In this tutorial I show some "secrets" of MQTT like QoS, Last Will, Keep-Alive etc. I build a scenario for a Sonoff switch and use Node-Red for the experiments. At the end, you should know how to deal with these parameters.
With the new "Raspberry Pi Zero W" we can build a MQTT broker for under 20 $
Sketch: github.com/SensorsIot/MQTT-me...
AsyncMQTTclient and PubSub libraries can be installed by the Arduino IDE library manager
MQTT/Node-Red video: • Node Red MQTT on the R...
Installing MQTT: learn.adafruit.com/diy-esp826...
oshlab.com/install-mqtt-mosqu...
Node-Red on Raspberry: nodered.org/docs/hardware/rasp...
If you want to support the channel and buy from Banggood use this link to start your shopping: bit.ly/2jAQEf4 (no additional charges for you)
/ andreas-spiess-7331894...
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