Data synchronization between two BLE peripheral devices with a mobile app as a central

RE: Data synchronization between two BLE peripheral devices with a mobile app as a central

Tai — Wed, 15 May 2024 22:18:50 GMT

Sorry for the late reply, Kenneth! Thanks for this suggestion. We're still working on this. Will keep you posted.

RE: Data synchronization between two BLE peripheral devices with a mobile app as a central

Kenneth — Tue, 09 Apr 2024 07:41:04 GMT

Hello again,

Maybe check out:
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/libraries/bluetooth_services/services/cts_client.html

Kenneth

RE: Data synchronization between two BLE peripheral devices with a mobile app as a central

Tai — Mon, 08 Apr 2024 20:22:50 GMT

Thanks Kenneth for the reply! I expect about the max 10ms delay.

You're right. I wanted to have some kind of timestamp on the data from the two BLE devices. Right now, data from each BLE device are transferred along with a timestamp using RTC, allowing to know the moment that each data is read out. However, could you elaborate your idea of using the mobile app to send out a time to each device? Any sort of diagram to illustrate that would greatly appreciate! Thanks!

RE: Data synchronization between two BLE peripheral devices with a mobile app as a central

Kenneth — Mon, 08 Apr 2024 11:48:23 GMT

Hello,

I am not sure what resolution and accuracy you need here, but I expect you need some kind of timestamp on the data from the two devices, since you can allways encounter retransmissions etc. Maybe it would be sufficient if the mobile app periodically send out a time to each device, and then the devices will use this timestamp to align their own timestamp when sending data to the mobile.

Kenneth