Re: Implement signal strength polling in plugin/driver

[Guillaume Zajac <guillaume.zajac@linux.intel.com>]

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Hi Audric,

On 07/06/2012 17:20, Audric Schiltknecht wrote:
> Hi guys,
>
> It seems my first post was lost, so here is a new try.
>
> I am currently developing an ofono-based GSM control interface, using 
> a Sagem
> Hilo modem (I wrote the appropriate plugin) with the atmodem driver.
>
> I am having trouble with signal strength reporting. The terminal does 
> not report
> signal strength by event. Hence, it is not possible to get the value 
> from Ofono,
> since Ofono expects it to be updated on a +CIEV event. I implemented a
> new DBus method in the NetworkRegistration interface to force AT+CSQ 
> command and
> update the property value, but this is clearly not a valid solution.

Do you know in modem specifications if Sagem is using a specific signal 
strength notifications command?
If yes, then you should update in drivers/atmodem/network-registration.c 
the at_creg_set_cb() function to handle OFONO_VENDOR_SAGEM case.
Thus you can use register to the good comman notification.

Could you also give us your AT log and more particulary the 
"AT+CMER=3,0,0,1" answer?
Maybe, this configuration is not supported by your modem and you should 
change it.

>
> I found by looking in include/netreg.h that it should be up to the 
> plugin to
> implement CSQ polling, however I can't find how it is supposed to be 
> done.
> Indeed, the plugin has no access to the netreg atom nor structure, so 
> how is it
> supposed to update one of these properties ?

Indeed, if you use it for instance with ConnMan signal strength 
notification won't work or maybe I miss something.

Kind regards,
Guillaume