Dual relay cover motor control¶

The following is a possible configuration file for common covers that use a motor with 2 inputs. Only one should be powered at a time (interlocking) to either move the cover up or down. For this the Sonoff Dual R2 can be used which has two independent relays. Additionally this configuration allows the single button on the Sonoff to control the motion by cycling between: open->stop->close->stop->…

These kind of motors automatically stop when the end of the cover movement is reached. However, to be safe, this automation stops powering the motor after 1 minute of movement. In the rare case of the end-stop switch in the motor failing this will reduce the risk for damage or fire.

Of the four main components (button sensor, 2 relays switches and the cover), only the cover will be visible to the end-user. The other three are hidden by means of not including a name. This is to prevent accidentally switching on both relays simultaneously from MQTT/Home-assistant as that might be harmful for some motors.

Note

Controlling the cover to quickly (sending new open/close commands within a minute of previous commands) might cause unexpected behaviour (eg: cover stopping halfway). This is because the delayed relay off feature is implemented using asynchronous automations. So every time a open/close command is sent a delayed relay off command is added and old ones are not removed.

esphomeyaml:
  name: cover
  platform: ESP8266
  board: esp01_1m
  board_flash_mode: dout

wifi:
  ssid: '***'
  password: '***'

mqtt:
  broker: 'mqtt'
  username: ''
  password: ''

logger:

ota:

binary_sensor:
  - platform: gpio
    pin:
      number: 10
      inverted: true
    id: button
    on_press:
      then:
        # logic for cycling through movements: open->stop->close->stop->...
        - lambda: |
            if (id(cover).state == cover::COVER_OPEN) {
              if (id(open).state){
                // cover is in opening movement, stop it
                id(cover).stop();
              } else {
                // cover has finished opening, close it
                id(cover).close();
              }
            } else {
              if (id(close).state){
                // cover is in closing movement, stop it
                id(cover).stop();
              } else {
                // cover has finished closing, open it
                id(cover).open();
              }
            }

switch:
  - platform: gpio
    pin: 12
    id: open
  - platform: gpio
    pin: 5
    id: close

cover:
  - platform: template
    name: "Cover"
    id: cover
    open_action:
      # cancel potential previous movement
      - switch.turn_off: close
      # perform movement
      - switch.turn_on: open
      # wait until cover is open
      - delay: 60s
      # turn of relay to prevent keeping the motor powered
      - switch.turn_off: open
    close_action:
      - switch.turn_off: open
      - switch.turn_on: close
      - delay: 60s
      - switch.turn_off: close
    stop_action:
      - switch.turn_off: open
      - switch.turn_off: close
    optimistic: true

Table of Contents

Dual relay cover motor control¶

See Also¶