Switching on siren with PIR motion sensor

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To set off the Calex Smart Siren when motion is detected, you can use the Calex Smart Motion Sensor. You do this by setting up a Smart Automation in which both devices are linked together. Here is a step-by-step description of how to do this:

Creating a Smart Automation is done in the Smart tab by tapping the (+) symbol at the top right.
You can delete an incorrectly entered rule by sliding it to the left.


  • Choose 'When device status changes
  • Select the PIR Sensor here
  • PIR status = ALARM


  • Press (+)
  • Control single device
  • Select the siren

                Select alarm status (light/sound alarm)
                Turn the alarm switch ON

  • Tap Next at the top right
  • Press (+)
  • Choose the Delay option
  • Set the time after which the siren should switch off (in this example we choose 5 seconds)
  • Tap Next in the top right corner
  • (+) press
  • Control single device
  • Select the siren
  • Turn the alarm switch OFF
  • Confirm the selection
  • Tap Next in the top right corner
  • Tap Confirm at top right and name the automation scene
  • Turn on the automation scene

See also this image as the scene looks in the Calex App:


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