Wismo Pac P5186D without IMEI


#1

Hi,

I just purchased a little black box with this module inside from a Hong Kong website. The module is placed onto a very small daughterboard with just a condenser mic on it and 7 solder pads, connecting to the serial port. My intentions are to use the module with a microcontroller.
I hooked the serial port to a CMOS-RS232 converter and inserted a SIM card which works, but the module does not connect to the GSM network.
A short test reveiled the following:

atd*#06#
012345678901234

It seems the module has an invalid IMEI! Is there a way to replace the IMEI with a valid one?

Thanks,

Ton


#2

Hiya,

Try getting the IMEI by using AT+WIMEI? at the modem command line.

Also, try the following tests:

  1. Does the Sim card need a pin (AT+CPIN? should return SIM READY)
  2. Check that you are connected to the network (AT+CREG? should return +CREG: 0,1)
  3. Check your signal strength (AT+CSQ)
  4. Finally, the GSM bands may not be setup correctly for the country you are in. Try AT+CGMM.

Finally, you should get the AT command guide from the Wavecom Products website (may need to register/login as a developer before download).

ciao, Dave


#3

Hi Dave,

Thanks for replying. I found out that when using a SIM card from a different provider (Which i already tried, this card is on another call plan) the unit works. The ‘not working’ issue is solved.

Leaves the question what will happen if more boxes share this strange IMEI and register in the same cell…

Here’s the output for the above AT commands:

ATI
 WAVECOM MODEM

 MULTIBAND  900E  1800

OK
AT+WIMEI?
+WIMEI: 012345678901234

OK
AT+CREG?
+CREG: 0,1

OK
AT+CSQ
+CSQ: 19,0

OK
AT+CGMM
 MULTIBAND  900E  1800

OK

Thanks,

Ton.


#4

Hello,
is there a Datasheet for this old device somewhere ? It is really cheap and easy to get for preliminary testing of idea’s. Further detailed development can be surely done via a newer chip, but for single samples they are way harder to get.

So a Datasheet or at least pinout can help !
greets,
hansman


#5

You can set IMEI by yourself :slight_smile:
The number can be generated randomly or taken from some wavecom distributor.