The DFU operation scenario.

[jsna]

HI.

nRF51 is inexperienced users.

I've downloaded using nRFgo Studio.

Preparation before the test to dfu.

1. nRF51_SDK_10.0.0

   1. Components\softdevice\s110\hex

      • s110_nrf51_8.0.0_softdevice.hex

   2. dfu\bootloader\pca10028\dual_bank_ble_s110\arm4_build

      • nrf51422_xxac.hex

   3. After building the application, it has been downloaded(using nRFgo Studio).

      • ble_app_uart_dfu.hex

   4. I have created a zip file that want to upgrade.

      • Creating an image file

   5. nRF Toolbox

      • When the button is pressed(SELECT DEVICE), The name seemed "DfuTarg". Finally, I downloaded a uart application(ble_app_uart_dfu.hex), I think there seems to be marked with the "Nordic_UART". Why does this name does not look Nordic_UART?

Thank you.

[Michael Dietz]

Short answer: Things get cached a lot with BLE. You will notice this all the time when you develop. Maybe you change the device name, advertising data, service info etc.. and it will still have old value.

Really the only way I've found to workaround this is to disable and re enable BLE (when using phone applications). With master control panel PC application this isn't a problem because you can reset your usb dongle and re discover services as you need to.

Maybe someone has a better answer.. But i see this a lot and haven't found a great way with the smart phone aps.

[jsna]

Dear Michael Dietz .

•If only the binary download s110_nrf51_8.0.0_softdevice.hex + ble_app_uart_dfu.hex
-> The lights turn on led 1.

-> Nordic_UART display.

• s110_nrf51_8.0.0_softdevice.hex (softdevice) + nrf51422_xxac.hex(bootloader) +
  ble_app_uart_dfu.hex(application) -> When downloading sequentially, The lights turn on led 1 and Led 2. -> DfuTarg display.

thank you.