In previous articles, we explored MQTT in-depth, even setting up a web-based remote controller that simulated a physical button. We did this in a “Soft IoT” way, avoiding hardware intricacies. However, in IoT, networking between devices plays a crucial role. Not all IoT devices are connected to the Internet or can communicate via MQTT over the internet, as shown in our earlier examples. These devices need a low-latency, low-power network that can auto-discover and manage device communication seamlessly.