Modbus CRC Error

[faithless11]

Hey Guys,

I'am trying to use this Projekt for connecting to my Huawei Solar Inverter. But randomly every 3rd or 2nd Request ( Debug mode ) i got CRC Error or Packet length Error and somtimes Function Code error.

Does anyone know what I am doing wrong? Some hints? Im pretty new to this Mico-Controller-Stuff...

Thank you verry much!