Custom AT command not recognized

[ec3 (EC)]

Using RUI3 with RAK3172 and RUI sensor node example. The AT+SENDFREQ command is not recognized, however it has initialized successfully

18438 [SETUP] Set Class A, Success
18588 [SETUP] Set the region: 5, Success
18691 [SETUP] Set the transmit power: 0 (30dBm), Success
18843 [SETUP] Set the channel mask: Success
18994 [SETUP] Channel mask is set to 0x0002
19098 [SETUP] Set the network OTAA enabled: 1, Success
19250 [SETUP] Set confirmed packets: 1, Success
19401 [SETUP] Add custom AT command AT+SENDFREQ, Success
19506 [SETUP] Add custom AT command AT+TST1, Success
19610 [SETUP] Waiting for Lorawan join...

however, when sending this command over UART2 it is not recognized. Another TST1 command is not recognized either. Can you recommend how to debug?

19:21:52.425 -> AT_ERROR
19:21:52.425 -> AT+SENDFREQ: Command not found!!
19:22:05.162 -> AT_ERROR
19:22:05.162 -> AT+SENDFREQ: Command not found!!
19:22:39.807 -> AT_ERROR
19:22:39.807 -> AT+SENDFREQ: Command not found!!
19:23:05.846 -> AT_ERROR
19:23:05.846 -> AT+SENDFREQ: Command not found!!

[beegee (Bernd Giesecke)]

Custom AT commands have the prefix ATC not AT

So you have to use ATC+SENDFREQ=? to access it.

Sorry, that part is not very clear in the documentation.

If you use AT? you can see the custom AT commands listed at the end.

[ec3 (EC)]

Thanks Bernd, that works. Perhaps an improvement to the error message in a future release, such as “Command not found, use ATC+ for custom commands…”