dfu of nrf connect IOS doesn t work

[sarah_sdw]

Hello,

we are developing a machine that is in pre-production. We need to be able to update the firmware and until now all works well on android. but on IOS the dfu does not work.

I use the same device with the same firmware to update. it's ok on android nRF Connect for Mobile version 4.22.3

but does not work on IOS nRF Connect Version 2.0.2

it seems to me that it worked on IOS with version 1.8.8

I use:

nrf52832, SDK version: 15.3.0, Soft Device version: S132 V6.1.1

the device does not start in dfu target mode.. 

is there a problem with the IOS application? do I have to change something in my firmware to be compatible with the new version? 

thanks for the quick help ... we must soon produce our device.

[Hung Bui]

Hi Sarah, 

Could you capture a sniffer trace when you start doing DFU 

I assume you are doing DFU buttonless ? 

Do you support changing advertising name in your DFU buttonless application ? Do you have any modification in the buttonless library and the bootloader ? 

If you test with the stock DFU buttonless example in our SDK would it work ? 

Could you try to manually enable notification on the DFU buttonless characteristic and write 0104 into it? It should switch to DFU target. 

[sarah_sdw]

Yes I use DFU buttonless,

When I manually enable notification on DFU buttonless characteristic and write 0104 the device reset the bootloader with name "DfuTarg" and I can connect to the device and update the firmware without any problem. and after the device restart the application.

But when I connect to my device and I go on the page DFU, I can select the firmware to update (step3), go in step4 ready to update, but when I click on start I remain stuck on step 5 uploading and the device does not restart in bootloader "DfuTarg".

[Ming]

hi，

       I have a problem, the program must be upgraded once after the first download. I know through your description that you have solved this problem. Can you tell me how to solve it?

best wish。