Modbus Module for ESP32

[eydam-prototyping]

Hey,

I created a Modbus Module for the ESP32 and need some people to test it :)
You can create a RTU-Master/Slave and TCP-Server/Client.
My own tests are passing, but it would be great, if someone else could do some more tests.

You can find the code here:
https://github.com/eydam-prototyping/micropython/tree/TEy-Modbus-2022-01-09

Some pre compiled images and the documentation here:
https://drive.google.com/drive/folders/12ZPlzrywi3Wp9dnlOKTvR8OETy1F6aCX
(always choose the newest ones)

There are some known bugs:
https://github.com/eydam-prototyping/micropython/issues?q=is%3Aissue+is%3Aopen+label%3Amodbus+
If you know how to solve them, please let me know.

Maybe we could integrate it to the main repo at some point.

Best regards
Tobias

[beyonlo]

@eydam-prototyping

That is a great work and will help so much the people. Modbus is essential protocol for the industry.

@dpgeorge is possible to have this module in the master, to maybe, have it by default in the next Micropython release for ESP32?

Thank you very much.

[e135193]

@eydam-prototyping Can you please share an example usage python file so that people can test it.

I wish to test it as well.

Best Regards

[phildealm]

Hi,
any news on it?
I'm willing to test it as I do have a project that needs communicating using modbus RTU.

However, I was not able to get started as I lack some basic information on how to use it.

thanks,

[eydam-prototyping]

Hey @e135193 and @phildealm.

sorry for the late replay.
There is an example in the documentation. You can find it here:
https://drive.google.com/drive/folders/12ZPlzrywi3Wp9dnlOKTvR8OETy1F6aCX (the PDF-File).

Is that enough? Or do you need more?

Best regards,
Tobias

[beyonlo]

Hello @eydam-prototyping

I would like to use that ModBus module on the ESP32-S3, over WiFi and 485. Could you to build supporting the ESP32-S3 as well? Or are there a doc where I can to build by myself the ModBus module for other ESP32 chip, like as the S3?

Thank you very much!