RE: Buttonless DFU, secure format, SDK 12.1.0

Eliot Stock — Mon, 21 Nov 2016 11:06:09 GMT

Thank you. This is the clearest explanation of Nordic's intentions and the roadmap for DFU I've had so far. I can work with this.

RE: Buttonless DFU, secure format, SDK 12.1.0

Hung Bui — Fri, 18 Nov 2016 11:56:29 GMT

Hi Eliot,

The experimental buttonless DFU example on SDK v12.1 is pretty unmatured and we will update it.

Currently what it has is just a random 128bit UUID service (8E400001-F315-4F60-9FB8-838830DAEA50) with code in the example showing how you can jump to the bootloader after the characteristic is written 0x01 (checkout the on_write() function) .

It's pretty simple and straight forward. You can use your own 128 bit UUID service to do the same thing.

It's not native supported by our app (nRFToolbox and nRFConnect) you may want to implement the switching (enable CCCD and writing 0x01) process on your own app.

There is a small bug that write property is not enabled for the characteristic, you may want to add that in. Please see issue #3 in Newly found issue here.

After it switched to the bootloader, you do everything normally like when you update the DFU via bootloader.

RE: Buttonless DFU, secure format, SDK 12.1.0

Aleksander Nowakowski — Fri, 18 Nov 2016 08:21:28 GMT

My input to the topic: github.com/.../31