how to expand network using zstack for more than 10 nodes to build a mesh

pratap yenubari

Other Parts Discussed in Thread: MSP430F5438, CC2520, Z-STACK

hi,

i am using msp430f5438 experimenter board with cc2520 for my wsn application.

i am using zstack (generic app example) for my implementation.

i want to build a network consisting of 1 coordinator , 5 routers and atleast 3 end devices with each router.i want to create a mesh network.

i have been successfully in implementing the network using 1 coordinator,1 router and 2 end devices to router.

i want expand my network to the above mentioned setup.

i have not been successful in expanding the network .the association of nodes fail when i increase the number of nodes.

where can i make the required change to achieve my objective.

thanks

over 10 years ago

0 YiKai Chen over 10 years ago

Guru 735685 points

It should be very easy to achieve your request. The default Z-Stack can do it. What do you mean association fail when you increase nodes?

0 pratap yenubari over 10 years ago in reply to YiKai Chen

Expert 2305 points

when i increase the number of nodes the ZED data is no more displayed at ZC.
and also orphan response message comes on the nodes

0 YiKai Chen over 10 years ago in reply to pratap yenubari

Guru 735685 points

1. What kind of data do you send from ZED to ZC?
2. Do you have sniffer log for your test?

0 pratap yenubari over 10 years ago in reply to YiKai Chen

Expert 2305 points

i am sending ouput of function generator from ZED to ZC.i am sending sine wave of freuencies between 1hz to 50 hz
i do not have sniffer log

0 YiKai Chen over 10 years ago in reply to pratap yenubari

Guru 735685 points

If you send messages from all ZEDs, it would pollute Zigbee channel and this might cause device can't join or orphan.

0 pratap yenubari over 10 years ago in reply to YiKai Chen

Expert 2305 points

sir,
then if we cannot send data from multiple ZEDs ,this is the bottle neck for Zstack .then what is the use of Zstack if we cannot use multi ZEDs to send data becoz in realtime scenario data has to sourced from multiple nodes at the monitoring server.

then what is the max limit of no of ZEDs that can send data using Zstack.

0 YiKai Chen over 10 years ago in reply to pratap yenubari

Guru 735685 points

This is nothing about numbers of ZEDs. It is about bandwidth of Zigbee. If you have ZED keeping sending messages which means it will block the channel and this cause the problem. As you might know, Zigbee is for low power/ bandwidth and it is not suitable for large data transmitting.

0 pratap yenubari over 10 years ago in reply to YiKai Chen

Expert 2305 points

yes sir i know Zigbee is for low power/ bandwidth and it is not suitable for large data transmitting.
then how to tackle this problem as our data rate is very low of 200bytes/sec.
we want to use multiple ZEDs to send data

0 YiKai Chen over 10 years ago in reply to pratap yenubari

Guru 735685 points

Maybe you can stop transmitting data first and try to join 10 devices to see if it works. If you only have a data rate of 200 bytes/sec, I would suggest you break down 200 bytes into 4 messages and send them in 250ms duration to reduce NWK and APS header penalty. In the way, you might can avoid this problem.

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how to expand network using zstack for more than 10 nodes to build a mesh