The Open Bootloader example uses the Bootloader and DFU modules to implement a bootloader with Device Firmware Update (DFU) functionality. Open bootloader has relaxed security compared to the Secure Bootloader.
NRF_DFU_REQUIRE_SIGNED_APP_UPDATES
).NRF_DFU_REQUIRE_SIGNED_APP_UPDATES
).NRF_PROTOCOL_FW_VERSION_MSG
).The open bootloader example (examples/dfu/open_bootloader
) is provided only with USB CDC ACM DFU Transport.