EG25GGB : not able to connect to network

Technical Subjects
1

Hi,

I am trying to connect to available network using EG25GGB (global module). However, I am sending following sequence of commands, and the response is given:

I (14705) esp-modem: write: AT
I (14705) esp-modem: read: AT
I (14765) esp-modem: read: OK

I (14765) esp-modem: write: ATE0
I (14815) esp-modem: read: ATE0
I (14865) esp-modem: read: OK

I (14865) esp-modem: write: AT+CGMR
I (14965) esp-modem: read: EG25GGBR07A08M2G

I (15065) esp-modem: read: OK

I (15065) esp-modem: write: AT+CGSN
I (15165) esp-modem: read: 867929063128427

I (15265) esp-modem: read: OK

I (15265) esp-modem: write: AT+CIMI
I (15365) esp-modem: read: 404**********343

I (15465) esp-modem: read: OK
I (19384) esp-modem: write: AT+CCID
I (19484) esp-modem: read: +CCID: 89*********************30

I (19484) MODEM-ICCID: +CCID: 89*******************30

I (19584) esp-modem: read: OK

I (19584) MODEM-ICCID: OK

I (19584) esp-modem: write: AT+CSQ
I (19684) esp-modem: read: +CSQ: 99,99

What sequence of commands shall I try?

Regards,
Kamlesh

2 
AT+CGDCONT?
AT+CGPADDR
AT+CEREG?
AT+QENG="servingcell"
AT+QMBNCFG="List"
3

Hi @snowgum ,

Here is the response for the above commands:

I (18445) esp-modem: write: ATE0
I (18495) esp-modem: read: ATE0
I (18545) esp-modem: read: OK

I (18545) esp-modem: write: AT+GMR
I (18645) esp-modem: read: EG25GGBR07A08M2G
I (18745) esp-modem: read: OK

I (18745) esp-modem: write: AT+CGSN
I (18845) esp-modem: read: 867929063128427
I (18945) esp-modem: read: OK

I (18945) esp-modem: write: AT+CIMI
I (19045) esp-modem: read: 40*********************43
I (19145) esp-modem: read: OK

I (19145) esp-modem: write: AT+COPS?
I (19245) esp-modem: read: +COPS: 0
I (19345) esp-modem: read: OK

I (19345) esp-modem: write: AT+CCID
I (19445) esp-modem: read: +CCID: 89*********************30
I (19545) esp-modem: read: OK

I (19545) esp-modem: write: AT+CSQ
I (19645) esp-modem: read: +CSQ: 99,99
I (19745) esp-modem: read: OK

I (19745) esp-modem: write: AT+CEREG?
I (19845) esp-modem: read: +CEREG: 0,2
I (19945) esp-modem: read: OK

I (19945) esp-modem: write: AT+CGDCONT?
I (20045) esp-modem: read: +CGDCONT: 1,"IPV4V6","","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
I (20105) esp-modem: read: +CGDCONT: 2,"IPV4V6","ims","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
I (20165) esp-modem: read: +CGDCONT: 3,"IPV4V6","SOS","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1
I (20275) esp-modem: read: OK

I (20275) esp-modem: write: AT+CGPADDR
I (20375) esp-modem: read: +CGPADDR: 1,"0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0"
I (20435) esp-modem: read: +CGPADDR: 2,"0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0"
I (20495) esp-modem: read: +CGPADDR: 3,"0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0"
I (20605) esp-modem: read: OK

I (20605) esp-modem: write: AT+QENG="servingcell"
I (20705) esp-modem: read: +QENG: "servingcell","SEARCH"
I (20805) esp-modem: read: OK

