I’m looking at connecting my existing Merlin MT100EVO garage door opener to Apple Homekit. I thought it might be a good opportunity to setup a Raspberry Pi with Home Assistant for some future projects too. I’m reasonably comfortable with the Home Assistant setup but had a few questions about the garage door opener.
I found this guide which uses a Shelly 1 wifi relay with a wired contact sensor: https://savjee.be/2020/06/make-garage-door-opener-smart-shelly-esphome-home-assistant although I was planning to use the default Shelly software rather than installing ESPHome like in this implementation: https://hometechhacker.com/make-your-own-smart-garage-door-opener-for-15
- Does the approach seem reasonable? I’m hoping for a fairly straightforward solution as this is my first project
- You stock a contact sensor but it looks like the wire might not be long enough. Which is the correct wire to use if I needed to replace it with a longer wire?
- It looks like I need to get doorbell wire to connect the Shelly to the garage door opener. I couldn’t spot it on your website but thought you might use a different name for it? Or just a trip to the hardware store?
- Lastly which wire would I use to connect the 30v DC Merlin external accessory power supply to the Shelly?
Shopping list so far
- Raspberry Pi 4 Model B (2GB) https://core-electronics.com.au/raspberry-pi-4-model-b-2gb.html
- Power Supply (3A) https://core-electronics.com.au/raspberry-pi-4-official-power-supply-usb-c-5v-15w-white.html
- Micro SD card (Application Class 2) https://core-electronics.com.au/32gb-microsd-card-with-noobs-for-all-raspberry-pi-boards.html
- Ethernet cable https://core-electronics.com.au/rj45-cat5e-patch-cable-1m.html
- SD card reader - perhaps not required with the above SD card
Garage Door Opener
- Shelly 1 https://shelly.cloud/products/shelly-1-smart-home-automation-relay
- Contact sensor https://core-electronics.com.au/magnetic-contact-switch-door-sensor.html
- Doorbell wire to connect the garage door opener to Shelly?
- Wire to connect shelly 1 to 30v DC garage door external accessory power supply?