I’m using Quectel BG77 with the Evaluation Board.
When I send AT+CEREG?, I always receive the same answer: +CEREG: 0,2
I’m using a Narrow Band SIM from “vodafone”. I have tested this SIM in other boards and it works well.
Does anyone know why I can’t register to the network?
Hi,
Can you execute the following commands to see the network configuration of the module?In addition, you can ask the following card vendors whether your card supports NB or CATM network format?
AT+QCFG=“BAND”
AT+QCFG=“NWSCANSEQ”
AT+QCFG=“NWSCANMODE”
AT+QCFG=“IOTOPMODE”
AT+QCFG=“servicedomain”
AT+COPS?
AT+COPS=?
Hi!
The output of the following commands is this:
AT+QCFG=“BAND”
+QCFG: “band”,0x0,0x100002000000000f0e189f,0x10004200000000090e189f
OK
AT+QCFG=“NWSCANSEQ”
+QCFG: “nwscanseq”,0203
OK
AT+QCFG=“NWSCANMODE”
ERROR
AT+QCFG=“IOTOPMODE”
+QCFG: “iotopmode”,2
OK
AT+QCFG=“servicedomain”
+QCFG: “servicedomain”,2
OK
AT+COPS?
+COPS: 0
OK
AT+COPS=?
+COPS: (1,“Movistar”,“Movistar”,“21407”,9),(1,“vodafone ES”,“voda ES”,“21401”,8),(1,“vodafone ES”,“voda ES”,“21401”,9),(1,“Movistar”,“Movistar”,“21407”,8),(1,“Orange SP”,“ESPRT”,“21403”,8),(1,“Orange SP”,“ESPRT”,“21403”,9),(0,1,2,3,4),(0,1,2)
OK
About our card, it supports NB.
Hi,
After checking, it should be caused by network configuration problems. After executing the following instructions, it should be able to stay in the network.
AT+CFUN=0
AT+QCFG=“NWSCANSEQ”,0302
AT+QCFG=“IOTOPMODE”,1
AT+CFUN=1
Hi,
After executing the following instructions, the problem still persists.
AT+CFUN=0
OK
AT+QCFG=“NWSCANSEQ”,0302
OK
AT+QCFG=“IOTOPMODE”,1
OK
AT+CFUN=1
OK
+CPIN: READY
+QUSIM: 1
+QIND: SMS DONE
AT+CEREG?
+CEREG: 0,2
OK
AT+COPS?
+COPS: 0
OK
Can you use QWINlog to grab a log and look at it?
Of course I can! I’ll send it to you
After the capture begins, execute the following 3 instructions in order to recapture.
AT+QCFG=“dbgctl”,0
AT+CFUN=0
AT+CFUN=1
I need to see the initial flow
Hi! In my evaluation board, I have managed to register to the network doing this:
AT+CEREG?
+CEREG: 0,0
OK
AT+COPS=?
+COPS: (1,“Movistar”,“Movistar”,“21407”,9),(1,“vodafone ES”,“voda ES”,“21401”,9),(1,“Orange SP”,“ESPRT”,“21403”,9),(0,1,2,3,4),(0,1,2)
OK
AT+COPS=1,2,“21401”,9
OK
AT+CEREG?
+CEREG: 0,5
OK
AT+COPS?
+COPS: 1,2,“21401”,9
OK
But in my HW design, it does not work:
AT+CEREG?
+CEREG: 0,0
OK
AT+COPS=?
+COPS: (1,“Orange SP”,“ESPRT”,“21403”,9),(1,“vodafone ES”,“voda ES”,“21401”,9),(1,“Movistar”,“Movistar”,“21407”,9),(0,1,2,3,4),(0,1,2)
OK
AT+COPS=1,2,“21401”,9
+CME ERROR: 30
AT+CEREG?
+CEREG: 0,0
OK
AT+COPS?
+COPS: 1
OK
1 Like
Failed with the BG77 network registration so far.
BG770 EG25-G and EC25-E work fine