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Submitted by Aleksej Horvat on Sat, 08/08/2020 Permalink

I flashed the Compiled Ultimate Marlin (HEX) for Ender 3 + BLTouch + TMC2208 version of your firmware and flashing completed sucessfully. I still have the stock display connected without the adapter board, which is now beeping constantly (high pitched noise). I beleive this is because pin 27 expects the BLTouch which I still must finish connecting. I am trying to upload a new version with BLTouch pin changed to 29, or downgrade to 1.1.9 but in all cases I receive an error

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00

The board seems to boot normally and I can access menu functions. I can connect with OctoPrint and the board seems to reset when I try to flash with Avrdude but now I am stuck. Does your firmware version overwrite the bootloader? Do you have some advice for how I can reflash (I do not have the avrflasher at the moment).

Thank you also for sharing your efforts and any advice you could provide.

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