MQTT-SN over Thread

RE: MQTT-SN over Thread

kalpino — Thu, 08 Oct 2020 11:59:54 GMT

I solved the problem doing what is suggested in this othe post:

https://devzone.nordicsemi.com/f/nordic-q-a/37172/unable-to-get-nrf52840-thread-mqtt-sn-example-working---mqttsn_search_gateway_no_gateway_found

By changing the GatewayUDP6Broadcast to ff03::1 the node is able to connect to the gateway as usual. I still do not understand why this happens though.

RE: MQTT-SN over Thread

Edvin — Thu, 01 Oct 2020 15:22:33 GMT

Perhaps you have some old network configurations in one of the chips. Try to call "sudo wpanctl status" and compare it to the network data on your mqtt-sn device.

Either way, I suggest you completely erase the flash on both devices (using "nrfjprog --eraseall") and re-flash them, so that you know that neither of the devices have any old flash garbage before you start the projects.

Best regards,

Edvin

RE: MQTT-SN over Thread

kalpino — Thu, 01 Oct 2020 13:57:59 GMT

The web inteface is the one that can be reached at the Router IP address:

The router I'm using is the one provided by Nordic (I followed instructions here: Border Router.

All I did was to form a new network using the tab "Form". Commissionig works fine: the cli on the device running the mqtt-sn example shows the correct thread parameters. Only thing is that it cannot find a valid mqtt gateway.

I wonder if I have to change some gateway parameters on the border router side, since I have changed the network parameters. Is this the case?

Thanks

RE: MQTT-SN over Thread

Edvin — Thu, 01 Oct 2020 12:58:13 GMT

Hello,

[quote user=""]I have now created a new Thread network from the Border Router web interface[/quote]

What does this mean? What Border Router web interface do you refer to?

What sort of device is the mqtt gateway? is that a Nordic Device? What state is it in? Is it looking for a network? Did it form it's own network?

Best regards,

Edvin