[Ovmsdev] Any Telco engineers?

[felix bonnier]

mark,

 I will send you some further ideas on the UI which I think still needs some cleaning up, now that I actually have a working unit and can play with all the functions it has been a lot easier to immerse myself in the layout and depth of the app and it's settings

best

/fb

Sent from my iPad somewhere in our beautiful universe.......

On 19 Mar, 2012, at 22:25, Mark Webb-Johnson <mark at webb-johnson.net> wrote:

> 
> Any Telco engineers here?
> 
> I've been working on the iOS App code to convert the GSM signal strength indicator that comes back from the car into a 5 bar display and dBm value. There doesn't seem to be a standard for this, so I picked the iPhone 4.0.1 levels, as the reportedly the same as AT&T now use and at least I can compare with my iPhone.
> 
> Code looks like this:
> 
>   // car_gsmlevel comes back from the car as the output of AT+CSQ
>   // It is reportedly in the range 0..31, 99.
>   int car_gsmlevel = [ovmsAppDelegate myRef].car_gsmlevel;
> 
>   // Calculate dBm from AT+CSQ signal level
>   int car_gsmdbm = 0;
>   if (car_gsmlevel <= 31)
>     car_gsmdbm = -113 + (car_gsmlevel*2);
> 
>   // Tell the user about the dBm 
>   m_gsm.text = [NSString stringWithFormat:@"%d dBm",car_gsmdbm];
> 
>   // Calculate the signal bars 0..5
>   int car_signalbars = 0;
>   if ((car_gsmdbm < -121)||(car_gsmdbm >= 0))
>     car_signalbars = 0;
>   else if (car_gsmdbm < -107)
>     car_signalbars = 1;
>   else if (car_gsmdbm < -98)
>     car_signalbars = 2;
>   else if (car_gsmdbm < -87)
>     car_signalbars = 3;
>   else if (car_gsmdbm < -76)
>     car_signalbars = 4;
>   else
>     car_signalbars = 5;
> 
> Does that look ok, or can anyone with experience of this suggest anything better?
> 
> I've got a testflightapp build ready with this, and should be able to release tomorrow morning (my time). Just waiting for some device ids / testflightapp recruits to come in from interested developers who have eMailed me offering to help.
> 
> Regards, Mark.
> 
> P.S. The last 20120318 testflightapp build looks good. Crashes for the past 24 hours have gone to zero and things seem more stable.
> 
> _______________________________________________
> OvmsDev mailing list
> OvmsDev at lists.teslaclub.hk
> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
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