Add BLE buttonless DFU service to custom application

[StevenW807]

Hi, in my custom nRF52805 peripheral application, I used Nordic NUS Service to transmit sensor's data. By using SDK17 example code <ble_app_buttonless_dfu>, I could OTA DFU for only 1 time. I mean, after finish uploading my custom firmware, the DFU button on the top right corner of the nRF Connect app disappears. (see 2 screenshots)

1) I believe that It's because when my custom firmware doesn't include the BLE buttonless DFU service. Is that right?

2) Is there any tutorial link to show me how to include the BLE buttonless DFU service in my custom application? 

3) Should I learn "add new BLE services" first, then learn "add BLE buttonless DFU service"? 

Thanks! 

[Einar Thorsrud]

Hi,

1) I believe that It's because when my custom firmware doesn't include the BLE buttonless DFU service. Is that right?

Yes, that is correct.

2) Is there any tutorial link to show me how to include the BLE buttonless DFU service in my custom application? 

There are no tutorial sowing specifically how to add Buttonless DFU service. However, you can look at the Buttonless DFU Template Application and copy the relevant parts from there.

3) Should I learn "add new BLE services" first, then learn "add BLE buttonless DFU service"? 

That is up to you. You may also be interested in this generic tutorial about merging BLE examples.