Hi
We had some problems updating our devices with the nRF Loader App on IOS. After selecting the device in DFU mode the App hangs and aborts with a Bluetooth error after a timeout. As we already had tested, that the same App can update our devices we were quite confused. A lot of tests with various versions of our bootloader code didn't show a solution.
At the end we found out what causes the problem. If the device is paired with the IOS device the App hangs. When the the pairing is removed the App works as expected.
BR Adrian