For slides and example code, see lesson 10

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• 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?

• 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.

• 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.

• 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.