about broadcast (nrf52840, sdk15.0)

[lmouelo]

hello, i have a question about broadcast mode : 

can the broadcast mode be used in parallel with the ble mode? 

thank you.

[Edvin]

There is no such thing as "broadcast" in BLE. But you can forward the data to the 4 peripherals. The reason for why a broadcast doesn't work is because the central has a specific timeslot for each peripheral, where that peripheral will turn on the radio in receiver mode, and these timeslot do not overlap.

 

If you look into the examples:

SDK\examples\ble_central\ble_app_multilink_central for the central

and

SDK\examples\ble_peripheral\ble_app_blinky for the peripheral(s)

 

You can see that the central has a sort of "broadcast" where it sends a message to all of the peripherals on a button press. I say "broadcast" because it doesn't send one message that all the peripherals picks up at the same time, but it sends the message to each peripheral.

 

Best regards,

Edvin

[lmouelo]

okay so to send exactly at the same time (broadcast) I can't use ble, I have to use the radio role?