Getting Secure Bootloader example in SDK 15 to run

RE: Getting Secure Bootloader example in SDK 15 to run

maxx44 — Tue, 22 May 2018 17:40:28 GMT

Success! I went through the steps in "Getting started with Nordic's Secure DFU bootloader" and used the generated keys to recompile a bootloader and create a zip download for the blinky example. Not an easy process, but it did eventually work for me.

You may be hearing from me again as my target platform is a nRF52810. I thought I had best step through the well supported nRF52832 DFU first.

I'll mark this as verified. Thanks for the good help guiding me through it.

Max

RE: Getting Secure Bootloader example in SDK 15 to run

bjorn-spockeli — Tue, 15 May 2018 07:01:20 GMT

The default public key in the bootloader example and the private key used to sign the DFU test images should match. However, to rule out the key issue I would recommend generating your own public-private key pair. Will keep it open.

RE: Getting Secure Bootloader example in SDK 15 to run

maxx44 — Mon, 14 May 2018 16:28:46 GMT

Bjorn,

OK. I was hoping the keys in the examples were set to match.

Please leave this pending. I won't get back to it until next week. I'll post status then.

Thanks again,

Max

RE: Getting Secure Bootloader example in SDK 15 to run

bjorn-spockeli — Wed, 09 May 2018 12:39:57 GMT

HI Max,

towards the end, just before the disconnect, you'll see the following error message

E 20:26:13.473 [DFU] Remote DFU error: INVALID OBJECT

This means that the public key in the bootloader and the private key used to sign the DFU image does not match. Could you try to follow the steps outlined on this Infocenter page on how to test the bootloader.

RE: Getting Secure Bootloader example in SDK 15 to run

maxx44 — Wed, 09 May 2018 00:40:38 GMT

Bjorn,

I tried saving the log file and inserting it here. I hope it works ....haven't done this before. Let me know if it tells you something meaningful.

Max

devzone.nordicsemi.com/.../Log-2018_2D00_05_2D00_08-202726.txt

RE: Getting Secure Bootloader example in SDK 15 to run

bjorn-spockeli — Mon, 07 May 2018 08:37:29 GMT

maxx44: Great, then we're one step closer to getting this working. Could you post the log output from the nRF Connect mobile app when the DFU fails and the device disconnects? You should see the log if you swipe from left to right in the nRF Connect app.

RE: Getting Secure Bootloader example in SDK 15 to run

maxx44 — Fri, 04 May 2018 17:22:43 GMT

Bjorn,

Thanks. I'm using a Samsung Galaxy Tab A running Android 7.1.1. It seems I cannot uninstall the Samsung default file manager. I did install Total Commander referenced in one of the links above. It appears in the nRF Connect menu to "Open from" and allows me to select the .zip file and start the DFU. I see a graph pop up briefly to monitor the download. However, it quickly disconnects and doesn't appear to have downloaded the app.

I also tried the Google Drive option that also appears on the "Open from" list (after placing the zip file out on my Google Drive). This behaves similar to the Total Commander. DFU tries to start the download and also disconnects.

So at least it seems the DFU is attempting to start with the .zip file from the SDK. Still not getting the DFU completed. Let me know if you're aware of other things to try.

Max

RE: Getting Secure Bootloader example in SDK 15 to run

bjorn-spockeli — Fri, 04 May 2018 08:30:15 GMT

maxx44: I have seen issues with the file manager system on some Android devices , i.e that it opens .zip files instead of selecting the .zip file itself. Sometimes its related to the native file manager system and sometimes its related to a 3rd party one. Here are the links to some similar cases:

https://devzone.nordicsemi.com/f/nordic-q-a/18538/why-is-zip-for-dfu-in-nrf-toolbox-not-selectabel/71562#71562

https://devzone.nordicsemi.com/f/nordic-q-a/17628/dfu-application-error

So if you're using a 3rd party file manager, then try using the native one. If you're using the native one, try downloading a 3rd party one and use that instead.

Best regards

Bjørn