I got a question, which said, “could not open port ‘/dev/cu.usbserial-210292AD33E90’: [Errno 16] could not open port /dev/cu.usbserial-210292AD33E90: [Errno 16] Resource busy: '/dev/cu.usbserial-210292AD33E90” The detail is as follows: [image] I tried changing to another USB port but it didn’t w…

Sorry, I of course meant (difference is last digit): monitor_port = /dev/cu.usbserial-210292AD33E91 The idea is to check the second port on your board. The board seems to have an FTDI chip with multiple serial ports. Isn’t there any documentation what port should be used?

maxgerhardt October 14, 2021, 2:02pm 4

Which USB-serial converter is on the adapter? CH340? Maybe it’s a driver issue. Are the are any other “usbserial” devices in /dev/?

Resource busy: '/dev/cu.usbserial-210292AD33E90'