Is there any other way then by going through:
ttnctl --app-id app_nr_1 devices list ... ttnctl --app-id app_nr_12 devices list
and parsing the output to determine if a device is already registered?
I’ld like to omit the need to reinstall a device at its former location after battery change.
By the way: There’s no switch for ttnctl to get a more machine parsable output, isn’t it?