Adding support for remock (or any Locker/garage door) with ESPHome

A relative told me that 2 years ago he had a lock of this type, in that case, a remock locker:

And 1 month ago we set up home assistant in his house, so he wanted to control this lock from home assistant
These kind of latch are so simple to use, and (in my opinion) they are a really good solution for securing your door because they are invisible.

In the case of remock, they have an optional “hub” which costs around 60€ and you’ll get the lock working with the manufacturer app…

But… we want to manage this kind of locker with Home Assistant, isn’t it?

How to do it
First of all, the first thing I did was look for documentation on this type of lock, the protocols used for the connection between the controls and the lock, and how to “hack” it with an ESP8266 and some RFID module.

Unfortunately, these locks use specific protocols such as “rolling code”, which are quite complex to “hack” and we could have synchronization problems… etc.

But, the good news is that these locks include several remote controls, and obviously these remotes have switches, and of course, there is a type of component that allows us to activate a switch with arduino/ESP… the relays.

TL/DR, Let’s start, parts required

  • A remote of the lock
  • ESP8266/Nodemcu/ESP32
  • 3xRelays
  • Tin
  • AWG30 wires
  • Some dupont wires

The schematics
The schematics are so simple. Please, I already know that there are better options for handling switches, like SSR… but I built this project with the things I have now in my home

Please, in order to “attach” the AWG30 to the relay, just include a little of tin on the end

The ESPHOME code

Ok, at this time, we must create the ESPHOME yaml code, which so simple, we have 3 relays, so we have 3 switches:

  name: esphome-remock # the name of the esp

  board: nodemcuv2 # Select your board

# Enable logging

# Enable Home Assistant API
    key: "YOUR_API_KEY"

  password: "PASSWORD_OTA"

  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
    password: "FALLBACK_PASS"


  - platform: status_led
    name: "Change LED status"
      number: GPIO2
      inverted: true

  - platform: gpio
    pin: D3
    name: "Bloquear cerradura" # Close (or lock xD) the latch
    id: close_relay
    restore_mode: always off
  - platform: gpio
    pin: D6
    name: "Abrir cerradura" # Open the latch
    id: open_relay
    restore_mode: always off
  - platform: gpio
    pin: D5
    name: "Apertura de emergencia" # Emergency open
    id: emergency_relay
    restore_mode: always off

Home Assistant scripts

Ok, we will active the relay, then wait for 0,2s (simulating a “user click”) and then, switch it of. To do this, we just need to create 3 scripts like this:

alias: Abrir la cerradura
  - type: turn_on
    device_id: "YOUR_DEVICE_ID"
    entity_id: switch.abrir_cerradura
    domain: switch
  - delay:
      hours: 0
      minutes: 0
      seconds: 0
      milliseconds: 200
  - type: turn_off
    device_id: "YOUR_DEVICE_ID"
    entity_id: switch.abrir_cerradura
    domain: switch
mode: single
icon: mdi:door-closed

Then, you can just add a card to lovelace:

type: entities
  - entity: script.open_door
  - entity: script.block_door
  - entity: script.emergency_door
title: Cerradura
state_color: false

Summary picture (without relay connections)

Bonus track, 3d printing a case
Ok but… we don’t want to have these wires on top of a table, so… it’s time to open Fusion 360 and design a case!!!

These are the 3MF files for this project

Demo time!! How does it works??

This is the final stage of the project:

BONUS TRACK: Block the door when you leave home:

With automations… it’s easy to do this :slight_smile:

alias: Block the door when all of use leave the home
description: ""
  - platform: zone
    entity_id: device_tracker.DEVICE_1
    zone: zone.home
    event: leave
  - service: script.block_door
    data: {}
  - service: notify.telegram
      message: "The door has been closed"
mode: single

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Thanks to @JcMinarro, the esphome yaml could be improved by doing something like this

  - platform: gpio
    pin: D3
    name: "Bloquear cerradura" # Close (or lock xD) the latch
    id: close_relay
    restore_mode: always off
      - delay: 200ms
      - switch.toggle: close_relay

By this way, we’re reducing the calls between HA and ESP, so we’re also reducing the possible errors :slight_smile:

(Don’t forget to remove the “off” action on the HA scripts)

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Muy buen proyecto Sergio, gracias

1 Like