Trouble with port on Mac to setup connection to ESP32 - [Errno 16]

Development Tools IDE 1.x
1

Hello,

I have an issue connecting an ESP32 to my ArduinoIDE
(working on MacBook Air with OSCatalina), ArduinoIDE upload speed 115200

The port is detected /dev/cu.usbserial-0001 and appearing when I am connecting my ESP32, but when I try to upload a sketch I have the following error message :

esptool.py v2.6
Serial port /dev/cu.usbserial-0001
Traceback (most recent call last):
File "esptool.py", line 2959, in
File "esptool.py", line 2952, in _main
File "esptool.py", line 2652, in main
File "esptool.py", line 222, in init
File "serial/init.py", line 88, in serial_for_url
File "serial/serialposix.py", line 268, in open
serial.serialutil.SerialException: [Errno 16] could not open port /dev/cu.usbserial-0001: [Errno 16] Resource busy: '/dev/cu.usbserial-0001'
Failed to execute script esptool

Anyone has a suggestion to solve my issue ?

Thanks in advance
Alex

2

Has this been solved already? I am having the same problem.

3

Just don't use the port /dev/cu.cu.usbserial-0xxx, there should be other port named /dev/cu.SLAB_USBtoUART?.
Use that port instead.