avrdude: ser_open(): can't open device "unknown": No such file or directory - Installation & Troubleshooting - Arduino Forum
dobročinnosť tehotná vyjednávať avrdude ser_open can t open device com3 predpojatosť obsiahly námorná míľa
IOT,笔记:avrdude: ser_open(): can't open device "\\.\COM3": 系统找不到指定的文件。 - 无踪无影- 博客园
Arduino IDE error: ser_open(): can't open device "/dev/ttyACM0": Permission denied - YouTube
Arduno on linux上传失败: avrdude: ser_open(): can't open device “/dev/ttyUSB0“: Permission denied_Kearney form An idea的博客-CSDN博客
Fix: Most Common Error Uploading to Arduino or Any Other Board
Arduino-er: Arduino IDE error - avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied
Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow
Arduino UNO not working; Arduino: avrdude: ser_open(): can't open device "\\.\COM4": The system cannot find the file specified. . I haI have also changed the COM Port in windows like the YT
Can't open device "\\.\COM4": Access is denied error when uploading a sketch from Arduino IDE | I learned it. I share it.