So, in the last installment of this series on the messaging protocol MQTT, we installed the Mosquitto MQTT broker. Now we’ll test it which we’re going to do on the same machine that Mosquitto ...

When you have an MQTT broker receiving messages, you want to be able to see them. [Xose Pérez] already had a system set up that sent him notifications, but he had a pair of 32×16 LED matrices,… ...