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?

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

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mahboudz March 4, 2022, 10:05am 16

using upload_port instead of monitor_port, seems to have fixed this issue (I have others now. Great).