Updating via DFU on iOS when previously paired as HOGP/HID

[davman]

Hi,

Repro, using the Nordic hid-profile + iOS 7.1.1:

• Pair the nrf51822 based hid device via the iOS bluetooth menu.
• Turn off nrf-device.
• Boot up the nrf-device directly into DFU-mode.
• iOS will now instantly list it as connected in the bluetooth menu.
• as a result, the "iOS system" will steal the device (thinking it's still hid), making the custom dfu profile invisible for the nrf loader (OTA DFU update app).

Any ideas on how to solve this without requiring the user to first manually remove/"forget" the device under the iOS Preferences -> Bluetooth.

[Ulrich Myhre]

I'm no iOS expert, but you could try enabling and indicating the service changed changed characteristic upon reboot. This should tell the peer that the GATT DB layout is different, and that it needs to rediscovered.