Zigbee: How to send Route Record?

[PiotrN]

Hi, I'm developing a device based on nrf52840 and SDK for Thread and Zigbee 3.2.0.

I would like to send Route Record command to the coordinator to be able to see the actual route in the homey developer tools environment.

How can I modify the Light Bulb example to send the Route Record containing the routing table?

Right now the Light Bulb example shows a question mark in the Route column:

Sniffer logs of the Light Bulb example when joining a homey hub:

light_bulb_joining.pcapng

You can compare it with a hue socket (route shown in the route column):

Sniffer logs of the hue socket when joining a homey hub:

hue_socket_joining.pcapng

(I simplified my Zigbee network for better readability. Normally I have more devices in the network.)

Thanks in advance!

Best regards,

Piotr

[Jørgen Holmefjord]

Hi,

Please have a look at this post.

Best regards,
Jørgen

[PiotrN]

Hello Jørgen,

I have read the whole thread and many others before I asked my previous question but I’m still not able to find information, why route request command is dropped in case of so simple network made of the coordinator and a router?

By the way, to keep the question more general and useful for other forum guests I’m referring to the Light Bulb example but in reality I have a ready product waiting for a green light for production.

Please find attached sniffer logs of the Light Bulb example where no reply to many-to-one route request with no reply can be seen (at the end of the file):

light_bulb_joining_220929.pcapng

Additionally please find printed logs of the successful joining:

As mentioned before, there is only the coordinator and the Light Bulb example in my network. I have analyzed the ZigBee Specification (especially 3.6.3.5.2 Upon Receipt of a Route Request Command Frame) and in my opinion, when there is only the coordinator and one router in the network, the many-to-one route request can be discarded if:

• there is no routing capacity
• nwkSymLink is TRUE and there is no entry corresponding to the transmit device in neighbor table, or outgoing cost field of the entry has value 0

I doubt that there is no routing capacity in case of the Light Bulb example and the outgoing cost is 1. I'm not able to check the nwkSymLink value.

I can't find the reason why the route requests are not replied?

Best regards,

Piotr