The router is not connecting between a leader and MTD child node in a thread mesh network in the open thread.

Question

Hello 
 I am a Hinal tailor (Embedded Developer). I would like to inform you that I am working on a sharp deadline project I need to connect more than 5 nodes in a mesh network using an open thread. we are using simple Coap client and server code to establish the network but the router is not connecting between leader and MTD child node. Please provide some references to do this and for range testing also. 
 then one more issue when I use the MTD node it becomes a child, After a certain time, it becomes a router. 
 how to set permanently MTD as a child. 
 
 thanks&regards 
 Hinal tailor

Charlie · Accepted Answer

Hi senthilkumar, 
 we are using simple Coap client and server code to establish the network but the router is not connecting between leader and MTD child node. Please provide some references to do this and for range testing also. 
 Can you provide more information about the topology of your connection using the nRF Thread Topology Monitor ? How many devices of 5 are used as CoAP clients and servers separately? :Leader(a special router) and child( MTD) can connect directly, so a router is not necessary between them. 
 I am not sure which kind of range testing you mean. The thread network is a self-organized mesh network protocol. When you stretch several devices in some distance, FTD devices are able to act as routers to relay the connections. 
 then one more issue when I use the MTD node it becomes a child, After a certain time, it becomes a router. 
 how to set permanently MTD as a child. 
 According to Node Roles and Types | OpenThread , " An MTD can only operate as an End Device (Child). " 
 I wonder how you identify an MTD as a router? or did your program the wrong firmware? 
 Best regards, 
 Charlie

The router is not connecting between a leader and MTD child node in a thread mesh network in the open thread.

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