Time synchronization between nRF52 and Android 7 device

[bhavik.kothari]

Hi,

I have a setup where one nRF52 based device is a master and generating a time pulse with a counter. On another side, I am having Android device with QCA6174A module as a bluetooth. This Android device will play a role of slave and receive a time sync pulse to update the clock. 

Can I use nRF connect application which can receive time pulse from master and can provide data on Android side? Or is there any application or other way available to update a time on Android which is shared by nRF52 module?

Please do let me know if you need any other details.

I will look forward to your response.

Thanks in advance!

Bhavik

[Bulhar]

Hi Bhavik, what is required time accuracy?

[bhavik.kothari]

Hi,

Require time accuracy is lesser than 1 ms.

Thanks,

Bhavik

[Bulhar]

It seems to me that is too high for implementing over BLE. One thing is data propagation delay and the other thing is processing delay on Android device. Both could vary during attepmts. Why not use GPS receiver on Android device?

[bhavik.kothari]

Thanks for your inputs Bulhar.

I would like to use BLE only for time synchronization. I do not want to use GPS receiver. First of all I would like to confirm whether Android device can receive a time pulse generated by another device which is having nRF52 module. If yes then will measure a latency. Time accuracy is not a priority to me, however time synchronization between nRF52 and Android device is important.

[Bulhar]

From my point of view, at least you will get notification about characteristic value update wich is part of service. I have no idea about processing delay. For time sync would be better to use lower radio layers, but these are not accessible.