Bert

Did you also try to define Stop like this: ```python from pybricks.parameters import Port, Stop ``` I get this error without it: ``` Motor initialized successfully. Traceback (most recent call...

I ran your program on my Technichub and it runs fine until the syntax error on the last line ```python motor.stop(Stop.HOLD) ``` `motor.stop()` has no arguments. But the program shows...

Thanks for your response. My tests ran with stable 3.6.1 and a 4.0 pre-alpa firmware with out problem. Tried two different hubs too. In no way am I a hardware...

> And the probability that both new motors have a similar hardware problem seems pretty small. I agree and have no more hints at the moment.

Just a hunch: what if the batteries are at the end of their live? A motor needs more power than a sensor. Adjusted your program to show the battery voltage:...

> And I'm pretty sure the CSR dongles don't require any extra firmware, so should be better than most others. I have a TP-link UB500 and indeed that needs extra...

> pybricksdev has similar issues on Windows for the same reason. I did not see errors on win 11(25H2) using ```pybricksdev run usb myprog.py``` to an EV3, but on flash...

Even without the coffee 😉 similar to running two code.pybricks.com tabs in the same chrome and connect to the same hub twice. And if not overlapping the hub runs fine...

Not really sure what you are asking, but added the print you add to my hand editted connections/ev3.py that adds 0x00 as prefix for #2391 get: ``` pybricksdev flash ev3-firmware-build-4515-gitf3f6ccbe.zip...

Just to be sure, I use this snippet: ```python def _receive_reply( self, command: Command, message_number: int, force_length: int = 0 ) -> bytes: """ Receive a reply from the EV3...