Using nRF52840 over MQTT-SN Gateway with basic Nordic image

[jelalanne]

Hi,

I want to implement an MQTT-SN network with a Raspberry Pi 3B+ MQTT/MQTT-SN transparent gateway and some End-Devices in MQTT-SN.

This is working over Wifi with Paho library, but I want to implement this network with nRF52840 DKs over Thread between the gateway and the end-devices, while keeping basic images on the nordics (no MQTT-SN specific image on it, just basic, like CLI or something).

The structure is as followed:    {End-Device(no internet)} <--> {nRF52840 basic image} <----(thread IPv6 network)--> {nRf52840 basic image} <--> {Raspi3B+ MQTT-SN Gateway} <--> {Azure Hub}

The main problems are:

- How do I configure the CLI image on the nRF so that I don't have to put the "udp send..." thing to send data (Or if it exists an image doing that already)?

- How to transmit Gateway data (that are, by default, transmitting data to end-devices over Wifi and IPv4) through the nRF serial connection? I mean, I could use the "socat" linux feature but how could the nRF know to which end-device he should transmit

Thanks for your help!

By the way, I'm part of an international company for this project, I would love to have a permanent contact with one of the nordic engineers to go on this project with my team. Thanks.

[Marjeris Romero]

Hi Jeremie,

Can I ask why you don't want to use our MQTT-SN specific examples here?

How do I configure the CLI image on the nRF so that I don't have to put the "udp send..." thing to send data (Or if it exists an image doing that already)?

This is exactly what the MQTT-SN specific examples do.

How to transmit Gateway data (that are, by default, transmitting data to end-devices over Wifi and IPv4) through the nRF serial connection? I mean, I could use the "socat" linux feature but how could the nRF know to which end-device he should transmit

I am not completely sure I understand what you want to achieve here. A drawing of the nodes and the comunication between them would be very helpful. The border router sends IPv6 packets through NCP so if you are using our implementation this should not be something to worry about.

By the way, I'm part of an international company for this project, I would love to have a permanent contact with one of the nordic engineers to go on this project with my team. Thanks.

Both private and public tickets in Devzone will be answer by Nordic tech support engineers, so this is the right place to keep in contact with us look for the "Nordic Support Engineers" badge in our Devzone profile to know if you are talking to a Nordic employee or not.

Best Regards,

Marjeris

 

[jelalanne]

Hi Marjeris, thanks for your reply!

Our client doesn't want to modify the Nordic's image with our own codes, he wants something proven stable that he won't have to maintain later so no "intelligence" on the Nordic. That's why all of my code has to be kept on the host. So i'm trying to find some solutions (and that's why I cannot use your solution).

Right now I'm trying to make it with a full-NCP thread network but I cannot exchange personal messages with WPANTUND unfortunately