remove a node from ble mesh

RE: remove a node from ble mesh

Simonr — Tue, 02 Jan 2024 12:19:29 GMT

I don't really see why the size of data would be relevant for why it fails, unless it times out in the meantime for example. But if it happens once in every 3000 product it will be very hard to reproduce it sounds, and until you do have any kind of logging info or way to reproduce this we don't really have much we can help with.

Best regards,

Simon

RE: remove a node from ble mesh

Øyvind — Thu, 28 Dec 2023 08:45:02 GMT

Hello,

We are severely understaffed this week because of the Christmas holidays, and Simon will have to get back to you on this next week. Sorry for the inconvenience.

Kind regards,
Øyvind

RE: remove a node from ble mesh

listenYes — Mon, 25 Dec 2023 01:46:25 GMT

My code is modified based on light_switch/server
However, it is regrettable that I have not found a way to reproduce the problem so far, because the probability of its occurrence is too low, probably only once in 3,000 products.
Could this be related to the large amount of data I need to delete? Because I need to synchronize the deletion of approximately 100K data when I log out.

RE: remove a node from ble mesh

Simonr — Tue, 12 Dec 2023 14:10:46 GMT

What example project is your application based on? In most of the samples just pressing button 4 are supposed to reset and unprovision the device, which I'm assuming you also do. I would suggest starting by debugging the nodes if possible to see what exactly happens when this occur, getting a log or an error message would be helpful, as all I can do with the current information is guesswork. Are there any conditions you can meet to easier reproduce this issue or does it seem completely random?

From the known issues of the BLE Mesh SDK release notes the only thing worth looking at is if you are doing a firmware upgrade of your devices as there are some issues that might require you to reset the device once more before the start of provisioning.

For scenario 1 I discussed this with a colleague, and I think what you might seeing with the "Remove node" button is that it just is removed from the provisioner, and the node itself doesn't reset/delete its provisioning information, which is why you still see it in the "provisioned state", in that case you either need to reset the node on the node side, or as part of this "remove node" call you need to send the node a message to delete its partition data or reset before removing it.

Best regards,

Simon

RE: remove a node from ble mesh

listenYes — Tue, 12 Dec 2023 01:31:10 GMT

The problem is not specific to hardware, but all devices may experience it. I store a large amount of data in FLASH, so it will also be synchronized and cleared when offline.Meanwhile, I don't plan to migrate to SDK17.0.2 because there are many products and the workload is huge.Is there any way to fix this problem on this basis?

RE: remove a node from ble mesh

Simonr — Fri, 08 Dec 2023 13:00:45 GMT

Is this problematic node one specific piece of HW or can it be any node that turns out faulty sometimes? If it is just one piece of HW I would maybe suspect a drifting HF crystal or something else in the circuit not working as expected.

I would assume a SW issue would pop up on any node and not just one specific one.

It's also worth noting that the nRF5 SDK v15.x.x is pretty old at this point, and the latest version of the Mesh SDK (v5.0.0) supports SDK v17.0.2 and SoftDevice 7.2.0 and the fix to your issue might be already taken care of in Mesh SDK v5.0.0. Release notes and bugfixes can be found here.

Best regards,

Simon