what is the start_on_notify_cccd_handle in the ble_conn_params_init_t?

[JoonDong]

what is the start_on_notify_cccd_handle in the ble_conn_params_init_t?

I don't know why use this variable.

It seems to be used for conn_params_negotiation()... but isn't it an one of connection parameter?

[Petter Myhre]

If you want to start the connection parameter negotiation when a certain notification is enabled (when a certain CCCD is written to 0x0001), you can set the handle value of of that CCCD to start_on_notify_cccd_handle. If not, just set it to BLE_GATT_HANDLE_INVALID.

[JoonDong]

But, what does start_on_notify_cccd_handle do during connection parameter negotiation?

[Petter Myhre]

Nothing, but it can be used a trigger to start it.

[JoonDong]

does that mean connection parameter negotiation starts when notification occurs?

[Petter Myhre]

It means that connection paramter negotion starts when notifications are enabled.

[JoonDong]

Thank you. I confirmed it, analyzing code.