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avrdude: ser_open(): can't open device "\\.\COM9": Access is denied. - Avrdude, stk500, Bootloader issues - Arduino Forum
![avrdude: ser_open(): can't open device "\\.\COM9": Access is denied. - Avrdude, stk500, Bootloader issues - Arduino Forum avrdude: ser_open(): can't open device "\\.\COM9": Access is denied. - Avrdude, stk500, Bootloader issues - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/3/4/5/3452af44577a48236935825b34a289afdc5963b9_2_690x495.png)
avrdude: ser_open(): can't open device "\\.\COM9": Access is denied. - Avrdude, stk500, Bootloader issues - Arduino Forum
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avrdude: ser_open(): can't open device "\\.\COM9": Access is denied. - Avrdude, stk500, Bootloader issues - Arduino Forum
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Arduino Nano - "avrdude: ser_open():system can't open device "\\.\COM1": the system cannot find the file specified" - Stack Overflow
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Can't open device "\\.\COM4": Access is denied error when uploading a sketch from Arduino IDE | I learned it. I share it.
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Arduino error (Ubuntu) - avrdude: ser_open(): can't open device "COM1": No such file or directory - YouTube
![avrdude: ser_open(): can't open device "\\.\COM3": Не удается найти указанный файл. | Амперка / Форум avrdude: ser_open(): can't open device "\\.\COM3": Не удается найти указанный файл. | Амперка / Форум](http://robohash.org/mendal/?96x96.png)
avrdude: ser_open(): can't open device "\\.\COM3": Не удается найти указанный файл. | Амперка / Форум
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