Cheap motion sensor with built in Zigbee controller

I wanted to use an IKEA Motion Sensor (Trådfri) for motion detection. First I tried to find a way to
get hold of the sensoring through the procotol using Coap-client etc. But no luck getting the triggered values out through the API.

So I found this guide Hack: IKEA Trådfri Motion Sensor for presence control.

But I wanted it to be integrated without the need to have multiple separated devices. Hence, I assembled them into one unit.

The motion sensor now includes a “light” that is controlled by the sensor itself. The power is taken from
the batteries included in the motion sensor itself so no external power source is required. This will lower
the max battery capacity a bit. But they are estimated to last 2 years, so let’s split that into half for at least
one of the batteries that I use as the power source.


Total price: 169 SEK (excl. the green diode)

Once the Zigbee board is desoldererd it can be fixed into the original motion sensor case. I also created a little hole for the LED so that I can see when it’s triggered. When it’s in place it’s easy to pair it with the sensor. Just pair as you do as usual, but the 2cm proximity is easily covered :wink:

Here is a little video of it being used:

Some images of the project…

Final result

As you can see, there is not much seen after the mod. Just a little white cable sticking out:

Some images during the process:

I’m using the same configuration as for the guide (Hack: IKEA Trådfri Motion Sensor for presence control). Using it as a binary sensor, but I have this automation as well:


- id: alarmhouse
  alias: "alarm motion detector"
  initial_state: 'on'
    - platform: state
      entity_id: binary_sensor.motion_house
      from: 'off'
      to: 'on'
    - condition: state
      entity_id: alarm_control_panel.ha_alarm
      state: armed_away
    - service: tts.google_translate_say
        message: "Motion detection"


  - platform: template
         friendly_name: "Motion Sensor House"
         entity_id: light.sensorlampa
         value_template: '{{ is_state("light.sensorlampa", "on") }}'
         device_class: motion

What the … :slight_smile:
I use deCONZ, on both Philips and Ikea it exposes a binary_sensor to HASS.
In node red I monitor the state of the binary sensor to do all my automations.
This is quite convoluted but I bet it was fun tinkering :slight_smile:

You could use zigbee2mqtt to integrate ikea motion sensor to HA

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Thank’s for the info. I implemented zigbee2mqtt after reading your post. I recommend this instead of my hack linked above.