Most AT commands return ERROR

[flau]

Hi, I have a custom board built around a nRF9160.  All GPIO (P0.xx) work.  However, when I test with the at_client only AT+CGSN=1, AT+CGMI, AT+CGMM and AT+CGMR return with the expected string.  All other commands return "ERROR".  Any suggestions are very much appreciated.

[Albrecht Markus Schellenberger]

Hello Floyd,

are you able to successfully run through the Testing procedure of the AT Client sample? Could you provide me with a full application log of the result?

Regards,

Markus