how to synchronize nrf52840 (ble)

[lmouelo]

Hello, I want to synchronize several peripherals with a central, I already tried to do it with the state of the gpiote but I did not have the expected result at the level of the synchronization of the states, someone would it have another way to proceed to a synchronization  

[FormerMember]

What kind of synchronization do you want to do?

[lmouelo]

[FormerMember]

When having multiple connections, the softdevice takes care of the timeing. The "Connection timing as Central" chapter in the softdevice specification exaplins the topic very well.

[lmouelo]

i have an connection interval of 62.5 ms and aconnection events of 7.8 but the connection do that :   

peripheral 1->0->1->0->1->1->0

[FormerMember]

Could you explain what you mean by that sequence?

[lmouelo]

it's good i have the result that i want, but now i want to synchronize the timer of several peripheral card, how do we do that?

[lmouelo]

in my case I have 1 center and 4 peripherals, and a sensor.
The peripherals take the value of a sensor, and send them to the central.
So I want to synchronize the timer of the 4 peripherals to have the same sampling rate from the peripherals to the sensor.

[FormerMember]

I think the blog post "Wireless timer synchronization among nRF5 device" may be relevant for you.

(In addition, it may be useful to have a look at the "Current Time" example.)