Hi,
I am expert in the modbus protocol and in pymodbus. I see you have some problems with your project and I think I can help you get and write the values correctly to your devices. My proposal is simple, one milestone after the first review and a final milestone after you are satisfied.
To start with the project I will need a complete description of the devices you are trying to connect with and what problems are you facing.
Thanks for the opportunity and look forward to work with you.
Romulo