IoT Engineering

Hands-on of lesson 10

For slides and example code, see lesson 10

Note: Do not work on this repository right away.
Check existing forks to find the specific repository for your class.

a) Where is the logic?, 5'

Who decides what a scene means in terms of color,
the lamp/device, a room/gateway or the backend?
Which information is required to make a decision?
Which devices are affected by changing a scene?
Which trade-offs does placing the logic involve?

b) Node-RED, 15'

Install Node-RED on the Raspberry Pi or your laptop.
Create a new flow or import & analyse one from here.
Use the debug node to build your flow step-by-step.

c) IFTTT Webhook trigger, 15'

Imagine an IFTTT Webhook enabled button device.
Create an applet to send SMS if the button is pressed.
Emulate the button_pressed event using the curl tool.
Sketch the hardware and code to build such a button.
If time permits, implement your connected button.

d) IFTTT Webhook action, 15'

Create an IFTTT applet to show the weather on a LED.
Design a Web API* to set weather conditions or colors.
(*Which would run e.g. on the ESP8266 or a Pi.)
Where would you map weather conditions to colors?
Create a Postb.in to receive the IFTTT Webhook call.