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Issues with m2m roaming card - What are my debugging options? | Thales IoT Developer Community

August 19, 2019 - 4:25pm, 3540 views

Hello,

I use a PLS8-E with an embedded Linux device. When I use a regular german post paid SIM, I have no problems registering with the network at all. Also, reconnections after lost coverage work perfectly fine.

When I use a pre paid m2m roaming card (it roams by default to offer all of Europe, vendor is Datamobile), it happens fairly often that the modem is not started properly after booting. It also happens that I loose connection permanently after a temporary loss of coverage.

When the modem does not come up properly, it fails in this step:

execute: PLS8 /etc/modems/service|/etc/modems/roaming
Which is either:

cat /etc/modems/roaming
ABORT BUSY
ABORT ERROR
'' AT+CREG?
'+CREG: 0,5'
or:

cat /etc/modems/service
ABORT BUSY
ABORT ERROR
'' AT+CREG?
'+CREG: 0,1'

I assume that the device does offer information on the issue it has occured, but I do not know what my debugging options are here. I just see that it has failed and that subsequently pppd will not be started due to the failure. How can I obtain more information on what is happening here?

Thanks. BR.