RE: DFU again and again over BLE

John — Wed, 25 Jun 2014 12:09:43 GMT

If I understand your question properly it sounds like you want the DFU service exposed at the same time your application services are exposed. The DFU doesn't work that way, it is a stand alone project built separately from your application. See this question for more details:

DFU explanation

You also need to define a mechanism for entering DFU mode. The Nordic example uses a button held down at powerup. Here is another mechanism you could use:

DFU entry