3G Data Communication

IoT Modules General wireless topics
1

Hi, guys.
Anybody help please.
I have 3G module, MC8705 and pcb to connect with PC and SIM card.
I need to access data network using these but looks like can not access in unknown reasons.
The SIM card works well because data network accessible with 3G normal phone.
However, when I use SIM card with 3G module, can’t access data network.
It is Optus SIM card and that’s all I changed APN for the normal phone.

What I did for 3G module data network is :

  1. AT+CGDCONT=1,“IP”,“APN name same as normal phone”
  2. AT+CGDCONT=2,“IP”,“APN name same as normal phone”
  3. AT!RESET to reset

The problem is :

  1. AT+COPS?
    response : +COPS: 0

  2. AT+CREG?
    response: +CREG: 0,2

  3. I also can’t set value to +COPS and +CREG

  4. AT!GSTATUS?
    !GSTATUS:
    Current Time: 33511 Temperature: 23
    Bootup Time: 24052 Mode: ONLINE
    System mode: GSM PS state: Not attached
    WCDMA band: IMT2000 GSM band: GSM900
    WCDMA channel: 10700 GSM channel: 1
    GMM (PS) state:DEREGISTERED NO SERVICE
    MM (CS) state: IDLE NO SERVICE

Serving Cell: 0 (Unknown )
RX level (dBm):0.0
GPRS State: GPRS IDLE

looks like can’t access data network.
Here is Korea and the SIM was roaming from Austrailia.
So what else I should do or 3G module has some problem?
help me~

2

Hi,

Please check for the AT!SELRAT command.

Thanks.