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

mohanmaniramesh notifications at github.com
Sun Mar 10 18:57:12 CET 2019

Thanks this was Good way

On Sat, Mar 9, 2019 at 11:19 AM Siddharth Gupta <notifications at github.com>

> @mohanmaniramesh <https://github.com/mohanmaniramesh> @MrKevinWeiss
> <https://github.com/MrKevinWeiss>
> I am using the openmote-B for a research project, and had borrowed a few
> devices from my university lab. When I first tried to flash the devices I
> was getting the same error:
> Timeout waiting for ACK/NACK after 'Synch (0x55 0x55)'
> Initially, I thought that it was not selecting the right port and started
> looking in my /dev folder to figure out the port and found 2 ports
> belonging to the mote tty.usbserial-xxxx0 and tty.usbserial-xxxx1.
> I then tried flashing the device with port tty.usbserial-xxxx1 using the
> command:
> $ BOARD=openmote-b PORT=/dev/tty.usbserial-xxxx1 make flash
> This was the command that was being called for flashing though:
> {path_to_RIOT}/dist/tools/cc2538-bsl/cc2538-bsl.py -p
> "/dev/tty.usbserial-14200" --bootloader-invert-lines -e -w -v -b 460800
> {path_to_RIOT}/examples/gnrc_networking/bin/openmote-b/gnrc_networking.bin
> This did not work as the script for some reason was still taking the old
> port (i.e. tty.usbserial-xxxx0). So I manually copied the command and
> modified the flashing command to use port tty.usbserial-xxxx1:
> {path_to_RIOT}/dist/tools/cc2538-bsl/cc2538-bsl.py -p
> "/dev/tty.usbserial-14201" --bootloader-invert-lines -e -w -v -b 460800
> {path_to_RIOT}/examples/gnrc_networking/bin/openmote-b/gnrc_networking.bin
> I was successfully able to flash the code and able to use make term on
> this port. Hopefully this helps someone who is stuck in a similar situation.
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