"No bootloader was found" ERROR MESSAGE WHILE FLASHING BUTTONLESS DFU EXAMPLE CODE

[siltvm]

Hi,

We are working on a project using the nRF52832, which utilizes UART for a QR-code sensor, I2C for an OLED display, and SPI for external flash memory.

We are at the final stage of development and facing an issue with OTA DFU (Over-the-Air Device Firmware Update) integration. When flashing the example code for buttonless DFU onto the development board, the compilation completes without errors. However, the debug terminal shows the following error messages:

<error> app: No bootloader was found
<error> app: Fatal error
<warning> app: System reset

Are there any known issues with the buttonless DFU example code? Is there any modification needed, such as changing the flash memory address, when flashing the ble_buttonless_dfu example code?

Details:

• IDE: SES v5.42a
• SDK version: 17.0.2
• Development board: nRF52832 PCA10040

[Vidar Berg]

Hi,

The buttonless application requires a bootloader to be present, and the bootloader must be programmed separately. Please refer to the "Combine application, bootloader and softdevice image - Bootloader setting" section of this tutorial  Getting started with Nordic's Secure DFU bootloader, a step by step guide for instructions to create the bootloader settings page to make the application bootable by the bootloader.

Best regards,

Vidar 

[siltvm]

Hi Vidar Berg,

Thanks a lot for the valuable information. I studied and went through the tutorial link you shared. It helped me a lot to understand and implement over-the-air device firmware updates in my project.