Modbus Protocol on Raspberry Pi 3 using Serial GPIO Ports

Hi there, I have a better suggestion , try using Node-Red and the Modbus plugin, if you are a beginner then this I think will be an easier route to go, I have loads of Node-Red videos on my channel and alot of them use Modbus to talk to a thermal imaging camera and other devices

Node Red is included with the Raspberry PI image and it is easy to add the Modbus plugin right from within Node-Red UI, look for the pallet manager. The plugin makes it so much easier to talk to modbus devices and node-red will allow easily to configure workflows and displays without the need for extensive coding. You can code stuff if you want but I would suggest getting to know Modbus first and then go from there.

If you need help with Modbus I can help, I just have never needed to use the python interfaces.

Regards

peter

Oh, my channel is https://www.youtube.com/thebreadboardca

If necessary i will create a video for E14 and post it here to help, I have many devices I can choose from

Sorry, missed the other part of your question, the, an Arduino may make a better Slave device and there is a sketch for that, just search for Arduino and Modbus.

Is there a reason you have to use MODSCAN 32, this seems to be more of a debug tool, it this an assignment or something, perhaps you can provide a little background info so others can also help