BG95M3 Network Registration Denied

IoT Modules LPWA Module
1

Hey all,

I’m testing out different carriers on a ESP32 MCU connected to a BG95M3 module. To make my life easier, I bought a usb dongle with a BG95M3 to do some preliminary testing.

I tested 3 different carriers: Soracom (roaming), Bell (home), and Telus (home), which all connect with no issue to the USB dongle. However when I tried testing the ESP32 only the Soracom sim cards would work, Bell and Telus gave me a Network Registration Denied when I ran AT+CREG?.

Additionally when I ran COPS=? on the ESP32 one to find see the operators available, I saw only Rogers (which Soracom connects to). When I ran this on the USB dongle I saw all of the operators I expected (Rogers, Bell, and Telus).

I’ve tried making sure all of the various QCFG configurations are the same on both devices, and I updated the firmware to the latest version.

Does anyone have any suggestions on what to try next? If you do that would be much appreciated.

Thank you

2

Hi @jk635

Firstly, If you are trying to register to LTE network, you should use AT+CEREG? to check network status, and due to there is no modem log, we dont know what happened when using Bell and Telus SIM. So, please help do following commands:

  1. When using Soracom SIM and network registered => AT+CEREG? / AT+QENG=“servingcell”
  2. When using Bell SIM and network denied => AT+QENG=“servingcell”, AT+QCFG=“emmcause”
  3. When using Telus SIM and network denied => AT+QENG=“servingcell”, AT+QCFG=“emmcause”
3

Hey @Linkin-Q thanks for getting back to me, below are the logs:

Soracom - USB Dongle (Connects)
AT+CEREG?
+CEREG: 0,5
OK

AT+QENG=“servingcell”
+QENG:
“servingcell”,“NOCONN”,“eMTC”,“FDD”,302,720,108B979,285,5060,12,3,3,59E7,-77,-7,-55,16,50
OK

Soracom - ESP32 (Connects)
AT+CEREG?
+CEREG: 0,5
OK

AT+QENG=“servingcell”
+QENG: “servingcell”,“CONNECT”,“eMTC”,“FDD”,302,720,108B979,285,5060,12,3,3,59E7,-106,-9,-81,19,
OK

Bell - USB Dongle (Connects)
AT+CEREG?
+CEREG: 0,1
OK

AT+QENG=“servingcell”
+QENG: “servingcell”,“CONNECT”,“eMTC”,“FDD”,302,610,BC63E06,239,5145,12,2,2,E292,-100,-17,-68,7,
OK

Bell - ESP32 (Does not connect)
AT+CEREG?
+CEREG: 0,3
OK

AT+QENG=“servingcell”
+QENG: “servingcell”,“SEARCH”
OK

AT+QCFG=“emmcause”
+QCFG: “emmcause”,14
OK