Modbus sample errors- cdc acm

[Dzolo2k1]

Hi, 

i want to use modbus RTU server sample, ive done everything just like in guide, used proper devicetree, commented line in overlay etc. Downloaded pymodbus with the plugin to have a console working with just commands. And this is what i get everytime: 


Any idea how can i repair it? I want to use sample in my own code, but i cant get it working. Ofc ive changed command to start terminal with ttyACM0. 

[Dzolo2k1]

And it didnt work...

[runsiv]

runsiv said:

v2.6.1, west worskpace v2.5.2

If you are using toolchain 2.6.1 then everything is fine. 

I'm not sure what the issue is, but I'm asking internally to see if anyone has experience with it. It might be there are people more familiar with modbus on the zephyr discord so it would not hurt to ask there also. 

Regards

Runar

[Dzolo2k1]

Its not error with modbus actually, there is a problem with USB CDC ACM, i tried to use cdc acm sample and it also doesnt work in the same way *** Booting nRF Connect SDK v2.5.2 ***
[00:00:00.251,953] <inf> cdc_acm_echo: Wait for DTR

[runsiv]

As we now know from the discord chat. Wrong usb port. I totally forgot about that one. 

So in short: the nrf52840 has two usb ports, for the sample to work remember to connect to the usbport next to the buttons. 

Regards

Runar