Start app from bootloader without updating?

[Agge]

Hi, stupid question here: Is there a command I could send via the dfu characteristics that starts the application somehow with doing an actual dfu update? Using the secure bootloader from sdk12

[bjorn-spockeli]

I would suggest that you implement a timeout as described in this or this answer. If the device enter bootloader mode, but there is no DFU activity, then the device should reset and go back to the application.