[LoRaWAN] Getting the mbed stack into test / certification mode?

Hi,

I expected the LoRaWAN reference example to honor the port 224 command to go into test mode.

It does seem to intercept received messages to port 224 (they don’t show up as received in the reference output) but the behaviour doesn’t change into the expected test / certification mode operation.

Is there some special trick to enable test / certification mode? Stuck.

Thanks,
-mark.