I’ve always been on the lookout for ways to integrate my IKEA Trådfri motion sensor into my Home Assistant setup more effectively. The default functionality is great for turning lights on and off, but I wanted to leverage it for more advanced automation tasks, like logging motion activity and triggering events within HA. Let me share how I hacked this setup to make it work!First, I needed a way for the motion sensor to communicate motion events to HA without relying solely on the Trådfri gateway. The solution? Repurpose a GU10 Trådfri lamp as a motion notification device. Here’s what I did:1. Disassembling the Lamp: I carefully took apart the GU10 lamp to access the circuit board. It was a bit nerve-wracking, but everything came apart without any issues.2. Removing the LED Plate: Unscrewing the LED plate was straightforward. I then desoldered the contacts to remove the aluminum heat diffuser.3. Extracting the Circuit Board: The circuit board was snapped in place, so I gently pried it out. No soldering or glue was involved, which made the process much easier.4. Hacking the Board: With the circuit board exposed, I realized it runs on 3.3 volts. I decided to solder out the Zigbee board and connect an LED to indicate motion detection.5. Encasing the Hack: To protect everything, I 3D printed a custom case. I also added a L78L33 voltage regulator to convert the 5V USB input to the required 3.3V.6. Integration with HA: After pairing the hacked device with the Trådfri gateway, I configured it as a light in HA. Using a template sensor, I transformed it into a binary sensor that detects motion events.The result? A seamless integration where the motion sensor now reliably notifies HA of activity. This has opened up a world of possibilities for automations around my home. Plus, the satisfaction of repurposing an existing device is unbeatable!If anyone is looking to achieve similar results, I’d be happy to share my detailed setup and configurations. Happy hacking everyone! 