Remote Gate Lock

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I decided to design my own remotely controlled fence/gate lock based on ESPHome and Home Assistant. I have a double gate which meant most commercially available solutions wouldn’t work and were very expensive. This solution is based on readily available components and is simple to assemble and install.

GateLockInstalled
GateLockInstalled1920×1446 334 KB

You can find the 3d printable enclosure, gate pin and customizable design files at Remote Gate Lock by jshank | Download free STL model | Printables.com.

The 3d files make up the enclosure and “pin” that threads into the linear actuator and acts as the lock hasp. I only needed to run 2-wires to the linear actuator outside while keeping the micro-controller and relay in the garage. There is a channel between the enclosure and lid that I filled with 3/32-Inch Graphite Valve Stem Packing to prevent liquid from entering the enclosure. The linear actuator is IP54 rated so this gives it just a bit more protection. The gate already has a magnetic contact sensor so I know when it’s closed and don’t trigger the automation until it’s closed.

Components List

Linear Relay

  • DC HOUSE Mini Electric Linear Actuator Stroke 2"–Force 4.5 lbs–12V | High-Speed 1.97"/sec–Weight 0.15KG

12V 2-channel Relay

  • NO to 12V +
  • COM to linear actuator
  • NC to 12V-

Wemos D1 Mini

  • D5 to Relay IN1
  • D6 to Relay IN2
  • GND to 12v GND
  • 5V to MP1584EN output

Adjustable MP1584EN

DC Barrel Connectors

  • No need to cut the barrel jack off of the power supply

Wiring

GateLockv1
GateLockv11563×1083 113 KB

ESPHome Configuration

switch:
  - platform: gpio
    name: "gate_lock"
    id: relay_lock
    pin: D5
    restore_mode: ALWAYS_OFF
    interlock: [relay_unlock]
    on_turn_on:
    - delay: 1.5s
    - switch.turn_off: relay_lock
    internal: true

  - platform: gpio
    name: "gate_unlock"
    id: relay_unlock
    pin: D6
    restore_mode: ALWAYS_OFF
    interlock: [relay_lock]
    on_turn_on:
    - delay: 1.5s
    - switch.turn_off: relay_unlock
    internal: true

lock:
  - platform: template
    name: "North Gate Lock"
    unlock_action:
      - switch.turn_off: relay_lock
      - switch.turn_on: relay_unlock
    lock_action:
      - switch.turn_off: relay_unlock
      - switch.turn_on: relay_lock
    optimistic: true
    assumed_state: true

gatelockclip2

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