I have two nRF52840 boards, how can I synchronize the system time of both?

[Higo]

I would like to synchronize the system time of two nRF52840 boards.

Thanks guys

[Kenneth]

Hello,

What SDK are you working on? What accuracy is your goal?

Kenneth

[Higo]

Hi Kenneth,

I would like to calculate the time it takes to send a message between two boards,

using the bt_gatt_write_without_response() method.

To do this, I would like to synchronize the times of both boards, or have a time stamp,

so that when I collect the sending time on board A and the receiving time on board B,

I can calculate and have the time it takes to send the message between both.

Thanks

[Kenneth]

Hi, please check out: 
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/radio_notification_cb/README.html#ble-radio-notification-conn-cb 

Kenneth