Re: CoreBluetooth - Whose RSSI reads ?
Re: CoreBluetooth - Whose RSSI reads ?
- Subject: Re: CoreBluetooth - Whose RSSI reads ?
- From: Scott Perry <email@hidden>
- Date: Wed, 29 May 2013 22:55:20 -0700
The former.
It's the signal strength of the advertisement packet as received by the central, normalized against the transmit power (which is a field in the advertisement packet). This normalization means that you're trusting the peripheral to not be lying about its transmit power (so you shouldn't trust RSSI for security through perceived proximity, which is a good guiding rule in wireless transmissions anyway :).
On May 28, 2013, at 1:52 PM, Alex B <email@hidden> wrote:
> Hi,
>
> The RSSI value read by the peripheral in CoreBluetooth, is the RSSI of the signal received by the iPhone from the peripheral, or the RSSI of the signal received by the peripheral from the iPhone (which is communicated back to the iPhone) ?
>
> Thanks !
>
> Alex
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