DFU OTA error via nRF Connect over Samsung S9.

[RyanA]

Hello,

I am trying to connect my nRF52 DK to my phone (apologies not desktop) and perform a DFU OTA via the nRF Connect app. I'm using SD132 6.1.1, and uploaded the secure bootloader from SDK 15.2 to the DK (built and compiled via segger) after uploading the Hex file of SD132 6.1.1, I followed the getting started guide from 2017 and built the boot-loader successfully, I built a zip file out of the peripheral blinky example hex file provided via SDK 15.2. Key generation went smoothly, and wasn't tampered with once generated. The zip was transferred to my google drive. The DK registers as DfuTarg and connects successfully to my Samsung galaxy S9 running nRF Connect, but when I tried to upload my zip from either my google drive or phone, it stalls after stating "Starting DFU..." . The screenshot below shows what happened after I began the DFU upload of the zip via the logger records. I am unsure if the issue is my zip, the bootloader application, or my phone/nRF Connect's connectivity settings. The two errors received after starting the upload were as follows from the logger:

[DFU] Error(0x85): GATT ERROR

Error 22 (0x16): GATT CONN TERMINATE LOCAL HOST

[RyanA]

Thank you for your continued help, but unfortunately that did not end up working. I found my softdevice is actually S132 6.1.0, and used this code to generate the new zip with the blinky hex from the path you directed:  nrfutil pkg generate --hw-version 52 --application-version 1 --application ble_app_blinky_pca10040_s132.hex --sd-req 0xAF --key-file private.key app_dfu_package.zip
Zip created at app_dfu_package.zip

This still resulted in the same time out error seen in the original screenshot. 

[Marjeris Romero]

Hi,

Sorry for the late reply. 0xAF is right for s132 v6.1.0, sorry for not catching that before. You can also try to increase the application-version, since the bootloader will reject DFU package if the new fw_version < current fw_version.

If this does not work, you should try using one of our test images so you can double check if you are able to perform an update at all. Please follow the steps here.

Best Regards,

Marjeris

[RyanA]

Thank you, I tried increasing the hardware number and it still did not work, but I think I will try to just do the default dfu upload first.