Hello, my EC21-A on UMTS<E EVB KIt is not connecting to the network. I know the sim card works because I can connect to the network using a different module from another company.
Both blue lights light up and are steady when the board is powered up. This would seem to indicate the board is connected to the network property.
Then, when I plug in the USB cable the NET_MODE blue light goes out and the NET_STA light blinks very slowly.
I noticed another EC-21 post related to network issues (AU) that used a set of AT command to help diagnose the problem. I have included the output from these commands below.
Thanks for any assistance you can provide.
[2020-03-26 15:35:29:435_R:] OK
[2020-03-26 15:39:03:950_S:] ATI
[2020-03-26 15:39:03:954_R:] ATI
[2020-03-26 15:39:03:958_R:] Quectel
[2020-03-26 15:39:03:958_R:] EC21
[2020-03-26 15:39:03:958_R:] Revision: EC21AFAR02A05M4G
[2020-03-26 15:39:03:958_R:] OK
[2020-03-26 15:40:47:104_S:] AT+CSQ
[2020-03-26 15:40:47:110_R:] AT+CSQ
[2020-03-26 15:40:47:110_R:] +CSQ: 99,99
[2020-03-26 15:40:47:110_R:] OK
[2020-03-26 15:41:09:887_S:] AT+COPS?
[2020-03-26 15:41:09:893_R:] AT+COPS?
[2020-03-26 15:41:09:893_R:] +COPS: 0
[2020-03-26 15:41:09:893_R:] OK
[2020-03-26 15:41:22:983_S:] AT+QNWINFO
[2020-03-26 15:41:22:987_R:] AT+QNWINFO
[2020-03-26 15:41:22:987_R:] +QNWINFO: No Service
[2020-03-26 15:41:22:987_R:] OK
[2020-03-26 15:42:01:472_S:] AT+QCFG=“BAND”
[2020-03-26 15:42:01:479_R:] AT+QCFG=“BAND”
[2020-03-26 15:42:01:482_R:] +QCFG: “band”,0x260,0x80a,0x0
[2020-03-26 15:42:01:482_R:] OK
[2020-03-26 15:42:35:033_S:] AT+QCFG=“NWSCANMODE”
[2020-03-26 15:42:35:039_R:] AT+QCFG=“NWSCANMODE”
[2020-03-26 15:42:35:039_R:] +QCFG: “nwscanmode”,0
[2020-03-26 15:42:35:039_R:] OK
[2020-03-26 15:42:44:473_S:] AT+CFUN?
[2020-03-26 15:42:44:478_R:] AT+CFUN?
[2020-03-26 15:42:44:478_R:] +CFUN: 0
[2020-03-26 15:42:44:478_R:] OK
[2020-03-26 15:42:53:753_S:] AT+CREG?
[2020-03-26 15:42:53:758_R:] AT+CREG?
[2020-03-26 15:42:53:758_R:] +CREG: 0,0
[2020-03-26 15:42:53:758_R:] OK
[2020-03-26 15:43:02:454_S:] AT+CEREG?
[2020-03-26 15:43:02:459_R:] AT+CEREG?
[2020-03-26 15:43:02:459_R:] +CEREG: 0,0
[2020-03-26 15:43:02:459_R:] OK
[2020-03-26 15:43:31:515_S:] AT+QENG=“SERVINGCELL”
[2020-03-26 15:43:31:520_R:] AT+QENG=“SERVINGCELL”
[2020-03-26 15:43:31:520_R:] +QENG: “servingcell”,“SEARCH”
[2020-03-26 15:43:31:520_R:] OK
