Any way to monitor 220V power draw?

Hardware
1

I use a Belkin Insight to monitor my washing machine, and to send me a push notification when the wash cycle is over. This works really well! I would like to extend the technique to my dryer, but it is 220V.

Has anyone found a reliable/safe way to monitor power draw from a 220V appliance within Home Assistant?

2

These support 100-240V

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3

How are those set up? Hard wired?

4

Yes, either you cut the cord and put the wires in accordingly, or you can do it with an extension cord (obviously you will need to cut the extension cord, or just buy a cord, plug and socket). The latter is the way I use it. If you have a lot of space behind the socket, you might be able to fit a shelly in there, they can sit behind the socket and looks a bit better, but really that is up to you (and your situation ofc).

5

You can also use a whole home energy monitor and just leverage it for this specific application. I’ve seen elsewhere where a device like this one https://amzn.to/2OwqpXb works.

6

Try pzem004 + wemos d1 mini with esphome or tasmota.

7

I use Blitzwolf-SHP2 with Esphome to monitor my dryer. Works like a charm and very safe! Recently ordered 10pcs of SHP6 to monitor my washing machine, dishwasher, well waterpump, pool pump, TV, coffe machine etc.

8

Which firmware did you install on your SHP6, did you calibrate it if so would mind you sharing your calibration config (esphome/tasmota)?

9

I´ve recieved my shp6 plugs and flashed them via tuya-convert. I was a bit lazy and flashed all of them with the same esphome bin and unfortunately I bricked one of them during individual OTA update. At least I only got one to solder :slight_smile:

They are not calibrated yet, but I intend to do it similar as Frenck, useing the code below.

#############################################
#                                           #
#                 BW-SHP6                   #
#                                           #
#############################################
substitutions:
  plug_name: uttag_esp_03

esphome:
  name: ${plug_name}
  platform: ESP8266
  board: esp8285
  on_boot:
    priority: -10
    # Turn on switch during startup
    then:
      - switch.turn_on: relay

wifi:
  ssid: "X"
  password: "Y"
  fast_connect: on

# Enable logging
logger:


# Enable Home Assistant API
api:
  password: "X"
  reboot_timeout: 12h

ota:
  password: "Y"

# Sync time with Home Assistant
time:
  - platform: homeassistant
    id: homeassistant_time

# Text sensors with general information
text_sensor:
  - platform: version
    name: ${plug_name}_version
  - platform: wifi_info
    ip_address:
      name: ${plug_name}_ip
    ssid:
      name: ${plug_name}_ssid

sensor:
  # Uptime sensor
  - platform: uptime
    name: ${plug_name}_uptime
  # WiFi Signal sensor
  - platform: wifi_signal
    name: ${plug_name}_wifi_signal
    update_interval: 30s
  # Power sensor
  - platform: hlw8012
    sel_pin:
      number: GPIO12
      inverted: true
    cf_pin: GPIO05
    cf1_pin: GPIO14
    change_mode_every: 3
    update_interval: 10s
    # Current sensor
    current:
      name: ${plug_name}_current
      unit_of_measurement: A
      accuracy_decimals: 3
      filters:
        # Map from sensor -> measured value
        - calibrate_linear:
            - 0.0 -> 0.0
            - 1.0 -> 1.0
            - 2.0 -> 2.0
            - 3.0 -> 3.0
            - 4.0 -> 4.0
            - 5.0 -> 5.0
        # Make everything below 0.01A appear as just 0A.
        # Furthermore it corrects 0.013A for the power usage of the plug.
#        - lambda: if (x < (0.01 - 0.013)) return 0; else return (x - 0.013);
    # Voltage sensor
    voltage:
      name: ${plug_name}_voltage
      unit_of_measurement: V
      accuracy_decimals: 2
      filters:
        # Map from sensor -> measured value
        - calibrate_linear:
            - 0.0 -> 0.0
            - 100.0 -> 100.0
            - 200.0 -> 200.0
            - 300.0 -> 300.0
            - 400.0 -> 400.0
            - 500.0 -> 500.0
    # Power sensor
    power:
      id: power
      name: ${plug_name}_power
      unit_of_measurement: W
      accuracy_decimals: 1
      filters:
        # Map from sensor -> measured value
        - calibrate_linear:
            - 0.0 -> 0.0
            - 1000.0 -> 1000.0
            - 2000.0 -> 2000.0
            - 3000.0 -> 3000.0
            - 4000.0 -> 4000.0
            - 5000.0 -> 5000.0
         # Make everything below 2W appear as just 0W.
         # Furthermore it corrects 1.14W for the power usage of the plug.
#        - lambda: if (x < (2 + 1.14)) return 0; else return (x - 1.14);
#  # Total daily energy sensor
#  - platform: total_daily_energy
#    name: ${plug_name}_daily_energy
#    power_id: power
#    filters:
#      # Multiplication factor from W to kW is 0.001
#      - multiply: 0.001
#    unit_of_measurement: kWh

binary_sensor:
  # Binary sensor for the button press
  - platform: gpio
    name: ${plug_name}_button
    pin:
      number: GPIO13
      inverted: true
    on_press:
      - switch.toggle: relay

switch:
  # Switch to toggle the relay
  - platform: gpio
    id: relay
    name: ${plug_name}_switch
    pin: GPIO15
    on_turn_on:
      - light.turn_on: led
    on_turn_off:
      - light.turn_off: led

output:
  # Relay state led
  - platform: esp8266_pwm
    id: state_led
    pin:
      number: GPIO02
      inverted: true

light:
  # Relay state light
  - platform: monochromatic
    output: state_led
    id: led

# Uses the red LED as a status indicator
status_led:
  pin:
    number: GPIO00
    inverted: true

The SHP2 for my dryer is not calibrated. I used a graph to define which current level that should set each dryer state.

Edit 1:
Fixed mixup on state_led(blue) and status_led(red)

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