Device Not Staying in DFU Mode

[jmkusters]

My device is entering DFU mode, staying there for a few seconds, then shutting down. I'm trying to figure out a good way to figure out if it's a watchdog issue or a power supply issue. The device works totally fine outside of this DFU problem.

[Einar Thorsrud]

As you mention the watchdog I wonder if you ever enable the watchdog in your application? If so, you must keep feeding it in the bootloader, or alternatively set a very long timeout. Can you verify that the watchdog is the issue by seeing if the problem goes away if you don't enable it in your application? I also want to mention that Watchdog timer support has been added in SDK 15.