RE: DFU works via Master Control Panel but not via nRF Toolbox

Stefan Birnir Sverrisson — Fri, 30 Oct 2015 14:20:14 GMT

Thank you for a very good and detailed description of your problem

I generated the bootloader zip file with the same nrf dfu genpkg ... string as you and it works fine.

Perhaps what is going on is that there is old bonding information residing on the phone. nRF51 SDK 7.2 bootloader does not handle that properly, as it advertises on the same GAP address as the application, making it use the same GATT table. It should work in nRF51 SDK 8.0.0+, where the bootloader advertises on a different GAP address, which results in the IOS to do a new service discovery for the bootloader and to refresh the GATT table.

Check if this makes it work: go to Settings -> Bloetooth on your IOS device, erase all pairing/bonding information and then turn off bluetooth and turn it on again. That should erase the old GATT table and force IOS to do a new service discovery when connecting.