Re: Sierra Wireless 330u modem does not register

[Aleksander Morgado <aleksander lanedo com>]

> 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


-- 
Aleksander