Security+ Garage Door Opener

Description

Smart. Local. Secure. A ready-to-install garage door smart home control solution for Chamberlain, Craftsman, Merlin, and LiftMaster Security+ and Security+ 2.0 garage door openers – complete with ESPHome, Home Assistant compatibility, and built-in environmental sensing!

Key Features

• • Direct Security+ Control
    Fully integrates with existing Security+ / Security+ 2.0 protocols with automatic detection – no reliance on proprietary cloud apps or subscriptions
  • Local, Private Operation
    Connects directly to your door opener using just two wires. Once installed, all functionality works locally – even with internet down
  • ESPHome ready
    Ships with ESPHome firmware preconfigured for seamless auto-discovery in Home Assistant. Customize automations via YAML for advanced control
  • Partial‑Open Support
    Control precise door positioning – open fully, partially, or just a few inches to let in air or receive deliveries .
  • Door Position & Obstruction Feedback
    Reads real-time status and obstruction sensors through the Security+ serial protocol – no extra wiring needed
  • Built‑In Temp & Humidity Sensor
    Monitors your garage climate using a HDC1080 sensor. Data flows directly into Home Assistant for automations and dashboards
  • Open‑Source
    Powered by Konnected’s open-source Secplus gdolib library. Upgradable via OTA or USB
  • Safe
    Supports a pre-closing warning with audible and visual closing warnings to comply with U.S. 16 CFR 1211.14(f)
  • Powerful
    Uses the Espressif ESP32-S3, with WiFi, Bluetooth & Matter support
  • Future-Proof & Expandable
    Includes 3.3V, GND, I2c, AUX out, and 2 AUX inputs
  • Easy Installation
    Uses just 2 wires to connect to your garage door opener! Works with openers having yellow/red/purple learn buttons

What You’ll Get

• CircuitSetup Security+ Garage Door Opener module (pre‑flashed with ESPHome)
• 3d printed case

What You’ll Need

• 5v power adapter
• USB-C cord to connect the power adapter to the Security+ Garage Door Opener
• 2 short lengths of wire (18-20AWG) to connect the GDO to your garage door opener
• Double sided tape or velcro to mount the GDO module

Installation

1. Unplug your garage door opener
2. Mount the CircuitSetup Security+ GDO module to the back of your garage door opener or next to your wall button (make sure there is an outlet close by)
3. Your garage door opener motor has terminals typically labeled as follows – Red/White or “Wall Button”, usually marked clearly on the motor.
4. Using 2 short lengths of wire, connect the white wire (GND), and red wire (signal), to the corresponding terminals on the GDO module (the white terminal is marked with a white box on the case lid). Make sure to leave any existing wires in place.
5. Connect the GDO module to your 5v power adapter via a USB-C cable – a blue status LED should flash
6. Restore power to your garage door opener

ESPHome

1. Look for a temporary WiFi AP like circuitsetup-gdo-xxxx, and connect with your phone or computer
2. A captive portal opens automatically in a browser. If it does not, navigate to 192.168.4.1 in your browser
3. Enter your home WiFi SSID and password, then save

The module will reboot and join your WiFi network automatically.

1. Home Assistant will discover the device – If you don’t see a notification, go to Settings > Devices & services
2. Click Configure to set up the garage door device, controls, and sensors in Home Assistant

Resources

CircuitSetup ESPHome secplus_gdo

Special Thanks

Konnected was gracious enough to open-source their gdolib code and ESPHome secplus_gdo, which was derived from RATGDO. Without companies like these, the open-source home automation community would not be able to grow, and develop further.