I'm using the NRF9160DK, the asset_tracker example works fine over Cat-M together with the iBasis sim.
I want to run my applications on NB-IoT, so I'm trying to connect the DK over NB-IoT, but it doesn't seem to work. It feels like I'm missing a config, but I'm not sure which one.
I'm in North CA in the US, iBasis states NB-IoT should work here.
AT-host example output with iBasis sim:
*** Booting Zephyr OS build v2.1.99-ncs1-1145-g13dc96f83bab *** The AT host sample started AT%XSYSTEMMODE? %XSYSTEMMODE: 0,1,0,0 OK AT+CFUN? +CFUN: 0 OK AT+CFUN=1 OK AT+CFUN=1 OK AT+CFUN? +CFUN: 1 OK AT+CGMI Nordic Semiconductor ASA OK AT+CGMM nRF9160-SICA OK AT+CGMR mfw_nrf9160_1.2.0 OK AT+CEMODE?+CEMODE: 0 OK AT%XCBAND=? %XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66) OK AT+CMEE? +CMEE: 0 OK AT+CMEE=1 OK AT+CNEC? +CNEC: 0 OK AT+CNEC=24 OK AT+CGEREP? +CGEREP: 0,0 OK AT+CGDCONT? OK AT+CGACT? OK AT+CGEREP=1 OK AT+CIND=1,1,1 OK AT+CEREG=2 OK AT+CEREG? +CEREG: 2,0,"FFFE","FFFFFFFF",9 OK AT%CESQ=1 OK AT+CESQ+CESQ: 99,99,255,255,255,255 OK AT%XSIM=1 OK AT%XSIM? %XSIM: 1 OK AT+CPIN? +CPIN: READY OK AT+CPINR="SIM PIN" +CPINR: "SIM PIN",3 OK AT+CIMI 204080813516911 OK AT+CEREG=5 OK %CESQ: 61,3,23,3 +CEREG: 2,"EBB6","0144D3C8",9,0,0,"11100000","11100000" +CNEC_EMM: 11 +CEREG: 2,"EBB6","0144D3C8",9,0,11,"11100000","11100000" %CESQ: 61,3,16,2 %CESQ: 55,2,11,1 +CEREG: 2,"8C3C","0A18483B",9,0,11,"11100000","11100000" +CNEC_EMM: 15 +CEREG: 4,"8C3C","0A18483B",9,0,15,"11100000","11100000" %CESQ: 255,0,255,0 +CEREG: 4,"FFFE","FFFFFFFF",9,0,15,"11100000","11100000" %CESQ: 74,3,18,2 +CEREG: 2,"2080","00808C14",9,0,15,"11100000","11100000" +CNEC_EMM: 15 +CEREG: 4,"2080","00808C14",9,0,15,"11100000","11100000" %CESQ: 255,0,255,0 +CEREG: 4,"FFFE","FFFFFFFF",9,0,15,"11100000","11100000" %CESQ: 75,3,18,2 +CEREG: 4,"2080","00808C14",9,0,15,"11100000","11100000" %CESQ: 75,3,23,3 %CESQ: 70,3,23,3 AT+COPS=? +CME ERROR: 0 AT+COPS? +COPS: 0 OK AT%COPS=? %COPS: (3,"","","310260",9),(1,"","","311480",9),(1,"","","310410",9) OK AT+COPS=? +CME ERROR: 0
note the `AT+COPS=?` and `+CME ERROR: 0` here. Why am I getting this error, and why does `AT%COPS=?` work instead?
AT host example output with T-mobile sim. This sim works on NB-IoT in a different brand modem, so I'm sure it's not a network issue:
*** Booting Zephyr OS build v2.1.99-ncs1-1145-g13dc96f83bab *** The AT host sample started AT+CFUN? +CFUN: 0 OK AT+CFUN=4 OK AT%XSYSTEMMODE? %XSYSTEMMODE: 0,1,0,0 OK AT+CFUN=1 OK AT+CFUN? +CFUN: 1 OK AT+CGSN=1 +CGSN: "352656100381287" OK AT+CGMI Nordic Semiconductor ASA OK AT+CGMM nRF9160-SICA OK AT+CGMR mfw_nrf9160_1.2.0 OK AT+CEMODE? +CEMODE: 0 OK AT%XCBAND=? %XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66) OK AT+CMEE? +CMEE: 0 OK AT+CMEE=1 OK AT+CNEC? +CNEC: 0 OK AT+CNEC=24 OK AT+CGEREP? +CGEREP: 0,0 OK AT+CGDCONT? OK AT+CGACT? OK AT+CGEREP=1 OK AT+CIND=1,1,1 OK AT+CEREG=2 OK AT+CEREG? +CEREG: 2,0,"FFFE","FFFFFFFF",9 OK AT%CESQ=1 OK AT+CESQ +CESQ: 99,99,255,255,255,255 OK AT%XSIM=1 OK AT%XSIM? %XSIM: 1 OK AT+CPIN? +CPIN: READY OK AT+CPINR="SIM PIN" +CPINR: "SIM PIN",3 OK AT+CIMI 310240200018620 OK AT+CEREG=5 OK AT%XAPNSTATUS? %XAPNSTATUS: OK AT+COPS=? +COPS: (1,"","","310260",9),(1,"","","310410",9),(1,"","","311480",9) OK +CEREG: 2,"FFFE","FFFFFFFF",9,0,0,"11100000","11100000"
Here `AT+COPS=?` seems to work, but it kind of gives up immediately on connecting?
Am I missing a config somewhere / what can I do to debug this?
Thanks for the help!
