esphome-docs/cookbook/dual-r2-cover.rst
2019-02-17 12:28:17 +01:00

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Dual relay cover motor control
==============================
.. seo::
:description: An example of how to integrate covers that are controlled by two relays into ESPHome.
:image: sonoff_dual_r2.jpg
:keywords: Relay, Sonoff Dual R2, Cover
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 <https://www.itead.cc/sonoff-dual.html>`__ 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 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.
.. code-block:: yaml
esphome:
name: cover
platform: ESP8266
board: esp01_1m
wifi:
ssid: '***'
password: '***'
api:
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
See Also
--------
- :doc:`/guides/automations`
- :doc:`/components/cover/template`
- :doc:`/devices/sonoff`
- :ghedit:`Edit`
.. disqus::