I'm also looking for a solution with esp8266 to read the Pytes batteries and transfer them to homeAssistant. which interface do you use? can you share it with me - I'm happy to test it too ChristianI have made a small device with an esp8266 to read the data and send it to my SMH (SmartHome). I just finished the electronics and 80% of the codding. Similar to WifiShine. I will let you know when it`s done!