MM v1.4.6/Telit HE910-D SMS question

[Aleksander Morgado]

On Mon, Aug 31, 2015 at 8:38 PM, Highland, Glenn
<Glenn.Highland at digi.com> wrote:
> Our device is running ModemManager v1.4.6 against a Telit HE910-D modem
> (rev. 12.00.024).  We’ve been quite successful
>
> in expediting data transfer via IP through the cell network (no problems
> there), but we’re having considerable difficulty
>
> getting SMS messages to be received by the device.  The signal strength
> being measured looks reasonable and since IP
>
> connectivity is quite reliable I don’t think it’s RF-related.
>
>
>
> I’ve been running ModemManager in debug mode and using mmcli.
>
>
>
> The issue I’m seeing is when the modem is enabled, ModemManager appears to
> be properly configuring the HE910-D
>
> for SMS handling (I see the AT+CNMI=”2,1,2,1,0” command being successfully
> executed to set-up new message indication
>
> handling and the default message storage is properly selected).  Running the
> AT+CSMS? command shows the mode is
>
> capable of sending/receiving SMS messages (as does AT+CSMS=0 and AT+CSMS=1).
>
>
>
> However, immediately after I successfully connect to the AT&T “i2gold” APN
> (mmcli –m 0 –simple-connect=”apn=i2gold”),
>
> I then re-query the New Message Indications configuration (AT+CNMI?) and the
> result is “0,0,0,0,0”.
>
>
>
> My question to the group is: Do you think it is the AT&T network that is
> causing the change in the New Message Indications
>
> configuration in the HE910-D?
>
>
>
> Any help/ideas would be appreciated.  I’ve attached a highlighted log to
> perhaps help illustrate.

While the modem is not connected all your commands go through ttyACM0.
When you connect the modem, ttyACM0 is used for PPP, so ModemManager
tries to use a secondary port, ttyACM3 in your case. Looks like the
reply is different in that one. Maybe we need to use a different port
flagged for "data", so that ttyACM0 is always used as primary.

Can you try to run through minicom the SMS related commands but using
ttyACM3 instead of ttyACM0, while the modem is not connected and
ModemManager not running? That's just to confirm whether ttyACM3
cannot be used as secondary.

-- 
Aleksander
https://aleksander.es