Trying to set up the thread network by using coap_client, coap_client

[maybe]

hi there,

I am trying to set up the thread network, and ultimate goal is to build a ream local mesh network, and my plan is to set up the thread network by flashing the coap_server, and coap_client samples to the boards, and the thread network can be set up automatically. The sample locations are listed here: "ncs/nrf/samples/openthread/coap_client""ncs/nrf/samples/openthread/coap_server".

By reading the instructions of the sample, I learned that both use cases should be burned on the development board, but due to the limited resources at hand, i only got one nrf52840dk board and several nrf52840_dongles, so what i do is that i burnt the server sample to the nrf52840dk board and the client sample to dongle, i also added the code in the server part to output log information and observe the thread network status. however, the thread network is not set up and wild status is shown in results.

these are the part of code which i changed,

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    while(1){
        k_msleep(10000);
        LOG_INF("Network info update...\n");
        routerInfo = otHistoryTrackerIterateRouterHistory(ot, &myIterator, &entryAge);
        networkInfo = otHistoryTrackerIterateNetInfoHistory(ot, &myIterator, &entryAge);
        otDeviceRole deviceRole = networkInfo->mRole;
        //printk("The router entry has the event of: %d\n", routerInfo->mEvent);
        //printk("The next hop router ID is:  %d\n", routerInfo->mNextHop);
        //printk("The old path cost is: %d\n", routerInfo->mOldPathCost);
        //printk("The router id is : %d\n", routerInfo->mRouterId);
       
        switch(deviceRole){
            case OT_DEVICE_ROLE_DISABLED:
                printk("The thread stack is disabled\n");
                break;
            case OT_DEVICE_ROLE_DETACHED:
                printk("The device is not currently in a thread network\n");
                break;
            case OT_DEVICE_ROLE_CHILD:
                printk("The device is now a Child\n");
                break;
            case OT_DEVICE_ROLE_ROUTER:
                printk("The device is now a Router\n");
                break;
            case OT_DEVICE_ROLE_LEADER:
                printk("The device is now a Leader\n");
                break;
            default:
                printk("Unknown status.\n");
                break;
        }

    }

and this is shown on the RTT viewer:

i will be really appreciate if anyone can give some hint about that, thanks!!