Added comment line for checking

mqtt_client.go

@@ -99,7 +99,7 @@ func messageHandler(client mqtt.Client, msg mqtt.Message) {
 		return
 	}
 
-	// Check for duplicates
+	// Check for duplicates keys
 	var exists int
 	existsQuery := `SELECT 1 FROM temp_live_readings WHERE created_at = $1 AND mfm_meter_id = $2 LIMIT 1`
 	err = db.QueryRow(existsQuery, payload.CreatedAt, mfmMeterID).Scan(&exists)
@@ -301,3 +301,5 @@ func main() {
 	sigChan := make(chan os.Signal, 1)
 	<-sigChan
 }
+
+