Arduino：1.8.16 (Mac OS X), ボード："Arduino Uno"
Using Port : /dev/cu.usbmodem14101
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: ser_open(): can't open device "/dev/cu.usbmodem14101": Resource busy
avrdude done. Thank you.
Problem uploading to board. See https://support.arduino.cc/hc/en-us/sections/360003198300 for suggestions.
Do you have a terminal window already opened and using that port?
Yes, I have selected this from the terminal window.
I bought a regular ARDUINO UNO R3, but I get the same error.
This error seems to be the problem.
can't open device "/dev/cu.usbmodem14201": Resource busy
If you have any solution, please let me know.
After writing many times, I found that it was rarely successful.
I plugged in the USB cable while holding down the reset button and pressed reset for 10 seconds. I read the writing, so I tried it, but I feel that the success rate will increase a little.
Sometimes I get an error even after writing 100 times, and sometimes I succeed in the third time.
If the writing is successful, disconnect the USB and use an external power supply to operate.
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