I have bricked Linkit 7688 duo

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Hi there~,


Please follow Updating Arduino Bootloader to fix the avr chip bootloader issue.

https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/tutorials/linkit-smart-7688-duo/linkit-smart-7688-duo-development-board-and-arduino-ide/updating-arduino-bootloader

If the issue is not solved, Please post the avrdude content mismatch error in text format.

Thanks

best rgds
Bill