diff --git a/README.md b/README.md
index ff6a76d..fd095b7 100644
--- a/README.md
+++ b/README.md
@@ -93,7 +93,7 @@ Data is stored in a table containing the following columns
 
 P1 Logger relies on a JSON input provided by a P1 reader.
 
-The P1 reader should send its data to an MQTT broker in the following JSON structure
+The P1 reader should send its data to an MQTT broker. Each message should be in the following JSON structure.
 
 ```json
 {
@@ -118,7 +118,8 @@ The P1 reader should send its data to an MQTT broker in the following JSON struc
     "d3":4,
     "r1":41,
     "r2":71,
-    "r3":0}
+    "r3":0
+}
 ```