I (20805) esp-modem: write: AT+QMBNCFG="List"
I (20905) esp-modem: read: +QMBNCFG: "List",0,1,1,"ROW_Generic_3GPP",0x0501081F,202304121
I (20965) esp-modem: read: +QMBNCFG: "List",1,0,0,"VoLTE-ATT",0x0501033C,202203251
I (21025) esp-modem: read: +QMBNCFG: "List",2,0,0,"hVoLTE-Verizon",0x05010141,202302081
I (21085) esp-modem: read: +QMBNCFG: "List",3,0,0,"Sprint-VoLTE",0x05010205,202010201
I (21145) esp-modem: read: +QMBNCFG: "List",4,0,0,"Commercial-TMO_VoLTE",0x05010505,202301051
I (21205) esp-modem: read: +QMBNCFG: "List",5,0,0,"Telus-Commercial_DO",0x0580F601,202105061
I (21265) esp-modem: read: +QMBNCFG: "List",6,0,0,"Commercial-SBM",0x05011C18,202303021
I (21325) esp-modem: read: +QMBNCFG: "List",7,0,0,"Commercial-DT",0x05011F1C,202305311
I (21385) esp-modem: read: +QMBNCFG: "List",8,0,0,"Reliance_OpnMkt",0x05011B38,202003251
I (21445) esp-modem: read: +QMBNCFG: "List",9,0,0,"TF_Germany_VoLTE",0x05010C1B,202004151
I (21505) esp-modem: read: +QMBNCFG: "List",10,0,0,"TF_Spain_VoLTE",0x05010CFA,202212161
I (21565) esp-modem: read: +QMBNCFG: "List",11,0,0,"Volte_OpenMkt-Commercial-CMCC",0x05012071,202303133
I (21625) esp-modem: read: +QMBNCFG: "List",12,0,0,"VoLTE_OPNMKT_CT",0x050113FC,202301161
I (21685) esp-modem: read: +QMBNCFG: "List",13,0,0,"CU-VoLTE",0x05011508,202212271
I (21745) esp-modem: read: +QMBNCFG: "List",14,0,0,"Telstra-Commercial_VoLTE",0x0580079E,202211231
I (21805) esp-modem: read: +QMBNCFG: "List",15,0,0,"Commercial-KDDI",0x0501071D,202305251
I (21865) esp-modem: read: +QMBNCFG: "List",16,0,0,"Commercial-DCM",0x05010D17,202306071
I (21925) esp-modem: read: +QMBNCFG: "List",17,0,0,"Commercial-SKT",0x05012715,202212101
I (21985) esp-modem: read: +QMBNCFG: "List",18,0,0,"Commercial-KT",0x05012C0D,202211101
I (22045) esp-modem: read: +QMBNCFG: "List",19,0,0,"Commercial-LGU",0x05012626,202301171
I (22105) esp-modem: read: +QMBNCFG: "List",20,0,0,"Commercial-USCC",0x0504FC40,202203021
I (22165) esp-modem: read: +QMBNCFG: "List",21,0,0,"Optus-Commercial_VoLTE",0x05800CA2,201910241
I (22225) esp-modem: read: +QMBNCFG: "List",22,0,0,"STC_Saudi_VoLTE",0x0501FE01,201912231
I (22285) esp-modem: read: +QMBNCFG: "List",23,0,0,"Commercial-Rogers",0x05018821,202202091
I (22395) esp-modem: read: OK

I am trying to connect Airtel and Jio network. As you can see the SIM is connected and providing response. However, it is not registering with the network. What could be the possible cause?

Regards,
Kamlesh

4

You have no APN set for context 1 and you need to set it. Assuming “jionet” is the correct APN for your SIM, you can use this AT command (required once only):

AT+CGDCONT=1,"IPV4V6","jionet"

5

Hi @snowgum

Thanks for your prompt reply. After setting up the APN, also, I am not able to register to network. One thing is that I have soldered this EG25GGB module in place of EC200U-CN on my PCB. Is that okay? I’ve got information that both the pin to pin compatible. I am using the same antenna which I am using for EC200U-CN. Any issues here? Do I have to anything else for registering to the network. The APN “jiocnet” is working with EC200U-CN modems.

Regards,
Kamlesh

6

The command response is like below:

I (18394) esp-modem: write: AT
I (18394) esp-modem: read: AT
I (18454) esp-modem: read: OK

I (18454) esp-modem: write: ATE0
I (18504) esp-modem: read: ATE0
I (18554) esp-modem: read: OK

I (18554) esp-modem: write: AT+GMR
I (18654) esp-modem: read: EG25GGBR07A08M2G
I (18754) esp-modem: read: OK

I (18754) esp-modem: write: AT+CGSN
I (18854) esp-modem: read: 867929063128427
I (18954) esp-modem: read: OK

I (18954) esp-modem: write: AT+CIMI
I (19054) esp-modem: read: 405854706245462
I (19154) esp-modem: read: OK

