Thread Border Router networking fail

Hi,

The instructions on Thread Border Router is the latest and should be correct. It also looks like you are using the correct versions of the firmware and border router image. 

I have tested this multiple times before, and have not had any issues with getting the network up and running.

Are you using a revision 1 DK or later? Did you have the DK connected to the RPi before you booted it? Did you run 'erase all' command on the DK before flashing the NCP FW? You did not run any other commands on the border router prior to the "sudo wpanctl status" command?

If nothing works, I would suggest that you start over and flash the DK and border router image again to the devices to see if that solves any issues.

Best regards,
Jørgen

Hi Jørgen:

How are you today!

Is there any update?

Pls kindly help advise how to solve it?

Best Regards,

Rick.

Hi Jørgen,

Thank you for your reply.

It can work.

now  I try this example  "Thread MQTT-SN Example".

after i compile the code than i do the step below

1.Build the example according to the instructions in Building examples.
2.Turn the MQTT-SN gateway on according to the instructions in Thread Border Router.
3.Program a development board with the MQTT-SN Subscriber application.
4.Program another development board with the MQTT-SN Publisher application.
5.Let the clients find the MQTT-SN gateway by pressing Button 2 on both boards.

one of the FTD get kick out , when i do the 5 step

and the error message show up
"0> <error> app: Message of unsupported type has been received.
0>
0> <error> app: MQTT-SN message could not be processed."

so the border router seems to be can only connect to one FTD

if i connect two devices in the same time one of FTD will be kick of

is there any reason may cause that? Or i miss some step need to be done?

Please help me,thanks

Best Regards,

Rick.

Can you check which message type you are receiving when this problem occurs, for instance by printing it in mqttsn_packet_receiver.c:949:

NRF_LOG_ERROR("Message of unsupported type has been received: %d.\r\n", message_type);

Hi Jørgen,

I get the message_type is 1.

both are the same.

Pls kindly help advise how to solve it?

Best Regards,

Rick.

Hi Jørgen:

How are you today!

Are you have any advice? and are you have the same issue?

Pls kindly help advise how to solve it?

Best Regards,

Rick.

Hi Rick,

I tested this on my end, and I am seeing the same behavior. I believe that the unhandled event message happens because the second board is in a state where it does not expect to receive this event when the first board does a Gateway search. The examples are most likely not written with multiple publishers in mind.

I'm not sure if the limitation is in the example code, or in the configuration of the Eclipse Paho MQTT-SN Gateway on the Raspberry Pi, but a workaround that seems to work is to disconnect after each node is done publishing (by pushing button 3), and reconnecting (by pressing button 3) on the second board before pressing button 4 to publish a message. You can also integrate this into a single button-press:

case BSP_EVENT_KEY_3:
{
    uint32_t err_code;

    if (mqttsn_client_state_get(&m_client) == MQTTSN_CLIENT_DISCONNECTED)
    {
        err_code = mqttsn_client_connect(&m_client, &m_gateway_addr, m_gateway_id, &m_connect_opt);
        if (err_code != NRF_SUCCESS)
        {
            NRF_LOG_ERROR("CONNECT message could not be sent. Error: 0x%x\r\n", err_code);
        }
    }
    while(ready_to_publish == false)
    {
        thread_process();
    }
    publish();
    while(ready_to_publish == true)
    {
        thread_process();
    }
    err_code = mqttsn_client_disconnect(&m_client);
    if (err_code != NRF_SUCCESS)
    {
        NRF_LOG_ERROR("DISCONNECT message could not be sent. Error: 0x%x\r\n", err_code);
    }
    break;
}

You also needs to declare the flag in top of main.c:

static uint8_t ready_to_publish = false;

And set/clear the flags in the appropriate event cases:

case MQTTSN_EVENT_REGISTERED:
    NRF_LOG_INFO("MQTT-SN event: Client registered topic.\r\n");
    regack_callback(p_event);
    ready_to_publish = true;
    break;

case MQTTSN_EVENT_PUBLISHED:
    NRF_LOG_INFO("MQTT-SN event: Client has successfully published content.\r\n");
    ready_to_publish = false;
    break;

You can now remove/comment out the entire BSP_EVENT_KEY_2 case, as this is no longer needed.

