BLE FOTA example for Central device

[Miguel Ferreira]

Hi,

Is there any example of a Central device which is able to connect to a peripheral and update it ? Im guessing the bluetooth_central_dfu_smp sample is probably the closest one to what I want.

Thank you!

[Sigurd Hellesvik]

Miguel Ferreira said:

Do you notice anything wrong here ?

I do not see anything, but it is hard to stare at code until an error pops out.

Sigurd Hellesvik said:

If you give these, I can try to see if I get the same.

Aha, I now realize that my example works, but not your custom one.

Then it is a bit hard to test myself.
But I will help you debug it instead.

Sigurd Hellesvik said:

From SMP Error codes, 3 = "Invalid value; a request contains an invalid value."

I might be a bit wrong here. Error 3 could also mean ESRCH 3 /**< No such context */.

Can you check which part of bt_dfu_smp_command() returns the error?
And then maybe even which part of its sub-functions return the error also?

Regards,
Sigurd Hellesvik

[Miguel Ferreira]

Hi again Sigurd,

Thanks for helping me on this. So I figure out the issue and I can send the data correctly. Seems that on the first chunk (where you send the image size and sha) I have to wait some seconds before start sending the data. Was getting error -16 (Timeout).

Now Im on the point of sending a confirm messages for the peripheral , so it can use the new image when it reboots. Im taking a look at the PR you mentioned, really useful! Have you tried to do this also ?

Thanks a lot!

[Sigurd Hellesvik]

I think my sample on git also can send "test" and "confirm":

Sigurd Hellesvik said:

github.com/.../quote]

But the PR is probably doing it in a more elegant way.

Regards,
Sigurd Hellesvik

[Miguel Ferreira]

Meanwhile I created the command myself and its working :) 
Thanks a lot for your help Sigurd Hellesvik !

[Adam Varga]

Dear Sigurd,

Since this is a relatively recent thread, I thought I quickly chime in to also write down my observations about your smp_client_ble example (which is really useful btw in light of no official examples...).

1. The image hashes don't match if checked with mcumgr-cli
2. Upload process errors at 97%, but the image seems to be transferred correctly. A reset must be done to the smp_client.
   
3. Pressing button 4 on the smp_client DK gives the following error:

I'm seeing similar issues with NCS 2.2.0 and NCS 2.3.0 as well.
Reading a bunch of threads in the forum, I think it will be really nice once your mentioned PR will be merged, and/or will be included in the NCS.