You need AVR programmer (or another Arduino board) and you have prepare some cabling, perhaps do a tiny soldering. You have to start upload just right, after powering the board with USB – otherwise it won’t connect to bootloader (unless this was in my case).īurning new bootloader is bit more tricky. Changing GRBL is quite easy – just use avrdude and upload hex grbl file. But it uses ancient GRBL 0,8 or 0,9, and has old Arduino bootloder. It has three sockets for pololu motor drivers, spindle and laser connection etc. Woodpecker is quite old (but still sold), Chinese board for CNC machines. Just needed to find proper way to connect to the board. Anyway since I anyway wanted to upload newer bootloader no harm done. Interesting thing – firmware was still working ok. I’ve downloaded binary firmware (to back it up) with chosen ATmega2560 instead of ATmega328P – since it has more memory, dump was too big to fit later in 328p and when I wanted to restore it, I’ve overwritten bootloader. Not so long ago I’ve managed to corrupt my bootloader in woodpecker board by silly mistake.
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