DFU compatibility for a mesh example

[DeveloperZ]

Hi,

I am interested to know how to make a mesh node (for example, a light server) compatible to perform a DFU.

I have gone through the DFU page and I noticed that the DFU is done over the Serial port. I understand that the dfu firmware is being replaced with blinky firmware. Correct me if I am wrong.

Now, what changes should I make to the commands inorder to make the light_server example node to be DFU compatible/capable over the air?

Would replacing the application hex file on step 8 to light_server instead of dfu solve it? or should I add any other commands to have light_server firmware first?

Thank you.

[Edvin]

DeveloperZ said:

When you say it works, did you mean that the board two was also updated with Blinky or just that the packets were pushed successfully but board 2 wasn't updated because of different device page?

 Only the boards with the correct key and application ID is updated. However you will see that the rest of the boards are also receiving the DFU image, but that is just for retransmission/relaying. They will not update to the new application unless both application ID and keys are correct.

[Edvin]

And have you tried to push a DFU image with application key 2 to board 1? Does board 2 update then?

[DeveloperZ]

Yes, 

The result was.... board 1 with LED's 1 and 2 ON indicating the DFU event ended and board 2 got updated with Blinky!!!

[DeveloperZ]

DeveloperZ said:

As we discussed in the previous thread about the changes made to the UART that caused failure in pushing the DFU, how to push the update for an application which uses UART(requires changes to few files)?

Any idea about this?

This is what I tried: In a different 3.1.0 Mesh SDK and 15.2.0 SDK, I made changes to few UART files and implemented a mesh example with UART. I copied that hex file into a folder containing the stock SDK's, created a zip file in that folder and tried to push it onto the boards with Mesh dfu stock example. It failed to push the update.

Does the changes in the UART files of the receiving DFU packet also causes failure to push DFU?

I shall try once again and update if there is any change in the test that I made with this UART application.

[Edvin]

Yes. That is the intention? Now you have updated the device that matched the device page from another board with another application and device page.