[riot-notifications] [RIOT-OS/RIOT] ERROR: Timeout waiting for ACK/NACK after 'Synch (0x55 0x55)' (#11031)

MrKevinWeiss notifications at github.com
Wed Feb 20 09:26:38 CET 2019

So this was attempted to be dealt with on the RIOT users list.  I have not been able to reproduce the issues though.  It seem like a serial connection is left open somehow.  The bootloader pin should be 6 according to the rev 14 schematics and the fact that @mohanmaniramesh bricked a number of devices when changing it to pin 7 leads be to believe that it is correct.

@mohanmaniramesh please clearly how you recover from the "Timeout waiting for ACK/NACK" state.  Once a device cannot be flashed how do you get it to flash again (ie. reset the computer, reopen the console, replug the board).  I know I already asked this but I need to know how it gets back to being able to flash.

FYI for other maintainers, I have spent a long time with both private and public emails going back and forth.  Any help to clarify or test and try to reproduce the issues are appreciated,

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