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Device is always in bootloader mode

Hi,

My device is always in bootloader mode, even if i flash the sample heart rate application it is not entering into the application. Actually, before it was working fine, i know that, if there is no valid application in the code region 1 the device should always in dfu mode, but after flashing a valid application like ble_app_hrs and ble_app_proximity, the device should enter into the application. I also checked this with the same device before, it was working fine, but now it is not working, So can anyone guess the source of the problem.

Regards, Balaji

bootloader_error.png

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  • Thanks for the response. Changing the bootloader did solve the problem that a DFU update is required.

    I also tried your points 2 and 3. When i tried to program the merged hex file with nRFgo Studio the following error occurs: Running application C:/Temp/nrf51Studio/nrfjprog.exe --snr XXXXXXXXX --program myimage.hex --reset ERROR: Attempted to write to UICR page while programming application..

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  • Thanks for the response. Changing the bootloader did solve the problem that a DFU update is required.

    I also tried your points 2 and 3. When i tried to program the merged hex file with nRFgo Studio the following error occurs: Running application C:/Temp/nrf51Studio/nrfjprog.exe --snr XXXXXXXXX --program myimage.hex --reset ERROR: Attempted to write to UICR page while programming application..

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