Hello,
I wanted to introduce you to my little project, maybe it helps one or the other.
it is based on a esp8266 and a max3232
currently i am testing the software with an easun smv 3k plus, orginal a 3023MSXE with PI30 protokol.
actualy works to get the solar, battery and grid data
at the moment...
if anyone interested, i have build a little program for the ESP8266 (wemos D1 mini) to get the Daly BMS values into a web interface and send it over MQTT, it is possible to switch the MOS Gates for charge and discharge and get varius data
https://github.com/softwarecrash/DALY-BMS-to-MQTT
i dont know about the hass.io item generation, have you a link to explain me this?
partial the project have json strings with data, but its a lot of boring write work, so its not complete. so i search at the moment for a way to generate the datapoint lists automaticly