My #IoT article on the #M5Stack Atom #NBIoT device (via #Telstra), using secure #MQTT over #IPv6 is now up. If you are interested in a bit of #ESP32 programming using #PlatformIO then check it out: https://purple.telstra.com/blog/m5stack-atom-nb-iot-device-with-secure-mqtt-over-ipv6