nRF 52833 DFU failed

[ching]

Hi,

I encountered a problem when I was doing an air upgrade.I use nrfconnect.apk to make an air upgrade, BootLoader will encounter an exception at about 7% when receiving new firmware.

Development environment:

• sdk: 17.0.2
• softdevice: s140_nrf52_7.2.0_softdevice
• hardware: Customer board(nRF 52833)
• app project: examples\ble_peripheral\ble_app_uart\pca10100\s140\arm5_no_packs\ble_app_uart_pca10100_s140.uvprojx
• bootloader project: examples\dfu\secure_bootloader\pca10100_s140_ble\arm5_no_packs\secure_bootloader_ble_s140_pca10100.uvprojx

I used the captain tool to get this error.

nRFConnect.apk Show this error

Best blessings，

ching

[ching]

hi ,

Supplement: I changed the MTU of the bootloader to 23

Best blessings，

ching

[ching]

Hi All,

https://github.com/NordicSemiconductor/Android-DFU-Library

I use this library for my own upgrade program, This error is prompted every time you upgrade.

Hope someone can help me.

ching

[Susheel Nuguru]

Hi Ching,

We have not seen this bytes lost error before and it seems that the connection is kept alive.

Have you modified anything in the bootloader? Can you try this wtth other phones to see if this is the issue with one phone manufacturer's BLE implementation. 

[ching]

Hi Nuguru,

Thanks for your answer.

I have solved this problem.

Our app forgot to add this function (setPrepareDataObjectDelay)

ching