I am using an XM540-W270-T with an Arduino Mega and the dynamixel shield for arduino. Just trying to test out the example sketches and the motor moves as expected, but the return I am getting in the serial monitor is just junk data, lots of question marks and symbols. I have tried running numerous different baud rates, changing my power supply, etc. Everything is setup identically to the way the tutorials on the youtube are. Unsure where to go to next.
Can you share your code and a screenshot of the actual Serial Monitor window?
Using the Serial Monitor with UNO Mega is complex. Have read this web instruction yet?
If you can afford it I would suggest that you upgrade to UNO R4 which has two hardware serial ports so none of the craziness of flipping a switch to download or use the sketch.