Troubleshooting • Error on setting up 4G modem: couldn’t start network: QMI protocol error (14)

Hey,
I’m trying to connect the raspberrypi to 4G LTE network using qmi, and I’m getting this error when I’m trying to set the apn, username and password.
The command that i’ve entered is,
sudo qmicli -p -d /dev/cdc-wdm0 --device-open-net=‘net-raw-ip|net-no-qos-header’ --wds-start-network=“apn=‘airtelgprs’,username=’ ‘,password=’ ',ip-type=4” --client-no-release-cid

error: couldn’t start network: QMI protocol error (14): ‘CallFailed’
call end reason (1): generic-unspecified
verbose call end reason (6,55): [3gpp] multiple-connection-to-same-pdn-not-allowed
[/dev/cdc-wdm0] Client ID not released:
Service: ‘wds’
CID: ‘24’
I’ve tried multiple combinations of the apn like ‘airtelgprs.com’ etc and none of them seems to work. I’ve verified that the SIM is working fine, by checking it in a smartphone. The apn that is shown in the smartphone settings is also ‘airtelgprs’.

I’m also adding the AT commands,

at+cpin?
+CPIN: READY

OK
at+cops?
+COPS: 0,0,“IND airtel airtel”,7

OK
at+creg?
+CREG: 0,5

OK
at+csq
+CSQ: 25,99

OK

The ModemMana service is occupying the ttyUSB3 to which i’ve connected the 4G hat from the boot itself. I’m killing the service every time to give the qmi commands.
Anyone encountered similar errors like ‘multiple-connection-to-same-pdn-not-allowed’?

Regards,
Febin.

Statistics: Posted by febin-zcs — Thu May 02, 2024 7:29 am

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