thenetstriker/mppttomqtt

Script to transfer data from SRNE SR-MT2410 to MQTT

MpptToMqtt

Description

This script sends the data from the SRNE SR-MT2410 solar charge controller to an MQTT server. I only tested this with this device, but maybe it also works for other charge controllers.

Requirements

• TTL Cable: 895-TTL-232R-5V
• RJ12 cable

Wiring

Pin RJ12	RJ12 function	PIN TTL Cable	TTL function
1	TX	5	RX
2	RX	4	TX
3	GND	1	GND

Configuration

All configuration values can be found in the MpptToMqttConfig.py:

import logging

serialPort = "/dev/tty.usbserial-FTBBWTC9"
logFileName = "MpptToMqtt.log"
logLevel = logging.ERROR
controllerName = "MpptController01"
mqttServer = "172.17.2.21"
mqttPort = 1883
reportInterval = 15

MQTT topics

Subscribable topics

Topic	Description
/controllername/Led	Solarpanel led Bit 8: led on Bit 8 & Bit 7: blink fast Bit 8 & Bit 6: blink slow
/controllername/ErrorCode	Error code
/controllername/Icons	Bit 8: Lamp symbol Bit 7: Battery led blink slow Bit 6: Battery led blink fast
/controllername/BatteryVoltage	Battery voltage
/controllername/PvVoltage	PV voltage
/controllername/ChargeCurrentAmpere	Current charge in ampere
/controllername/LoadCurrentAmpere	Current load in ampere
/controllername/Temperature	Temperature
/controllername/ChargeAmpere	Total ampere charged
/controllername/DischargeAmpere	Current discharge in ampere

Command topics

Topic	Description
/controllername/Command	Topic for commands. Only command at the moment is ResetChargeAmpere to reset the total ampere charged.