Shortest day NL: sun up 8:44, sun down 16:25
 func getPreviousEventsCount(db *sql.DB, inverterSerial string) int {
 	var count int
-	err := db.QueryRow("SELECT COUNT(*) FROM events WHERE inverter_serial = $1", inverterSerial).Scan(&count)
+	err := db.QueryRow(`
+	SELECT COUNT(*) 
+	FROM opendtu_events 
+	WHERE inverter_serial = $1
+    AND timestamp >= CURRENT_DATE + INTERVAL '10 minutes'
+	AND timestamp < CURRENT_DATE + INTERVAL '23 hours 50 minutes'
+	`, inverterSerial).Scan(&count)
 	if err != nil && err != sql.ErrNoRows {
 		logger.Error("Error querying previous events count", "error", err)
 	}
@@ -459,24 +564,26 @@ func getPreviousEventsCount(db *sql.DB, inverterSerial string) int {
 }
 
 func insertEvents(db *sql.DB, inverterSerial string, events *EventsResponse) {
-	timestamp := time.Now()
+	timeZone := config.TZ
+	loc, _ := time.LoadLocation(timeZone)
+	timestamp := time.Now().In(loc)
 
 	for _, event := range events.Events {
 		// Insert events data into the events table
 		_, err := db.Exec(`
-			INSERT INTO events (timestamp, inverter_serial, message_id, message, start_time, end_time)
+			INSERT INTO opendtu_events (timestamp, inverter_serial, message_id, message, start_time, end_time)
 			VALUES ($1, $2, $3, $4, $5, $6);
 		`, timestamp, inverterSerial, event.MessageID, event.Message, event.StartTime, event.EndTime)
 		if err != nil {
-			logger.Error("Error inserting into events table", "error", err)
+			logger.Error("Error inserting into opendtu_events table", "error", err)
 		}
 	}
 
 	if len(events.Events) > 0 && events.Events[0].EndTime == 0 {
-		// If end_time is 0, schedule a job to update the corresponding message row every 30 minutes
+		// If end_time is 0, schedule a job to update the corresponding message row every 10 minutes
 		go func() {
 			for {
-				time.Sleep(30 * time.Minute)
+				time.Sleep(10 * time.Minute)
 				updatedEvents, err := queryEventsEndpoint(inverterSerial)
 				if err != nil {
 					logger.Error("Error querying events endpoint for updates", "error", err)
@@ -492,16 +599,22 @@ func insertEvents(db *sql.DB, inverterSerial string, events *EventsResponse) {
 
 func updateEvents(db *sql.DB, inverterSerial string, events *EventsResponse) {
 	for _, event := range events.Events {
-		// Update events data in the events table
+		// Update events data in the opendtu_events table
 		_, err := db.Exec(`
-			UPDATE events SET end_time = $1 WHERE inverter_serial = $2 AND start_time = $3 AND end_time = 0;
+			UPDATE opendtu_events SET end_time = $1 WHERE inverter_serial = $2 AND start_time = $3 AND end_time = 0;
 		`, event.EndTime, inverterSerial, event.StartTime)
 		if err != nil {
-			logger.Error("Error updating events table", "error", err)
+			logger.Error("Error updating opendtu_events table", "error", err)
 		}
 	}
 }
 
+// basicAuth generates the Basic Auth header value
+func basicAuth(username, password string) string {
+	credentials := username + ":" + password
+	return "Basic " + base64.StdEncoding.EncodeToString([]byte(credentials))
+}
+
 // TODO: finish this function.
 // func updateInverterConfig(db *sql.DB) {
 // 	// Periodically query the /api/inverter/list
@@ -520,8 +633,8 @@ func updateEvents(db *sql.DB, inverterSerial string, events *EventsResponse) {
 // }
 
 // func queryConfigEndpoint() (*InverterSettingsData, error) {
-// 	remoteURL := os.Getenv("REMOTE_URL")
-// 	endpoint := fmt.Sprintf("http://" + remoteURL + "/api/inverter/list")
+// 	openDTUAddress := os.Getenv("OPENDTU_ADDRESS")
+// 	endpoint := fmt.Sprintf("http://" + openDTUAddress + "/api/inverter/list")
 
 // 	resp, err := http.Get(endpoint)
 // 	if err != nil {

migrations/00001_log.sql

@@ -0,0 +1,14 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS opendtu_log (
+    timestamp TIMESTAMPTZ UNIQUE DEFAULT CURRENT_TIMESTAMP,
+    power NUMERIC,
+    yieldday NUMERIC,
+    yieldtotal NUMERIC
+);
+
+CREATE INDEX IF NOT EXISTS opendtu_log_timestamp_idx ON opendtu_log (timestamp);
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/00002_inverters.sql

@@ -0,0 +1,19 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS opendtu_inverters (
+    timestamp TIMESTAMPTZ,
+    -- FOREIGN KEY (timestamp) REFERENCES opendtu_log(timestamp),
+    -- 	inverter_serial is TEXT as some non-Hoymiles inverters use non-numeric serial numbers.
+    -- 	An additional advantage is that it makes plotting in Grafana easier.
+    inverter_serial TEXT,
+    name TEXT,
+    producing BOOL,
+    limit_relative NUMERIC,
+    limit_absolute NUMERIC
+);
+
+CREATE INDEX IF NOT EXISTS opendtu_inverters_timestamp_idx ON opendtu_inverters (timestamp);
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/00003_inverters_ac.sql

