nRF Toolbox couldn't do OTA using Bluetooth 5

[Alice]

Hi

We are using the nRF52840 and the application is OK now. Then I do the OTA using a Android phone which supports Bluetooth 5 and it's made in our country. I use the nRF Connect to connect the device and make it switch to the bootloader mode, at this time the device is advertising as DfuTarg. Then I use the DFU in the nRF Toolbox to connect it and then select the UPLOAD. But it indicates Uploading all the time then fail. Anyone could hele me have look? Thanks.

When the device is advertising as DfuTarg, I could use nRF Toolbox for IOS to do OTA. The nRF Toolbox for Android is download from github.com/.../Android-nRF-Toolbox

Blue5_NoFlash_0720.zip

Blue5_NoFlash_APP_SD_BL_0720.hex

[Hung Bui]

Hi Alice,

When testing here I can see that the bootloader crashed when connected to the phone after switching from application to bootloader.

Have you modified the bootloader ?Have you tried to test with just the bootloader (no application ) ?

Please try to test with the bootloader example with no modification (except for the key) and no application, flash softdevice and bootloader and then try to update the application.