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Detect Movement

In this example we will connect the Grove PIR (passive infrared) Sensor to your Arduino to detect movement. When movement is detected, a LED will light up and an email is sent out to notify you.

Prerequisites

Hardware

  • Arduino (or Arduino compatible) board with ethernet port
  • Arduino Grove shield
  • Grove PIR Sensor
  • Grove LED

Software

This example is part of the arduino-sdk and can be found in the examples folder. If you already ran the basic example on the previous page, you have everything installed to get started right away!

Setup

Hardware



  • Attach the Grove shield to your Arduino
  • Connect the Grove PIR sensor to the D2 Grove connector on the shield
  • Connect the Grove LED to the D8 Grove connector on the shield
  • Connect your Arduino to the internet with an ethernet cable
  • Connect the power supply to the mains and your Arduino board
  • Connect the Arduino to your computer using USB

Create a device

In your Arduino IDE under File > Examples > ATT_IOT open the motion-sensor example sketch

If you did the basic example on the previous page, you can re-use the same device and credentials.
If not, please check the create a device and enter credentials sections on that page.

Run the example

Simply hit the upload icon in the Arduino IDE. This will save the sketch, compile it and upload it to your Arduino.

If all went well, a PIR asset and LED asset are created under your device in AllThingsTalk Maker. Wave your hand in front of the pir sensor and see if the value changes.

Alternatively, you can also open the Tools > Serial monitor of the Arduino IDE. This can be very useful when debugging your own sketches.

  • Make sure you select the correct COM port to listen (under Tools > Port )
  • When the monitor is open, make sure the Baud rate is set to 9600

Next steps

Set up automation rule

We will create two automation rules.

  • One to turn on the LED when the PIR detects movement
  • One to notify us when movement is detected

Turn on LED

  • Select Your rules in the main menu (click your account name in the top right)
  • Click the + CREATE RULE button
  • Use rules wizard
  • Select Asset state change
  • Continue
  • Select your device from the list
  • Select the PIR asset
  • Compare to some value
  • Select comparison operator: Equal to (==) True
  • Continue
  • Actuate an asset
  • Select your device again
  • Select the LED asset
  • Set to some value: True
  • Continue to Else action
  • Actuate an asset
  • Select your device again
  • Select the LED asset
  • Set to some value: False
  • Save Rule
  • Enter a name for your rule
  • Save and start

Send notification

Please check the Smart doorbell example for a similar notification rule.

Create pinboard

Upon running the example, all needed assets are created. We can now use those to create a pinboard to visualise them.

  • On your device page hit the + CREATE PINBOARD button
  • Edit the control to your liking

If you chose a (historical) chart, make sure you have Data Storage turned on!