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Add logic to only log meter readings on change. Otherwise, insert NULL.
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This commit is contained in:
Pieter Hollander 2024-02-18 14:50:01 +01:00
parent 8673fabccd
commit 66ad959ada
Signed by: pieter
SSH key fingerprint: SHA256:HbX+9cBXsop9SuvL+mELd29sK+7DehFfdVweFVDtMSg
1 changed files with 23 additions and 5 deletions
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28
main.go
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@ -15,15 +15,15 @@ import (
type Payload struct {
T string `json:"t"`
Dt1 int `json:"dt1"`
Dt2 int `json:"dt2"`
Rt1 int `json:"rt1"`
Rt2 int `json:"rt2"`
Dt1 *int `json:"dt1"`
Dt2 *int `json:"dt2"`
Rt1 *int `json:"rt1"`
Rt2 *int `json:"rt2"`
D int `json:"d"`
R int `json:"r"`
F int `json:"f"`
Fl int `json:"fl"`
G int `json:"g"`
G *int `json:"g"`
V1 int `json:"v1"`
V2 int `json:"v2"`
V3 int `json:"v3"`
@ -88,6 +88,18 @@ func main() {
select {}
}
var prevDt1, prevDt2, prevRt1, prevRt2, prevG int
func updateFieldIfChanged(currentValue *int, previousValue *int) *int {
if currentValue != nil && *currentValue == *previousValue {
return nil // No change, so we prepare to insert a NULL
} else if currentValue != nil {
*previousValue = *currentValue // Update the previous value to the current one
return currentValue
}
return currentValue // Return the original value if it's nil
}
func mqttMessageHandler(client mqtt.Client, msg mqtt.Message) {
// Parse JSON payload
var payload Payload
@ -104,6 +116,12 @@ func mqttMessageHandler(client mqtt.Client, msg mqtt.Message) {
return
}
payload.Dt1 = updateFieldIfChanged(payload.Dt1, &prevDt1)
payload.Dt2 = updateFieldIfChanged(payload.Dt2, &prevDt2)
payload.Rt1 = updateFieldIfChanged(payload.Rt1, &prevRt1)
payload.Rt2 = updateFieldIfChanged(payload.Rt2, &prevRt2)
payload.G = updateFieldIfChanged(payload.G, &prevG)
// Insert data into PostgreSQL
err = insertData(timestamp, payload)
if err != nil {