MQTT-PingPing

• There is only 1 program: PingPong
• You need to a MQTT broker: See http://mosquitto.org
• Start that first, then run PingPong
• It will print some status EVERY few messages; seconds or seconds – depending on system-speed
• Terminate with ^C

Note: on a RaspberryPi, when mosquitto is installed (apt-get) it will run a broker by default – fine