Mycobot serial port shows up as /dev/ttyACM* instead of /dev/ttyUSB* in Ubunt 18.04

[dirksavage88]

Hello,

I am having the issue where I can't get the Mycobot to show up as a USB device in linux. This is correctable in the mycobot pi API (where I can just change it on the fly).

Is there a way to fix this in the ROS API also? Or is there a way to get it to show up as a USB device.

[blcuwc]

According to some blogs trying to explain the differences between these two shown ports:
https://rfc1149.net/blog/2013/03/05/what-is-the-difference-between-devttyusbx-and-devttyacmx/
https://forums.raspberrypi.com/viewtopic.php?t=281062

It is hard to change the serial port from /dev/ttyACM* to /dev/ttyUSB*. If a serial device identifies as a Abstract Control Model (ACM) device, the kernel has assigned the name before you can do anything with it.

When you are using ROS API, you can specify the port name to be used in the command line, have a try to see if mycobot ROS API works with /dev/ttyACM* devices.

eg. rosrun mycobot_280 slider_control.py _port:=/dev/ttyUSB0 _baud:=115200 can be replaced with
rosrun mycobot_280 slider_control.py _port:=/dev/ttyACM0 _baud:=115200 when you try to move the real mycobot through dragging the slider.

Hope this helps.