On Tue, Sep 11, 2018 at 4:29 PM WenZhan Song <[email protected]> wrote:
>
> Robert,
>
> Thank you for replying our questions! To be clear, what we intend to do is: 
> we want to design a time synchronization protocols among a group of BBBWs 
> using the bluetooth radio in BBBW, with the goal to achieve 10 us accuracy. 
> Thus, we want to program PRU to send and receive bluetooth messages with 
> low-level timestamping for that accuracy. The hypothesis is that ARM with 
> Linux perhaps has too much uncertainty and delay while PRU can reduce that.

and "how" exactly is the PRU going to reduce that? It doesn't control
the radio directly...

> Is this possible? If not, do you happen to know any mature way to achieve 10 
> us accuracy with Bluetooth or WiFi radio. I currently use GPS but it does not 
> work well indoor.

PS, If you look at:

http://blog.bluetooth.com/exploring-bluetooth-5-how-fast-can-it-be

It would be better to just use a Bluetooth 5 usb dongle..

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

-- 
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