Hi guys, my name is Brenton. I am working with two "Samr21-xpro" boards. Whilst both boards were connected to the PC, whenever i tried to flash according to the /dev/ttyACMx ports, i received this error message "Error: more than one debugger found, please specify a serial number". I fixed this error by using this command "BOARD=samr21-xpro SERIAL="ATML2127031800002124" make flash". However, when using the command "sudo BOARD=samr21-xpro SERIAL=" ATML2127031800002124" make clean all *riotboot/flash*", i receive the same error.
I could disconnect 1 board, and program with only 1 board connected, but that's unproductive whilst debugging. Any ideas on how to fix this? With regards Brenton
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