This tool fetches the current telemetry information from the HMS-XXXXW-T2 series of micro-inverters and publishes the information into an MQTT broker. Please note that it doesn’t implement a DTU, but pulls the information off the internal DTU of these inverters.
The tool is distributed as source only — for now. You’ll have to download, compile and run it yourself.
$ git clone https://github.com/DennisOSRM/hms-mqtt-publisher.git $ cd hms-mqtt-publisher $ cargo r --release [inverter] [mqtt broker] [mqtt user] [mqtt password] [optional:mqtt port]
The latest release is directly deployable via a docker image from DockerHub. It is built automatically for the following Linux platforms:
- and arm64.
The parameters to access the inverter and MQTT instance are pulled from environment variables:
Please note: The tool does not come with any guarantees and if by chance you fry your inverter with a funny series of bits, you are on your own. That being said, no inverters have been harmed during development.
- One can only fetch updates approximately twice per minute. The inverter firmware seems to implement a mandatory wait period of a little more than 30 seconds. If one makes a request within 30 seconds of the previous one, then the inverter will reply with the previous reading and restart the countdown. It will also not send updated values to S-Miles Cloud if this happens.
- The tool is a CLI tool and not a background service.
- The tools was developed for (and with an) HMS-800W-T2. It may work with the other inverters from the series, but is untested at the time of writing