Change Connection Parameters on the Fly

[danbujak]

I'd like to be able to change the connection interval from my central device on the fly after a BLE connection has been established between it and the peripheral. What's the proper way to go about doing this? Is it possible without dropping the connection?

In one use case both devices are nRF51822, and in the other the peripheral is an nRF51822 while the central is an android device.

[Wojtek]

Sure it is. Just sd_ble_gap_conn_param_update.

[danbujak]

Thanks, I just amended the question to include use case 2 where the central is an android device.

[awneil]

Same question for nRF8001!

Is it similarly just a case of issuing a ChangeTimingRequest ?

[Dave_couling]

Be careful, I believe on Android, you are only allowed one Connection Parameter update per connection (Not sure if this has changed with the new OS). All subsequent Connection Parameter Update requests from the peripheral will be ignored by the phone.

-DC

[run_ar]

One option could be to use slave latency, this way you can have low latency from the slave to the master when needed, but you can have low power consumption on the slave when you don't need the fast connection interval. The master will still have to send a packet every connection event.