avrdude: ser_open(): can’t open device “\\.\COM3”: Access is denied I get this error message when i try to upload code to my arduino. Does anyone know what is going on? I have installed the proper drivers and it works fine. My port appears on the menu and it is the corresponent to the device. bless Related Posts: Arduino Sketch upload issue – avrdude: stk500_recv(): programmer is not responding Arduino Sketch upload issue – avrdude: stk500_recv(): programmer is not responding avrdude: stk500v2_ReceiveMessage(): timeout How to convert int to string on Arduino? Arduino Nano – “avrdude: ser_open():system can’t open device “\\.\COM1″: the system cannot find the file specified” Bitwise operation |= in C arduino suddenly shows “avrdude: ser_open(): can’t open device “\\.\COM3” after last upload ATMega328P “AVRDude: Could not find USBTiny Device (0x1781/0xc9f)” try/catch block in Arduino Windows .NET API / Windows 7 / Bluetooth communication with Intel Curie Arduino / Genuino 101 Control an Arduino with Java Arduino IDE can’t find ESP8266WiFi.h file Arduino IDE can’t find ESP8266WiFi.h file Arduino Leonardo – “avrdude: butterfly_recv(): programmer is not responding” Arduino sprintf float not formatting Mapping a numeric range onto another Arduino IDE is not showing any port macOS How to convert an ASCII char to its ASCII int value? how to stop a loop arduino How to store data in the flash memory of a Arduino Uno (ATmega328p)
