[riot-users] Programming with multiple boards connected to laptop

Brenton Chetty brent7984 at gmail.com
Tue May 14 08:53:59 CEST 2019

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

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
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