The goal of this lab is to build several control loops: heating up a mote causes the LED of another mote to switch on, over the Internet

Create sensors/actuator pairs

• list the MAC addresses of the motes you have which can act as :

  • a sensor

    • temperature sensor

    • jumper wire to act as a switch

  • an actuator

    • an LED that can be switched on

    • a buzzer

• form [sensors → actuator] pairs. What role is your mote playing, with what other mote?

Flow 1: subscribe to everything

• create a first flow which subscribed to all notifications with topic dustacademy/#

Flow 2: send mote data to broker

• create a second flow which publishes all "oap" notifications onto the MQTT broker, using MQTT topic dustacademy

• Draw your flow, indicating the configuration details of the nodes in your flow (including any code):

• once everyone is done, make sure you can see data from all motes appearing on the MQTT broker

• modify your second flow to publish on topic dustacademy/<mac> where <mac> is your MAC address

• what code did you use?

Flow 3: trigger actuator

• create a third flow which prints the temperature of the other mote in your mote pair

• Describe what you did:

• On the actuator mote side, modify your third flow so the actuator (LED or buzzer) toggles on/off depending on temperature

• describe your changes

Challenge!

• we want to be able to trigger your actuator by sending an MQTT message to the broker using your mote’s MAC address

• Describe your design and implement it: