Do you supply a pre built hex for bootloader?
Hi,
There are some prebuilt hex files available in the SDK under, "BaseFolder\sdk\examples\dfu\ble_dfu_send_hex\test_images_update". Note that if you are using Master Control Panel to update your device with DFU you also need to bundle it in a .zip file with an init packet. More information can be found in the SDK documentation on running BLE bootloader example.