Attaching full main.c as well: 

Best regards,
Jørgen

Hi Rick,

I tested this on my end, and I am seeing the same behavior. I believe that the unhandled event message happens because the second board is in a state where it does not expect to receive this event when the first board does a Gateway search. The examples are most likely not written with multiple publishers in mind.

I'm not sure if the limitation is in the example code, or in the configuration of the Eclipse Paho MQTT-SN Gateway on the Raspberry Pi, but a workaround that seems to work is to disconnect after each node is done publishing (by pushing button 3), and reconnecting (by pressing button 3) on the second board before pressing button 4 to publish a message. You can also integrate this into a single button-press:

case BSP_EVENT_KEY_3:
{
    uint32_t err_code;

    if (mqttsn_client_state_get(&m_client) == MQTTSN_CLIENT_DISCONNECTED)
    {
        err_code = mqttsn_client_connect(&m_client, &m_gateway_addr, m_gateway_id, &m_connect_opt);
        if (err_code != NRF_SUCCESS)
        {
            NRF_LOG_ERROR("CONNECT message could not be sent. Error: 0x%x\r\n", err_code);
        }
    }
    while(ready_to_publish == false)
    {
        thread_process();
    }
    publish();
    while(ready_to_publish == true)
    {
        thread_process();
    }
    err_code = mqttsn_client_disconnect(&m_client);
    if (err_code != NRF_SUCCESS)
    {
        NRF_LOG_ERROR("DISCONNECT message could not be sent. Error: 0x%x\r\n", err_code);
    }
    break;
}

You also needs to declare the flag in top of main.c:

static uint8_t ready_to_publish = false;

And set/clear the flags in the appropriate event cases:

case MQTTSN_EVENT_REGISTERED:
    NRF_LOG_INFO("MQTT-SN event: Client registered topic.\r\n");
    regack_callback(p_event);
    ready_to_publish = true;
    break;

case MQTTSN_EVENT_PUBLISHED:
    NRF_LOG_INFO("MQTT-SN event: Client has successfully published content.\r\n");
    ready_to_publish = false;
    break;

You can now remove/comment out the entire BSP_EVENT_KEY_2 case, as this is no longer needed.

Attaching full main.c as well: 

Best regards,
Jørgen

Hi Jørgen,

Thank you for your reply.

if work is to disconnect after each node is done publishing, it can subscribe MQTT?
because I follow the WEB steps below Playing with Thread and MQTT-SN on Nordic nRF52840, I need support to publish and subscribe at the same time in the device.

Pls kindly help advise how to solve it?

Best Regards,

Rick.

I only tested the publisher, as it looked like this was the one you are using. 

Are you having problem with two subscribers as well? You did not mention that you wanted to combine these operations, that may require large modifications of the examples.

Hi Jørgen,

1. I did not use the publish of two devices.
I use this example "Thread MQTT-SN Example".
Use one device of the MQTT-SN Subscriber application and other one device of the MQTT-SN Publisher application. (one publish device, one subscribe device)

2. Yes, two subscribers well the same problems too. do you have any advice that can solve the problems of two subscribers?

3. Now I have two devices, wanted to combine operations publish and subscribe at the same time in the device.
Pls kindly help advise how to solve it?

Best Regards,

Rick.

Hi Rick,

Your latest questions is getting far outside of the topic of this thread. Can you please post it in a new thread, to prevent this from getting too messy? That will help other users with similar questions find the information much more easily.

If you do that, we will try to help you achieve what you want.

Best regards,
Jørgen

Hi Jørgen:

I created a new thread is Thread MQTT-SN Example publish and subscribe can not combine operations ,

Pls kindly help advise how to solve it?

Best Regards,

Rick.