I (19154) esp-modem: write: AT+CCID
I (19254) esp-modem: read: +CCID: 89918540507062390933
I (19354) esp-modem: read: OK

I (19354) esp-modem: write: AT+CSQ
I (19454) esp-modem: read: +CSQ: 99,99
I (19554) esp-modem: read: OK

I (19554) esp-modem: write: AT+COPS?
I (19654) esp-modem: read: +COPS: 0
I (19754) esp-modem: read: OK

I (19754) esp-modem: write: AT+CEREG?
I (19854) esp-modem: read: +CEREG: 0,2
I (19954) esp-modem: read: OK

I (19954) esp-modem: write: AT+CGDCONT?
I (20054) esp-modem: read: +CGDCONT: 1,"IPV4V6","jiociot","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
I (20114) esp-modem: read: +CGDCONT: 2,"IPV4V6","ims","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
I (20174) esp-modem: read: +CGDCONT: 3,"IPV4V6","SOS","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1

I’ve tried some more commands as given below with responses:

AT+CFUN?
+CFUN=1
OK


AT+CPIN?
+CPIN: READY
OK

AT+CGACT = 1,1
+CME ERROR: 30

ERROR 30 means “No Network Service”, however, Jio network is present. Could you please help here. I am running out of options.

Regards,
Kamlesh

7

Network registration is failing.

What mode are you running: AT+QCFG="usbnet"

8

hi @snowgum ,

Yes. registration is failing. this command is also failing.

AT+QCFG =“usbnet”
ERROR

I guess, I need to do like
AT+QCFG=“usbnet”, 1

But, what is this command needed for?

9

Make sure the right antenna is properly connected to the module, then (re)check with

AT+QENG="servingcell"
AT+QENG="neighbourcell"
AT+QCFG="band"
AT+QCFG="NWSCANMODE"

means that Received signal strength is

Not known or not detectable

means

Not registered, but MT is currently trying to attach or searching an operator to register to

Technically it is not a registration failure yet, your modem just cannot “see” a network.

10

Please do a network scan. The command AT+COPS=? is likely to take a minute or two to come back with a result.

11

Hi @jfrog ,

I tried what you mentioned here. All commands were successful however still I am getting CEREG: 0, 2, Hence the modem is unable to see the network.

12

waited for 2 minutes after AT+COPS=? command. getting no response, the command is timing out.

13

You need to copy/paste the results, nothing else.

14

Here is the response:

I (19364) esp-modem: write: AT+CSQ
I (19464) esp-modem: read: +CSQ: 99,99
I (19564) esp-modem: read: OK

I (19564) esp-modem: write: AT+COPS?
I (19664) esp-modem: read: +COPS: 0
I (19764) esp-modem: read: OK

I (19764) esp-modem: write: AT+CEREG?
I (19864) esp-modem: read: +CEREG: 0,2
I (19964) esp-modem: read: OK

I (19964) esp-modem: write: AT+QENG="servingcell"
I (20064) esp-modem: read: +QENG: "servingcell","SEARCH"
I (20064) SERVING CELL INFO: : +QENG: "servingcell","SEARCH"
I (20164) SERVING CELL INFO: : OK

I (20164) esp-modem: write: AT+QENG="neighbourcell"
I (20264) esp-modem: read: OK
I (20264) SERVING CELL INFO: : OK

I (20264) esp-modem: write: AT+QCFG="band"
I (20364) esp-modem: read: +QCFG: "band",0xbff,0x1e00b0e18df,0x0
I (20464) esp-modem: read: OK

I (20464) esp-modem: write: AT+QCFG="nwscanmode",0,1
I (20564) esp-modem: read: OK

I (20564) esp-modem: write: AT+COPS=?
15

@jfrog @snowgum Shall I try changing the band using: AT+QCFG="band",0xffff, 0x7FFFFFFFFFFFFFFF, 0, 1 to scan all the bands?

16

Looks like an RF issue to me. I would check pigtails, antennas, etc.
I think the bands you need are already enabled. Do you have any other device that could be used to test the reception?

17

Yes. I’ve got other devices as well. I tried, same thing is happening. not able to connect to the network. I’ve checked but again can you please confirm whether EC200-CN and EG25G are pin compatible?