IoT Engineering

Hands-on of lesson 10

For slides and example code, see lesson 10

Note: Do not work on this repository right away.
Create your personal copy by clicking this GitHub Classroom link.

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.
• Be ready to present your Node-RED flow.

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 map weather conditions to colors.
• Create a Postb.in to receive the IFTTT Webhook call.
• How does the post request from IFTTT look?
• If time permits, implement the LED API on ESP8266.

Submitting results

• Commit and push local changes to your repository.
• Want a review? Create an issue, mention me (@tamberg).

Tools

Git

On your computer

• In the hands-on repository fork for your class, in README.md, click the GitHub Classroom link.
• Once you accept the assessment, you get a personal, private repository URL for your USER_NAME:

  http://github.com/fhnw-iot-CLASS/fhnw-iot-work-11-USER_NAME

On your computer or Raspberry Pi

• Clone the repository

  $ cd ~
  $ git clone REPO_URL

• Add a file

  $ git add FILE

• Commit changes

  $ git commit FILE -m "Fixed all bugs"

• Push changes

  $ git push

Wiki

• IoT Engineering Wiki

Support

• IoT Engineering Slack