Buttonless DFU Example broken

[parco]

Hi there,

I know you guys are very busy and I appreciate your quick response on Devzone.

I'd like to make a request for a more polished example of Buttonless DFU using SDK 12.1 with nRF52.

We are nearing production and if there's anything I'd like to get in concrete, it's a reliable way to upgrade firmware in the field.

The current example is not working out of the box, and the documentation doesn't offer a complete start to finish of how to upgrade. For example, what should we do after we send a 0x01 to the characteristic?

Thanks, Paul

[Hung Bui]

Hi Paul,

I guess you got part of the answer from here already.

What is exactly the issue you are having ?

After you send 0x01 to the characteristic, would it switch to the DFU bootloader ? Have you done any test with the DFU bootloader to update a new firmware ?

Note that bonding information is not forward from the application to the bootloader in the current bootloader and experimental buttonless application.

There are some bug fixes in the current experimental buttonless application, please use this version made by my colleague, Vidar. nRF5_SDK_12.1.0_buttonless_dfu.zip

[parco]

Great thanks, I'll check it out. What is the time frame for moving out of experimental to something more stable. I do not want to load thousands of units that I cannot upgrade if the bootloader changes in size again. I hope that is understandable.

[Hung Bui]

The bootloader is not experimental, it's production ready and I don't think we will change the bootloader size soon.

The experimental part is the example where you switch from application to bootloader without using a button. As long as you still can switch to the bootloader, it's possible to update and do bug fix.

[daniel77]

Does SDK 12.2 buttonless dfu incorporate this fixes? Anyway, I have tried this project example. I am not able to find DFU Service in the nRF Connect other than the heart rate service, battery service and device information under device named "Nordic_Template".

[Hung Bui]

@daniel: We haven't updated buttonless dfu on SDK v12.2

Which example did you use ? Make sure your phone don't catch the ATT table (you can try to turn off and on bluetooth, unpair the device). The DFU service to switch from application to bootloader won't be recognized as DFU service, it's a proprietary service, for now.