How to define event and event handler

[qoboty]

when I use softDevice S110, there exists ble_evt_dispatch function, Can I define event ? if I can, how to define event and how to use event handler . Thank you !

[shibshab]

The events come from the S110, and you can not define these events yourself.

To handle these event, set the handler function by calling softdevice_handler_set if you are using the softdevice handler from the SDK. If you are not using the softdevice handler from the SDK you can handle these events by calling sd_ble_evt_get directly.

[MartinBL]

Try to search for softdevice_ble_evt_handler_set();. This is the function used in SDK 9 to register the ble_evt_dispatch() event handler.

What do you mean exactly by "and the write characteristic operate will generate what events"? When you perform a write operation the GATT event "BLE_GATTS_EVT_WRITE" will be passed to ble_evt_dispatch()