This is in reality a UART bus that we could for example connect to a raspberry pi. I decided to write some code to do just that.
The data is published according to the Home Assistant MQTT Discovery specification. This allows the device to be auto-discovered in home assistant.
You will have to make your own cable for this. Connect GND, TX and RX to the pi. Do not connect the 5V pin. I used a logic level shifter between the pi and smartsolar controller just to be safe.
I have this running on a raspberry pi zero, which consumes less than 100mA.
Let me know what you think!