![Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/7/b/b/7bbe50ed5d6e9d06659f00ef02d5800fb608b2ee.png)
Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum
![Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow](https://i.stack.imgur.com/cx8c7.png)
Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow
![Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow](https://i.stack.imgur.com/1kNPb.png)
Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow
![avrdude: ser_open(): can't open device "unknown": No such file or directory - IDE 1.x - Arduino Forum avrdude: ser_open(): can't open device "unknown": No such file or directory - IDE 1.x - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/7/5/f/75fb84cceb041233e9659b624d0a93a2ced922b0.png)
avrdude: ser_open(): can't open device "unknown": No such file or directory - IDE 1.x - Arduino Forum
![avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xc7 - Avrdude, stk500, Bootloader issues - Arduino Forum avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xc7 - Avrdude, stk500, Bootloader issues - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/5/d/8/5d83804ce12414c0400cb189d6fad42f076ca1b0.png)
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xc7 - Avrdude, stk500, Bootloader issues - Arduino Forum
![Arduino error (Ubuntu) - avrdude: ser_open(): can't open device "COM1": No such file or directory - YouTube Arduino error (Ubuntu) - avrdude: ser_open(): can't open device "COM1": No such file or directory - YouTube](https://i.ytimg.com/vi/oQLzCdDhkgo/hqdefault.jpg)
Arduino error (Ubuntu) - avrdude: ser_open(): can't open device "COM1": No such file or directory - YouTube
![Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/d/c/2/dc29648497533da38218cd3ba13d515c9e7233a3.png)
Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum
![Failed to upload: avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x44 - IDE 1.x - Arduino Forum Failed to upload: avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x44 - IDE 1.x - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/e/e/4/ee4d04915c8754f4b049044f09b80029a5ee689c_2_658x500.png)
Failed to upload: avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x44 - IDE 1.x - Arduino Forum
![avrdude: ser_open() : can't set com-state for "\\.\COM5" - Avrdude, stk500, Bootloader issues - Arduino Forum avrdude: ser_open() : can't set com-state for "\\.\COM5" - Avrdude, stk500, Bootloader issues - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/e/f/d/efdca1cfe9c1caad027f9e41611e92803171002b.jpeg)
avrdude: ser_open() : can't set com-state for "\\.\COM5" - Avrdude, stk500, Bootloader issues - Arduino Forum
![Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/0/4/6/0462260fa1e6dd35112590e294f5df86e139620a_2_690x370.png)
Uploading error: Error:avrdude: ser_open(): can't set com-state for "\\.\COM3" - IDE 1.x - Arduino Forum
![Failed to upload: avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x44 - IDE 1.x - Arduino Forum Failed to upload: avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x44 - IDE 1.x - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/7/e/3/7e30b5962d1bb3f708cfef69d26f8737e45dac47_2_685x500.png)
Failed to upload: avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x44 - IDE 1.x - Arduino Forum
![Error (avrdude: stk500_recv(): programmer is not responding) while uploading new Firmware to Ender 3 : r/3Dprinting Error (avrdude: stk500_recv(): programmer is not responding) while uploading new Firmware to Ender 3 : r/3Dprinting](https://preview.redd.it/lzrh40251l231.jpg?width=5312&format=pjpg&auto=webp&s=de5ba22a136154d99f8b5cf07e14dab2707a28ac)