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122 lines
3.3 KiB
ReStructuredText
122 lines
3.3 KiB
ReStructuredText
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Etekcity Voltson (ESW01-EU)
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===========================
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.. seo::
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:description: Configure an Etekcity Voltson and calculate the missing current sensor
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:image: esw01-eu.jpg
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:keywords: Etekcity, Voltson, ESW01, ESW01-EU, HLW8012, Home Assistant, ESPHome
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The Etekcity Voltson brings a 10A relay, two LEDs (blue and yellow), a push button and a :doc:`/components/sensor/hlw8012`
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in a very small package and at a reasonable price.
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.. note::
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There are quite a few hardware revisions out there. Also reginal versions like US, UK and EU are different.
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Flashing
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--------
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Opening the case for flashing varies a lot for different hardware revisions. Mine was easy as it had two tiny T5 Torx screws in the front and four Philipps screws inside.
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Once you have opened the case, remove the PCB from it and attach your TTL as follows:
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5V and GND go to the bottom:
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.. figure:: images/esw01-eu-pcb-bottom.jpg
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:align: center
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:width: 75.0%
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On the opposite side, T12 is TX, T13 is RX. During boot you need to connect T11 and T16 pads to GND. Easiest is to flash with pogo pins.
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.. figure:: images/esw01-eu-pcb-top.jpg
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:align: center
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:width: 75.0%
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Configuration
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-------------
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As the Voltson has its SEL pin permanently pulled high, we are unable to switch from voltage measurement to current measurement.
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This will be circumvented by defining the initial mode to be voltage measurement (see :doc:`/components/sensor/hlw8012` documentation)
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and calculating the current with `Ohm's law <https://en.wikipedia.org/wiki/Ohm%27s_law>`_: ``P (watts) = V (volts) x I (amps)``
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.. code-block:: yaml
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esphome:
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name: voltson
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platform: ESP8266
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board: esp01_1m
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### you wifi and other settings here ###
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### pins ###
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# D1 GPIO5 | LED blue | status_led
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# D0 GPIO16 | LED yellow | led1
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# D5 GPIO14 | SW1 | button1
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# D2 GPIO4 | REL1 | relay1
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# D6 GPIO12 | HLW8012/CF1 | cf1_pin
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# D7 GPIO13 | HLW8012/CF | cf_pin
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status_led:
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pin:
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number: GPIO5
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output:
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- platform: gpio
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id: relay1
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pin: GPIO4
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- platform: gpio
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id: led1
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pin: GPIO16
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switch:
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- platform: output
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name: "Voltson Relay"
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id: switch1
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output: relay1
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on_turn_on:
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- output.turn_on: led1
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on_turn_off:
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- output.turn_off: led1
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binary_sensor:
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- platform: gpio
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id: button1
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pin:
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number: GPIO14
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mode: INPUT_PULLUP
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inverted: true
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on_press:
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- switch.toggle: switch1
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sensor:
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- platform: hlw8012
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sel_pin: 0 # not connected
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cf_pin: GPIO13
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cf1_pin: GPIO12
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voltage:
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id: hlw8012_voltage
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name: "HLW8012 Voltage"
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power:
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id: hlw8012_power
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name: "HLW8012 Power"
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on_value:
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- sensor.template.publish:
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id: hlw8012_current_calculated
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state: !lambda 'return id(hlw8012_power).state / id(hlw8012_voltage).state;'
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update_interval: 10s
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initial_mode: VOLTAGE
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change_mode_every: 4294967295 # basically never
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- platform: template
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id: hlw8012_current_calculated
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name: "HLW8012 Current (calculated)"
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unit_of_measurement: A
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accuracy_decimals: 2
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See Also
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--------
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- :doc:`/components/sensor/hlw8012`
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- :ghedit:`Edit`
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