Sofar g3 LSW-3 logger reader

Tool written in GO for reading metrics from Sofar LSW-3 and writing results into MQTT topics. Program queries logger modbus port in infinite loop and sends data into MQTT topics (e.g. mosquito in HomeAssistant).

Installation and setup

1. Download go 1.19
2. Clone this repo git clone git@github.com:kubaceg/sofar_g3_lsw3_logger_reader.git
3. Go into project directory cd sofar_g3_lsw3_logger_reader
4. Copy example config cp config-example.yaml config.yaml
5. Edit config.yaml in Your favorite editor, fill all required stuff
6. Build program make build or build for ARM machines e.g. raspberryPi make build-arm
7. Run ./sofar or sofar-arm

Output data format

MQTT

Data will be sent into MQTT topic with name {mqttPrefix}/{fieldName} where:

• mqttPrefix is value defined in config.yaml e.g. /sensors/energy/inverter
• fieldName is measurement name, all available measurements are described in adapters/devices/sofar/sofar_protocol.go, e.g. PV_Generation_Today

Full topic name for given example values is /sensors/energy/inverter/PV_Generation_Today. Additional field is All which contains all measurements and their values marshalled into one json.

OTLP

Data can also be sent over OTLP protocol to a gRPC or http server. Typically, this would be received by the OTel-Collector for further export to any required platform.

Metrics are all captured as gauges and recorded and exported at the same frequency that measurements are taken. Metric names follow the convention sofar.logger.<fieldName> by default. This can be updated in the configuration file.

Grafana dashboard

You can monitor Your solar instalation using grafana dashboard

Origin

This is based on program written by @sigxcpu76 XtheOne/Inverter-Data-Logger#37 (comment).

Contributing

Feel free if You want to extend this tool with new features. Just open issue or make PR.