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CC2530: Zigbee network distribution (parent child relationships)

Part Number: CC2530

Hello,

I'm trying to plot the network distribuition in order know which device connects where. To do this I'm trying to use the message "LQI Request" that supposedly gives out this information.

What I found out is most devices with the relationshiop "None of the above" instead of "child" or "parent". At first I assumed this relationship was shown when the device was a neighbour but neither a parent nor a child. The thing is after scanning the entire network some devices don't have parents not allowing me to draw the current network configuration.

I also tried the messages of address discovery, when used with request type extended the reply gives out the neighbours connected to the device but doesn't seem to work for what I need.

Using Ubiqua I can confirm the current device parent is not being reconized in the "LQI Request". Is there a better suited message to do this? The network is composed by devices with the stack 1.2.2a and 3.0.1. All routers and coordinator are in the stack 3.0.1.

  • Hello MSantos,

    I am looping in a member of our software development team to further investigate your request and provide a response.

    Regards,
    Ryan
  • Hi MSantos,

    Can you provide a capture of this setup where you send LQI requests to the devices in your setup.

    Regards, 

  • I attached a Ubiqua capture with the LQI requests. Since the coordinator doesn't send messages over the air they don't appear on ubiqua.

    The information on LQI requests on the coordinator is bellow:

    short Address: 0x0000

    0xB71F - Child

    0x34D3 - None of the above

    0x4F08 - None of the above

    0xF35E - None of the above

    0xBEB1 - None of the above

    0x78F1 - None of the above

    I only added the relevant information for my question but if you need extra data I can provide it later. Thanks for help :)1376.LQI Test.zip

  • Hi MSantos,

    LQI request is the best message suited message for that task, you can combine this with information from other messages like Transport Key at joining time, link status and route record, then manage yourself to create a table with the information that allows you to plot the network layout close to reality as possible but there is no mechanism in ZigBee that allows you to plot the network layout.