To read Hoymiles inverters there is a nice project called openDTU which uses an ESP32 to talk to them. This is a PCB for a ESP32 (38 Pin) and a NRF24L01+PA+LNA radio module.
☝️ I still have a few PCBs left. If you are interested please contact me. Contact details can be found here: https://github.com/foorschtbar or visit my Tindie store:
You find the case on Printables: Case for openDTU/ahoy Breakout Board (ESP32 and NRF24L01)
This is a updated version. The original is from dokuhn/openDTU-BreakoutBoard.