NRF52840 + OpenThread + Azure IoT Hub / MQTT Sample

[SebastianCorin]

Hi!

I am looking for a NRF52840+OpenThread+Azure IoT Hub SDK solution. Here is what I did so far. Nothing helped:

1. Thead CLI Example on NRF52840 + Border Router on PI with RCP NRF52840 is working. I can ping ipv6 in mesh and outside mesh. I can ping ipv4 outside mesh
2. I merged the code of nRF9160: Azure IoT Hub — nRF Connect SDK 2.2.99 documentation (nordicsemi.com) into the Thread CLI example, created and added certificates and ended up with:

*** Booting Zephyr OS build v3.2.99-ncs1 ***
Azure IoT Hub sample started
Azure IoT Hub library initialized
AZURE_IOT_HUB_EVT_CONNECTING
E: getaddrinfo() failed, error -11
E: mqtt_helper_connect failed, error: 11
Connection request sent to IoT Hub

I am aware of the following tickets but nothing what was described helped. There is no complete description included:

• (+) Azure IoT Hub Library with OpenThread - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)
• (+) Error -22 in mqtt_connect() - nRF52840dk with Azure IoT Hub using OpenThread and TCP - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

My ask is a working sample with Azure IoT Hub and Openthread / MQTT and Openthread.

I added my github repo to make the code available for testing: sebastianspross/nrf52840_ot_azure (github.com)

Really appriciate your help!

Thanks

Sebastian

[NYCdream]

Sebastian, were you able to successfully make this combination work?  We are looking at nrf52840+open thread+mqtt+Azure iot hub also.  Thanks and let me know if you have had success  

[SebastianCorin]

unfortunately not. I decided to pause the project.

It is long time ago but I think there was an issue with TCP. The TCP implementation which was automatically used was not able to reach the internet. PINGs where possible.

My workaround, which I think is okay, was:
nrf52840->CoAP->CoAP-Bridge on e.g. the raspberryPi of the Borderrouter -> Bridge is sending payload via e.g. python to any endpoint e.g. Azure IoT Hub HTTP-endpoint