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dominiv2604's picture
dominiv2604

November 24, 2021 - 6:58pm, 2163 views

Hello,

I created project based on BGS2-E module, but one of my product come back to me with weird problem.

In my project, I based on automatic network searching but this one piece, can't connect with any network. I tried do it manually by command:

AT+COPS=1,2,(number of network)

and then, terminal show me OK, but when i check network connection status using

AT+CREG?

I still receive,

+CREG: 0,2

 

Another products, haven't that problem - they connect manually, and automatic too.

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Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Nov 25 2021 - 3:58pm

Hello,

Please do some cross checks like switching the SIM. And verify if the antenna is connected.
Please activate some CREG URC with AT+CREG=2 and maybe some URCs with AT^SIND. Check AT+CEER output. Check with AT+COPS=? what networks the module can find. Please also paste AT^SCFG? output.

BR,
Bartłomiej

dominiv2604's picture
dominiv2604
Nov 26 2021 - 12:04pm

Hi, thanks for response! ;)

okey, from the beginning...

I tested, module on a few sim card's and effect was always the same.

Antenna is connected properly, (I based that, on AT+CSQ command, which return me about 20).

AT+COPS=?
+COPS: (1,"Orange PL",,"26003"),(1,"Plus",,"26001"),(1,"T-Mobile.pl",,"26002"),,(0-4),(0,2)

I tried connect to all this sites, without success. I had card from "Orange", and I tested to connect "Orange PL" too, similar with Plus site.

 

AT^SCFG?
^SCFG: "Audio/AMR","enabled"
^SCFG: "Audio/Loop","0"
^SCFG: "Call/ECC","0"
^SCFG: "Call/SpeechVersion1","0"
^SCFG: "GPRS/ATS0/withAttach","on"
^SCFG: "GPRS/AutoAttach","disabled"
^SCFG: "GPRS/RingOnIncomingData","off"
^SCFG: "MEop****/CregRoam","0"
^SCFG: "MEop****/JamDet/If","0"
^SCFG: "MEop****/JamDet/LstaNo","40"
^SCFG: "MEop****/JamDet/LstaVar","10"
^SCFG: "MEop****/JamDet/LstaMean","40"
^SCFG: "MEop****/PingRsp","1"
^SCFG: "MEShutdown/Fso","0"
^SCFG: "PowerSaver/****9/Timeout","20"
^SCFG: "Radio/Band/HandOver","0"
^SCFG: "Radio/CS/Timer","30"
^SCFG: "Serial/Ifc","0"
^SCFG: "Tcp/IRT","3"
^SCFG: "Tcp/MR","10"
^SCFG: "Tcp/Nagle","on"
^SCFG: "Tcp/OT","6000"
^SCFG: "Tcp/WithURCs","on"
^SCFG: "URC/CallStatus/CIEV","restricted"
^SCFG: "URC/CallStatus/SLCC","verbose"
^SCFG: "URC/Datamode/Ringline","off"
^SCFG: "URC/Ringline","local"
^SCFG: "URC/Ringline/ActiveTime","2"

 

AT+CEER
+CEER: 0,0,0

 

AT^SIND?
^SIND: battchg,1,5
^SIND: signal,1,99
^SIND: service,1,0
^SIND: sounder,1,0
^SIND: message,1,0
^SIND: call,1,0
^SIND: roam,1,0
^SIND: smsfull,1,0
^SIND: rssi,1,4
^SIND: audio,0,0
^SIND: vmwait1,0,0
^SIND: vmwait2,0,0
^SIND: msclass,0,10
^SIND: ciphcall,0,1
^SIND: eons,0,0,"",""
^SIND: nitz,0,"",+00
^SIND: simdata,0
^SIND: satevent,0
^SIND: steerroam,0
^SIND: simtray,0,1
^SIND: is_cert,0
^SIND: dtmf,0,1,50,0,0
^SIND: voiceprompt,0,0
^SIND: lsta,0,0
^SIND: JamDet,0,0
^SIND: ceer,0

 

Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Nov 26 2021 - 2:18pm

Hello,

Do these SIM cards work in other device or have you tried the same SIM that works in some other BGS2 device?
As AT+COPS=? returns networks it seems that the antenna must be working. All the networks have status 1 which is available. If you try to force the forbidden operator it would probably change to 3 for this operator which is forbidden. This module returns always OK after manual operator selection and then tries to connect. Please activate CREG URC with AT+CREG=2. You will see the status changing.
If at+csq returns rssi other than 99 it looks like the module is registered but maybe in limited service ****. But this usually happens when the operator is forbidden. If CREG is 3 the registration was denied by the network. Please also check AT^MONI output. Please also check AT+CFUN? output.
Was this module ever proved working before? 

BR,
Bartłomiej

dominiv2604's picture
dominiv2604
Nov 29 2021 - 3:36pm

Hi,

Do these SIM cards work in other device or have you tried the same SIM that works in some other BGS2 device?

Yep, both sim card's works well on my phone, and on other bgs2e devices.

 

As AT+COPS=? returns networks it seems that the antenna must be working. All the networks have status 1 which is available. If you try to force the forbidden operator it would probably change to 3 for this operator which is forbidden.

 

When, I force to connect to any network, status of this network not changing, it still is "1" - Avaliable.

 

This module returns always OK after manual operator selection and then tries to connect.

Allright.

 

Please activate CREG URC with AT+CREG=2. You will see the status changing.

I activated that, but I don't have any URC, see:

AT+CREG=2
OK
AT+COPS=?
+COPS: (1,"Orange PL",,"26003"),(1,"T-Mobile.pl",,"26002"),(1,"Plus",,"26001"),,(0-4),(0,2)

OK
AT+COPS=1,2,26003
OK
AT+CREG?
+CREG: 2,2

OK

 

Yep, the AT+CSQ command return rssi value other than 99:

at+csq
+CSQ: 19,99

 

My +CREG, still return me 2, that means:

Not registered, but ME is currently searching for a new operator
ME searches for an available network. Failure to log in until after more than a

 

AT^MONI

at^moni
Serving Cell                                          I Dedicated channel
chann rs  dBm MCC MNC  LAC cell NCC BCC PWR RXLev  C1 I chann TS timAdv PWR  dBm Q ChMod
120   35  -75 260  03 DD90 AB37   6   5  33  -106  31 I    Limited Service

 

CFUN:

at+cfun?
+CFUN: 1

 

Was this module ever proved working before?

Unfortunately I don't have that information.

Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Nov 30 2021 - 11:17am

Hello,

The module is able to scan the networks and shows limited service, so the receiver is working. Maybe there is a hardware issue with the transmitter. If everything was correct with both transmitter and receiver you would be able to setup an emergency call. 
Or maybe there's something with the software. Anyway to debug this you'd have to capture traces from the module which you are not able to do. 
Did you use the AT+CLCK command? Maybe some kind of lock is applied. Was the module brand new? If so, please contact your provider.

BR,
Bartłomiej

dominiv2604's picture
dominiv2604
Dec 6 2021 - 6:27pm

I don't use AT+CLCK command.

Yep, module is brand new.

If everything was correct with both transmitter and receiver you would be able to setup an emergency call.

If i want to setup an emergency call, i will use

ATD112;

right?

Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Dec 7 2021 - 2:29pm

Yes. I don't recommend you to do that but if it worked, that would be a proof that from HW perspective the device is able to communicate.