Re: [PATCH BlueZ] core: Reduce RSSI delta threshold for RSSI property updates on Device1.

[Szymon Janc <szymon.janc@tieto.com>]

Hi Arman,

On Monday 29 of September 2014 15:16:04 Arman Uguray wrote:
> Currently the daemon does not update the RSSI property of a device object unless
> it sees a change of at least 8 dBm. This is too large for proximity use cases
> involving changes in distance within 4-5 feet. This patch reduces the threshold
> to 2 dBm to address this.
> ---
>  src/device.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/src/device.c b/src/device.c
> index 875a5c5..821549e 100644
> --- a/src/device.c
> +++ b/src/device.c
> @@ -4094,8 +4094,8 @@ void device_set_rssi(struct btd_device *device, int8_t rssi)
>  		else
>  			delta = rssi - device->rssi;
>  
> -		/* only report changes of 8 dBm or more */
> -		if (delta < 8)
> +		/* only report changes of 2 dBm or more */
> +		if (delta < 2)
>  			return;

I'm not sure if having this so small is good... ie those few devices I have
they tend to have ~4 dBm RSSI oscillation when just lying next to each other
on the desk.
  
>  		DBG("rssi %d delta %d", rssi, delta);
> 

-- 
Best regards, 
Szymon Janc