OH3 Serial binding - mysensors show data in oh3 log

I’m beginner in OH and I can’t find how to debug serial binding.
I try to migrate from domoticz+mysensors serial gateway to OH3. I need to connect arduino through usb to rpi.
Is there any way to see data, which was received and sent from OH3 to serial?

To see what was received you can link the bridge string channel to a string item and then check the event log.

Enabling DEBUG logging for the binding will log what was sent to the openhab log.

Great! Thanks for the tip!