Connection issue with MC7455

c.marchetto · October 2, 2023, 3:00pm

Hi everyone,

I want to setup my MC7455 to use 4G on my computer. I’m with a Vodafone provider in Luxembourg and using the connection manager.

Right now the SIM card is definitely detected, but it’s endlessly searching for network… I really don’t know if I set it up wrong.

A few more info :

4836 generic drivers
vodafone firmware (latest)
profile : all set to default values (no username, no password)

Any help is appreciated.

Cheers

jyijyi · October 2, 2023, 3:07pm

what are the return of the followings?

ATi3
AT!entercnd=“A710”
at!impref?
at!band?
AT!selrat?
at+cpin?
at!gstatus?
at+cgdcont?
at+cfun?
at!uims?

BTW, does it work with the GENERIC PRI with latest FW?

c.marchetto · October 2, 2023, 5:53pm

Hi,

Returns from? (Sorry i am a noob)

It doesn’t work with the latest generic firmware no.

I should specify that i installed the generic drivers 4836 (latest drivers don’t work).

jyijyi · October 3, 2023, 1:10am

they are AT commands, you can open modem port (see in device manager) by tera term and enter those AT commands

c.marchetto · October 3, 2023, 6:27am

ATi3

Manufacturer: Sierra Wireless, Incorporated
Model: MC7455
Revision: SWI9X30C_02.24.03.00 r6978 CARMD-EV-FRMWR2 2017/03/02 13:36:45
MEID: 35457251218974
IMEI: 354572512189747
IMEI SV: 9
FSN: LQ238522430110
+GCAP: +CGSM

OK

AT!entercnd=“A710”

ERROR
Command error…

at!impref?

!IMPREF:
preferred fw version: 02.24.03.00
preferred carrier name: VODAFONE
preferred config name: VODAFONE_001.001_002
current fw version: 02.24.03.00
current carrier name: VODAFONE
current config name: VODAFONE_001.001_002

OK

at!band?

Index, Name
00, All bands

OK

AT!selrat?

!SELRAT: 00, Automatic

OK

at+cpin?

+CPIN: READY

OK

at!gstatus?

!GSTATUS:
Current Time: 302 Temperature: 42
Reset Counter: 10 Mode: ONLINE
System mode: LTE PS state: Not attached
LTE band: B20 LTE bw: 10 MHz
LTE Rx chan: 6300 LTE Tx chan: 4294967295
LTE CA state: NOT ASSIGNED
EMM state: Deregistered Attach Needed
RRC state: RRC Idle
IMS reg state: No Srv

PCC RxM RSSI: -98 RSRP (dBm): -140
PCC RxD RSSI: -60 RSRP (dBm): -88
Tx Power: 0 TAC: 0001 (1)
RSRQ (dB): -11.0 Cell ID: 000FDD67 (1039719)
SINR (dB): 8.4

OK

at+cgdcont?

+CGDCONT: 1,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

OK

at+cfun?

+CFUN: 1

OK

at!uims?

!UIMS: 0

OK

jyijyi · October 3, 2023, 6:29am

do you need to enter the APN for profile 1?
e.g
AT+CGDCONT=1,“IP”,“APN_test”

c.marchetto · October 3, 2023, 6:43am

AT+CGDCONT=1,“IP”,“APN_test” returns an error.

I don’t know if it answers your question though

jyijyi · October 3, 2023, 7:12am

be careful of the double quote character "

You already get error on AT!ENTERCND=“A710”

AT!entercnd="A710"

ERROR
Command error…

c.marchetto · October 3, 2023, 7:29am

With correct double quote :

AT!entercnd=“A710”
OK

AT+CGDCONT=1,“IP”,“APN_test”
ERROR
Command error…

jyijyi · October 3, 2023, 7:43am

I don’t see problem:


ati3
Manufacturer: Sierra Wireless, Incorporated
Model: MC7455
Revision: SWI9X30C_02.24.03.00 r6978 CARMD-EV-FRMWR2 2017/03/02 13:36:45
MEID: 35907206012345
IMEI: 359072060123456
IMEI SV:  9
FSN: LQ650440012345
+GCAP: +CGSM


OK
at!impref?
!IMPREF:
 preferred fw version:    02.24.03.00
 preferred carrier name:  VODAFONE
 preferred config name:   VODAFONE_001.001_002
 current fw version:      02.24.03.00
 current carrier name:    VODAFONE
 current config name:     VODAFONE_001.001_002

OK
at+cgdcont?
+CGDCONT: 1,"IPV4V6","","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0

OK
at+cgdcont=1,"IP","test"
OK
at+Cgdcont?
+CGDCONT: 1,"IP","test","0.0.0.0",0,0,0,0

OK
at!uims?
!UIMS: 0

OK
at+cfun?
+CFUN: 1

OK

c.marchetto · October 3, 2023, 7:56am

Any clue why it isn’t connecting?

Am I setting the profile wrongly in Skylight manager?

jyijyi · October 3, 2023, 8:06am

you can try to close skylight and see if you can modify profile

You can also try in linux PC and see if you can modify the APN

c.marchetto · October 3, 2023, 8:10am

I don’t know how I should define username, password, APN, etc.

jyijyi · October 3, 2023, 8:11am

did you check with network provider Vodafone?

c.marchetto · October 3, 2023, 8:26am

No I didn’t check with the network provider.

Which information should I get from them?

jyijyi · October 3, 2023, 8:27am

username, password, APN

c.marchetto · October 3, 2023, 9:23am

I got the information from the provider, but they were all correct.

What’s weird is that I have two other computers with exact same configuration and it works on those two computers, the only thing that changed is the firmaware.

On the two working computer, the firmware was installed a few years ago :
9999999_9904930_SWI9X30C_02.24.03.00_00_VODAFONE_001.001_000

but I can’t install it now on this new computer that I am trying to set.

It says “Firmware download failed”

I am thinking if we can reproduce the exact same configuration, it should work.

Any clue how I can install this older version of the vodafone firmware?

jyijyi · October 3, 2023, 9:29am

do you mean you have three MC7455 on three PC?

On the two working computer, the firmware was:
9999999_9904930_SWI9X30C_02.24.03.00_00_VODAFONE_001.001_000

On the NOK PC, the firmware of the MC7455 is SWI9X30C_02.24.03.00 with PRI
001.001_002.