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

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Answer 1:

Your instructor will coordinate that activity so everyone can see the entire list

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

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Answer 2:

Flow 1: subscribe to everything

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

In MQTT, # is the wildcard: subscribing to dustacademy/# means you receive all messages published to dustacademy/foo and dustacademy/bar (and to dustacademy itself)

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):

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Answer 3:

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?

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Answer 4:

Flow 3: trigger actuator

create a third flow which prints the temperature of the other mote in your mote pair
Describe what you did:

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Answer 5:

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

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Answer 6:

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:

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Answer 7: