Re: Sierra Wireless 330u modem does not register




I have an ARM device that I'm trying to make use a Sierra Wireless 330U
to connect to Bell Canada. I'm working on getting ModemManager on the
device, but I'm fighting cross-compilation issues.

Until then, I'm trying to connect it manually and I'm having trouble.

First, when putting the modem in a Windows laptop or a Cradlepoint
device, it registers and connects almost immediately, so the SIM is fine
and it's in a serviceable area. Also, this device works with other
modems, including the very similar Sierra Wireless 313U, so the USB port
is fine.
The modem is not registering with the network. +CEREG? gives 0,2 (or I
can set CEREG=2 to get notifications, and it gives me 2,2). +CREG and
+CGREG also give me a 2.
+CFUN is 1. Setting it to 0 and back to 1 doesn't cause it to register.
+CPIN? returns "+CPIN: READY", which (I believe) means it doesn't need a
PIN for the SIM.
The APN is setup as either pda.bell.ca or inet.bell.ca (I'm trying both)
using +CGDCONT in context id 1; there is no username or password needed.
(although I don't think this stuff matters - it should register anyway)
Attempting to attach to the packet service using AT+CGATT=1 just hangs
for a while before returning OK.

First: do you have your antenna connected? :)

Second: Maybe try to tell the modem to connect to the home network? If
using minicom to talk to the modem directly, use:
   AT+COPS=0
if using MM git master with mmcli you can use:
   $> mmcli -m # --3gpp-register-home
It shouldn't need an external antenna if it connects with no problem on
the laptop.


Ah, it's a USB modem already, thought it was a minipci device.

+COPS=0 returns OK and it still never registers.
+COPS=? gives back just a list of forbidden operators as follows; I
don't see any available operators.
+COPS:
(3,"AT&T","AT&T","310410",2),(3,"AT&T","AT&T","310410",0),(3,"T-Mobile","TMO","31026",0),(3,"T-Mobile","T-Mobile","310260",2),,(0,1,2,3,4),(0,1,2)


Weird, did you try the same command from the Windows laptop where you
can connect? Just wondering if you get an allowed operator listed there.

-- 
Aleksander


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