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Unwrap modbus RTU and offer modbus over TCP #1

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@dilyanpalauzov

Can this software be extended to unwrap the solarman protocol, which tunnels Modbus, and offer just Modbus over TCP?

I want to use a home automation system, which supports Modbus, Sunspec and Solarman logger protocol, but it can support either Sunspec protocol or Solarman logger protocol - not at the same time. The SunSpec modbus variant allows discovery of the connected devices with the information profiles, e.g. profile 101 - https://github.com/sunspec/models/blob/master/smdx/smdx_00101.xml and https://github.com/sunspec/models/blob/master/json/model_101.json - is for Single Phase Inverter monitoring. In essence I have a Solarman logger and I want to utilize SunSpec.

For this reason I will appreciate very much, if this proxy software also offers Modbus over TCP protocol - clients connect to the proxy using Modbus TCP, and the proxy wraps the packets, sends them to the solarman logger, receives the answer, unwraps it, and returns Modbus/TCP to the initial client.

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