BlitzWolf BW-SHP3 Power Monitoring Plug: ESPHome

Starter ESPHome config

Built from the pinout above. Keys and the Wi-Fi password come from secrets.yaml in ESPHome. Check the pins against your hardware revision before flashing: one model can ship with different boards.

substitutions:
  name: blitzwolf-bw-shp3-power-

esphome:
  name: ${name}
  friendly_name: "BlitzWolf BW-SHP3 Power Monitoring Plug"

esp8266:
  board: esp01_1m  # most plugs and relays have 1 MB flash; check yours

logger:
api:
  encryption:
    key: !secret api_key
ota:
  - platform: esphome
    password: !secret ota_password
wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  ap: {}
captive_portal:

switch:
  - platform: gpio
    pin: GPIO4
    id: relay1
    name: "Relay 1"  # Left Relay
    restore_mode: RESTORE_DEFAULT_OFF
  - platform: gpio
    pin: GPIO15
    id: relay2
    name: "Relay 2"  # Right Relay
    restore_mode: RESTORE_DEFAULT_OFF

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO13
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 1"  # Left Button
    on_press:
      - switch.toggle: relay1
  - platform: gpio
    pin:
      number: GPIO16
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 2"  # Right Button
    on_press:
      - switch.toggle: relay2

status_led:
  pin:
    number: GPIO0
    inverted: true  # Right Power LED (Inverted: true)

sensor:
  - platform: hlw8012
    sel_pin:
      number: GPIO12
      inverted: true
    cf_pin: GPIO5
    cf1_pin: GPIO14
    voltage:
      name: "Voltage"
    current:
      name: "Current"
    power:
      name: "Power"
    energy:
      name: "Energy"
    update_interval: 10s
    # calibrate voltage_divider and current_resistor against a known load

# Other pins from the pinout:
#   GPIO2: Blue Status LED (Inverted: true)

How to flash

• Most devices are flashed over UART: a 3.3 V USB-TTL adapter to RX, TX, GND and 3V3, holding GPIO0 to ground at power-on (ESP8266/ESP32). Mains power disconnected.
• Beken (BK72xx) and Realtek chips are flashed with ltchiptool, or with cloudcutter without opening the case if the firmware allows it.
• Details and board photos: the device page in the ESPHome database.

A config from scratch: ESPHome generator. Which pins are safe: pinout.

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