@@ -0,0 +1,20 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS opendtu_inverters_ac (
+    timestamp TIMESTAMPTZ,
+    -- FOREIGN KEY (timestamp) REFERENCES opendtu_log(timestamp),
+    inverter_serial TEXT,
+    ac_number INT,
+    power NUMERIC,
+    voltage NUMERIC,
+    current NUMERIC,
+    frequency NUMERIC,
+    powerfactor NUMERIC,
+    reactivepower NUMERIC
+);
+
+CREATE INDEX IF NOT EXISTS opendtu_inverters_ac_timestamp_idx ON opendtu_inverters_ac (timestamp);
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/00004_inverters_dc.sql

@@ -0,0 +1,22 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS opendtu_inverters_dc (
+    -- id SERIAL PRIMARY KEY,
+    timestamp TIMESTAMPTZ,
+    -- FOREIGN KEY (timestamp) REFERENCES opendtu_log(timestamp),
+    inverter_serial TEXT,
+    dc_number INT,
+    name TEXT,
+    power NUMERIC,
+    voltage NUMERIC,
+    current NUMERIC,
+    yieldday NUMERIC,
+    yieldtotal NUMERIC,
+    irradiation NUMERIC
+);
+
+CREATE INDEX IF NOT EXISTS opendtu_inverters_dc_timestamp_idx ON opendtu_inverters_dc (timestamp);
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/00005_inverters_inv.sql

@@ -0,0 +1,19 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS opendtu_inverters_inv (
+    -- id SERIAL PRIMARY KEY,
+    timestamp TIMESTAMPTZ,
+    -- FOREIGN KEY (timestamp) REFERENCES opendtu_log(timestamp),
+    inverter_serial TEXT,
+    temperature NUMERIC,
+    power_dc NUMERIC,
+    yieldday NUMERIC,
+    yieldtotal NUMERIC,
+    efficiency NUMERIC
+);
+
+CREATE INDEX IF NOT EXISTS opendtu_inverters_inv_timestamp_idx ON opendtu_inverters_inv (timestamp);
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/00006_events.sql

@@ -0,0 +1,17 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS opendtu_events (
+	-- id SERIAL PRIMARY KEY,
+	timestamp TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
+	inverter_serial TEXT,
+	message_id INT,
+	message TEXT,
+	start_time INT,
+	end_time INT
+);
+
+CREATE INDEX IF NOT EXISTS opendtu_events_timestamp_idx ON opendtu_events (timestamp);
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/00007_events.sql

@@ -0,0 +1,26 @@
+-- +goose Up
+-- +goose StatementBegin
+DO $$
+BEGIN
+    -- Check if start_timestamp column exists
+    IF NOT EXISTS (SELECT 1 FROM information_schema.columns 
+                WHERE table_name='opendtu_events' 
+                AND column_name='start_timestamp') THEN
+        -- Add start_timestamp column
+        ALTER TABLE opendtu_events 
+        ADD COLUMN start_timestamp TIMESTAMPTZ;
+    END IF;
+
+    -- Check if end_timestamp column exists
+    IF NOT EXISTS (SELECT 1 FROM information_schema.columns 
+                WHERE table_name='opendtu_events' 
+                AND column_name='end_timestamp') THEN
+        -- Add end_timestamp column
+        ALTER TABLE opendtu_events 
+        ADD COLUMN end_timestamp TIMESTAMPTZ;
+    END IF;
+END $$;
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/00008_hints.sql

@@ -0,0 +1,16 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS opendtu_hints (
+    -- id SERIAL PRIMARY KEY,
+    timestamp TIMESTAMPTZ,
+    -- FOREIGN KEY (timestamp) REFERENCES opendtu_log(timestamp),
+    time_sync BOOL,
+    radio_problem BOOL,
+    default_password BOOL
+);
+
+CREATE INDEX IF NOT EXISTS opendtu_hints_timestamp_idx ON opendtu_hints (timestamp);
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+-- +goose StatementEnd

migrations/fs.go

@@ -0,0 +1,6 @@
+package migrations
+
+import "embed"
+
+//go:embed *.sql
+var FS embed.FS

systemd/opendtu-logger.service

@@ -0,0 +1,44 @@
+  GNU nano 7.2                                                                          /etc/systemd/system/opendtu-logger.service                                                                                    
+[Unit]
+Description=OpenDTU Logger
+Documentation=https://git.hollander.online/energy/opendtu-logger
+After=network.target auditd.service
+
+# If using a PostgreSQL DB on the local machine, uncomment the following additional "After" and "Require" sections.
+## PostgreSQL
+# After=postgresql.service
+# Requires=postgresql.service
+
+[Service]
+RestartSec=10s
+Type=simple
+
+User=opendtu-logger
+Group=opendtu-logger
+
+Environment="OPENDTU_ADDRESS=opendtu.local:80"
+Environment="OPENDTU_AUTH=false"
+Environment="OPENDTU_USERNAME=admin"
+Environment="OPENDTU_PASSWORD=your_super_secret_password"
+Environment="DB_URL=host=localhost port=5432 user=postgres password=secret dbname=dtu sslmode=disable"
+Environment="TIMESCALEDB_ENABLED=true"
+Environment="TZ=Europe/Amsterdam"
+Environment="LOG_LEVEL=INFO"
+
+
+WorkingDirectory=/opt/opendtu-logger/
+ExecStart=/opt/opendtu-logger/opendtu-logger
+Restart=always
+
+# Isolate OpenDTU Logger from the rest of the system
+PrivateTmp=true
+PrivateDevices=true
+ProtectHome=true
+NoNewPrivileges=true
+ProtectSystem=strict
+
+# Only allow writes to the following directories
+ReadWritePaths=/opt/opendtu-logger/data/
+
+[Install]
+WantedBy=multi-user.target