DFU over air failing

[Milko]

Hello, We are trying to implement a DFU with S110 V6 and SDK V5.2.0.39364. After starting the transfer procedure the nRF 51822 SoC restarts and disconnects. I tried out with both the MCP and the Toolbox 1.7 and 1.8 - results were the same. My phone model is a LG NEXUS 5 with Android 4.4.3. Could you possibly suggest to me something on how I can resolve this issue?

[John]

Sounds like you are tripping over an ASSERT of some sort in the nRF51822. You can use the debugger to catch the call to the assert handler and see which file, line number and error code you are getting. I went as far as adding the ble_debug_assert_handler to my ASSERT handler and setting a breakpoint in the assert handler function. You would want to disable the debug assert handler before shipping product.