Pymesh - Border router stops receiving messages.

[catalin]

@rfinkers
It's the duty of the micropython app to take the BR packets from the Pymesh and forward them outside.
For example in BR docs in this callback here, the packet is available to app, so it should be freed from the openthread message buffer. More precisely, it's freed before that, in the socket callback (in freertos TASK_Mesh).

[rfinkers]

@catalin
In the BR example on this line, I've changed the 8 to the MAC of my device.
I also added this line after "print(rcv_data)":

print(mesh.cli("bufferinfo"))

Now sending this from another node a few times and the buffer is getting full...
So something is not what it should be?

[ThomasWright]

Hi @rfinkers @catalin,

I was wondering if this issue ever got resolved as I am having the same issue?

I am able to send data through the lora mesh and use the border router magic byte to identify items which need to go outside of the lora mesh via the border router. For the first few minutes, I am able to forward these messages on using my micropython script via wifi.

However, when I read the data from the open thread message buffer it does not remove it. I can see the amount of free space in the buffer going down each time the border router receives a message using the below command even though I am reading the data out to another variable to be forwarded on.

print(mesh.cli("bufferinfo"))

Once the buffer is full I get an error saying not enough memory.

Any help would be gratefully received.

[rfinkers]

@ThomasWright said in Pymesh - Border router stops receiving messages.:

I was wondering if this issue ever got resolved as I am having the same issue

Nope, I'm still having problems with the BR so I'm not using it...

[catalin]

hi @rfinkers and @ThomasWright, thanks for point-out this problem. I will try to debug this week, to understand what happens.
2-3 weeks ago I did used Border Routers for hours to send data to Pybytes, and it worked.

[ThomasWright]

@catalin if it helps I am using lopy4's with firmware version 1.20.0 rc11, incase it is board specific.

[jingai]

I'm seeing the same behavior on my border router. Buffers fill up and it detaches.

[catalin]

Hi all,
I can reproduce this issue. Sometimes BR works for 1-2 hours, sometimes it gets stuck in 15 minutes. I've tried few ideas, didn't fix it.
It seems to be some issue with message buffer inside openthread, or how Border Routing is handled from micropython.
Honestly, in the next 2 weeks, due to holidays, nobody can check this bug, starting 17th of July, I will resume work. Sorry for this delay.

[jingai]

I build the firmware myself, and I noticed that the idf_v3.1 branch was recently force-pushed and now doesn't include the openthread component.

To build 1.20 with openthread, what IDF branch are we supposed to use...?

This seems off-topic, I know, but I believe I've fixed the problem and was wanting to submit a PR -- but I don't know which IDF branch I should be using to confirm the fix.

[catalin]

Hi @jingai,
In light of the recent changes to the Thread Group the Pymesh implementation is unlikely to remain opensource. We will provide updates as soon as we know how this will be organised. We expect to have clarity around August / September 2019.
The libopenthread.a binary is available here: https://github.com/pycom/pycom-micropython-sigfox/blob/release-candidate/esp32/lib/libopenthread.a

[catalin]

Hello everyone,

A few updates:

• Border Router bug was fixed (🤦‍♂️ unfortunately packets were not de-allocated at the BR level), a release will be provided shortly
• as I said before, due to licensing issues, we will release a dedicated Pymesh version of binary firmware release (just latest development+pymesh module), we're targeting next week.
• I am currently testing some micropython scripts which are sending data from Pymesh to the Pybytes, so data from whole Mesh is visible in Pybytes only if at least one node has Wifi connectivity to Internet;
• now, I am updating the internal Pymesh to the latest openthread, there are some protocol optimisations, which I hope will make Pymesh more robust