Credit: http://nodered.org
OUR EXPERT
Les Pounder is associate editor at Tom’s Hardware and a freelance maker for hire. He blogs about his adventures and projects at http://bigl.es.
The Internet of Things (IoT) is hard, right? Wrong. It is easy thanks to MQTT and Node-RED. For this tutorial, we are building a simple Raspberry Pi Pico W-powered sensor that sends data to a Pi-powered dashboard running on Node-RED. The protocol that we’re using is called MQTT and there are more details in the boxout (opposite page).
There is only one sensor connected to the Pico W. This is a common DHT11 temperature and humidity sensor, which can be picked up cheaply and is often
