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Forum › Coding Corner › avrdude error when trying to connect to ATmega328P › Reply To: avrdude error when trying to connect to ATmega328P

May 19, 2022 at 3:45 pm #7105
Martyn

    Does any of this help: https://forum.arduino.cc/t/avrdude-ser_open-cant-open-device-com3-access-is-denied/51583/9

    You may have a hardware device conflict, or you may have Cura running… Cura constantly checks all the com ports and prevents any communication between the Arduino IDE and the board.

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