I’ve been on a journey to integrate my Evohome system with Homey to control my electric heaters, and I’m thrilled to share my success story! 
The Challenge: By default, Evohome doesn’t support switching electric heaters, but I knew Homey could be the solution. After some research, I found that with the right setup, it’s completely doable!
Setup Requirements:
- A Honeywell T87RF2025 sensor (or compatible)
- A smart switch that can handle high loads (I used an Osram Smart+ Zigbee switch)
- A Homey hub, of course!
Step-by-Step Process:
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Create a New Zone in Evohome:
- Enter the Evohome setup menu and select zone configuration.
- Add a new zone and name it something meaningful (like “Electric Heater Zone”).
- Choose the zone type as “Electric zone” to avoid unintended boiler activation.
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Configure the T87RF2025 Sensor:
- Reset the sensor by holding the left button for 10 seconds.
- Pair it with Evohome by selecting “Co” and pressing the left button.
- Evohome should confirm the sensor is connected.
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Integrate with Homey:
- Add the new Evohome zone to Homey.
- Connect the smart switch to Homey (I used a Hue bridge for convenience).
-
Create Flows:
- Use the sensor values to trigger actions on the smart switch.
- For example, when the sensor detects a temperature drop, the switch turns on the heater.
Results: This setup has been a game-changer for me! Now, I can remotely monitor and control my electric heaters through Homey, all while maintaining compatibility with Evohome. The integration is seamless, and I love how customizable the flows are.
Tips for Others:
- Ensure all devices are properly paired and configured before setting up flows.
- Test each component individually to troubleshoot any issues early on.
If you’re looking to enhance your Evohome system with smart controls, I highly recommend exploring Homey! The possibilities are endless, and the community support is fantastic. 
Happy automating! 