Implementing Buttonless DFU w/ SDK12

[jr]

We're looking to implement buttonless DFUs with the NRF52 and are a bit confused how to send 0x01 to the control point of the service. Is this a control point that is already made accessible via a BLE service in the SDK implementation?

Currently I am trying to connect to write the value '0x01' to the characteristic of the service with the UUID 8E400001-F315-4F60-9FB8-838830DAEA50 (integrated into our application from the demo buttonless one) over BLE, but am getting an error that "Writing is not permitted." and think that I may be going about this in the completely wrong way, but am a bit confused as the documentation is pretty sparse: infocenter.nordicsemi.com/index.jsp

Is it possible to get a bit of elaboration on how this can be implemented?

[dav lion]

You may need to make a slight change to the example code to allow writing to that characteristic. See devzone.nordicsemi.com/.../

[Hung Bui]

@jr: dav lion is correct. You would need to add write properties to the DFU buttonless characteristic. Please add char_md.char_props.write = 1; in rx_char_add() in ble_dfu.c