Kogan SmarterHome Smart Plug With Energy Meter and 5V 2.4A USB Ports

https://www.kogan.com/au/buy/kogan-smarterhome-smart-plug-energy-meter-5v-24a-usb-ports/

GPIO Pinout

Pin	Function
GPIO03	Push Button
GPIO13	Green LED (Inverted: true)
GPIO14	Relay
GPIO12	HLW8012 SEL Pin
GPIO04	HLW8012 CF Pin
GPIO05	HLW8012 CF1 Pin

Basic Config

substitutions:
  device_name: kogan_plug_1
  device_ip: 192.168.x.x
  device_icon: mdi:power-socket-au
  device_restore: ALWAYS_ON
  
  # Higher value gives lower watt readout
  current_res: "0.00225"
  # Lower value gives lower voltage readout
  voltage_div: "805"

esphome:
  name: ${device_name}

esp8266:
  board: esp8285

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

logger:
  
api:
  reboot_timeout: 15min
  encryption:
    key: !secret encryption_key

ota:
  password: !secret ota_password

binary_sensor:
  - platform: gpio
    pin:
      number: 03
      mode: INPUT_PULLUP
      inverted: true
    name: "${device_name}_button"
    on_press:
      - switch.toggle: relay

  - platform: status
    name: "${device_name}_status"

switch:
  - platform: gpio
    id: led
    pin:
      number: GPIO13
      inverted: true

  - platform: gpio
    name: "${device_name}_plug"
    pin: GPIO14
    id: relay
    icon: ${device_icon}
    restore_mode: ${device_restore}
    on_turn_on:
      - switch.turn_on: led
    on_turn_off:
      - switch.turn_off: led

sensor:
  - platform: hlw8012
    sel_pin:
      number: GPIO12
      inverted: true
    cf_pin: GPIO04
    cf1_pin: GPIO05
    current:
      name: "${device_name}_current"
      unit_of_measurement: A
    voltage:
      name: "${device_name}_voltage"
      unit_of_measurement: V
    power:
      id: ${device_name}_wattage
      name: "${device_name}_wattage"
      unit_of_measurement: W
    current_resistor: ${current_res}
    voltage_divider: ${voltage_div}
    change_mode_every: 8
    update_interval: 15s

  - platform: total_daily_energy
    name: "${device_name}_daily_energy"
    power_id: ${device_name}_wattage
    filters:
      - multiply: 0.001
    unit_of_measurement: kWh

  - platform: wifi_signal
    name: "${device_name}_rssi"
    update_interval: 5min

  - platform: uptime
    id: uptime_sensor
    name: "${device_name}_uptime"
    update_interval: 5min
    on_raw_value:
      then:
        - text_sensor.template.publish:
            id: uptime_human
            state: !lambda |-
              int seconds = round(id(uptime_sensor).raw_state);
              int days = seconds / (24 * 3600);
              seconds = seconds % (24 * 3600);
              int hours = seconds / 3600;
              seconds = seconds % 3600;
              int minutes = seconds /  60;
              seconds = seconds % 60;
              return (
                (days ? to_string(days) + "d " : "") +
                (hours ? to_string(hours) + "h " : "") +
                (minutes ? to_string(minutes) + "m " : "") +
                (to_string(seconds) + "s")
              ).c_str();

text_sensor:
  - platform: template
    name: "${device_name}_uptime_human"
    id: uptime_human
    entity_category: diagnostic
    icon: mdi:clock-start

time:
  - platform: homeassistant
    id: homeassistant_time

Appendix

If you are seeing incorrect power/current readings at higher power draws (i.e. current of 5A@240V while power is showing ~2000W), your unit most likely has a BL0937 chip. You can verify this by looking at underside of the PCB, in the general area of the ESP chip. To get correct sensor results, make the following config changes:

(...)
substitutions:
  current_res: "0.001" # visually verified the shunt resistor is 1m0
  voltage_div: "1720" # rough value, tested against multimeter readout
(...)
sensor:
  - platform: hlw8012
    (...)
    model: BL0937
(...)

The readings should be correct from now on.