ESPHome Kogan Power Plug Devices Failing

I’ve had ESPHome setup for 2 years with success using them mainly for Kogan Power Plugs to track power usage and control the switches.

During that time I’ve had 2 plugs fail (on both occasions running my 1800W kettle after 6-9 months of use). I assumed it was a power draw issue but the plug is rated to 2400W.

When the plug fails, it won’t connect to wifi, won’t manually turn on/off with the button, makes a buzzing noise, and gets warm.

Now in the last 2 weeks, I’ve had 4 plugs fail from other electrical devices (fridge, dishwasher, UPS, desk lamp). These devices were typically always on, and used merely to measure power.

Do these ESP devices have such a short lifespan? Is my config causing premature death?

My sample code for reference. Your thoughts appreciated.

  hostname: "esp_energy_02"
  staticip: ""
  wifissid: !secret wifi_ssid_2
  password: !secret wifi_password
  location: "Kitchen"
  devicename: "Fridge"

  name: "${hostname}"
  platform: ESP8266
  board: esp8285

  ssid: ${wifissid}
  password: ${password}
  fast_connect: True
    # Set this to the IP of the ESP
    static_ip: "${staticip}"
    # Set this to the IP address of the router.
    # The subnet of the network. works for most home networks.

# Enable logging

# Enable Web server
  port: 80

# Enable Home Assistant API
  password: ${password}
  reboot_timeout: 0s

  password: ${password}

  - platform: homeassistant
    id: homeassistant_time

  - platform: template
    name: "${location}"
    id: location
    icon: mdi:map-marker
  - platform: template
    name: "${devicename}"
    id: device_name
    icon: mdi:alphabetical

  - platform: gpio
      number: GPIO0
      inverted: True
      mode: INPUT_PULLUP
    name: "${hostname}_button"
    internal: true
      - switch.toggle: relay

- platform: gpio
  name: "${hostname}_Relay"
  pin: GPIO14
  restore_mode: ALWAYS_ON
  id: relay
    - switch.toggle: greenled
    - switch.toggle: greenled

- platform: gpio
  name: "${hostname}_LED_Green"
  pin: GPIO13
  inverted: True
  restore_mode: ALWAYS_OFF
  id: greenled

  - platform: hlw8012
      number: GPIO12
      inverted: True
    cf_pin: GPIO04
    cf1_pin: GPIO05
    # Higher value gives lower watt readout
    current_resistor: 0.00087
    # Lower value gives lower voltage readout
    voltage_divider: 2030
      name: "${hostname}_Amperage"
      unit_of_measurement: A
    # Calibration of 'filters' and 'lambda'
      # Map from sensor -> measured value
      - calibrate_linear:
        - 0.0 -> 0.01
        - 0.09 -> 0.1
      # Make everything below 0.01A appear as just 0A.
      # Furthermore it corrects 0.01A for the power usage of the plug.
      - lambda: if (x < (0.01 - 0.01)) return 0; else return (x - 0.01);
      name: "${hostname}_Voltage"
      unit_of_measurement: V
    # Calibration of 'filters'
      # Map from sensor -> measured value
      - calibrate_linear:
        - 0.0 -> 0.0
        - 251.9 -> 240
        - 252.7 -> 241
      name: "${hostname}_Wattage"
      unit_of_measurement: W
      id: "${hostname}_Wattage"
    # Calibration of 'filters' and 'lambda' 
      # Map from sensor -> measured value
      - calibrate_linear:
        - 0.0 -> 1.14
        - 11.3 -> 11.0
        - 13.3 -> 15.0
      # 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);
    change_mode_every: 8
    update_interval: 10s
  - platform: total_daily_energy
    name: "${hostname}_Total Daily Energy"
    power_id: "${hostname}_Wattage"
        # Multiplication factor from W to kW is 0.001
        - multiply: 0.001
    unit_of_measurement: kWh
# Extra sensor to keep track of plug uptime
  - platform: uptime
    name: "${hostname}_Uptime Sensor"

There is a lot about Kogan failures in this thread (sorry, very long but we do have search!)

I will post a repair topic for this as soon as the parts arrive. It’s a $1.20 component in most cases.

1 Like

Ok that gives me some comfort that the config isn’t causing early device failure. Was about to throw this last lot of failed devices out so will wait to see how to fix them. Thanks.

After travelling back and forth for a week my delivery of capacitors should be here tomorrow. So I’ll write something tomorrow night. Hopefully. If Toll don’t deliver it to Mars this time.

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Late reply but did you end up repairing/fixing them? I have 6 that are dead, seems a waste if just a capacitor or the likes?

Nope. There was actually more damage to other components.

And after about 80-90% failure rate just outside the warranty period (two different brands) I no longer use wifi smart plugs.

Zigbee CT clamps, zigbee smart plugs and Shelly WiFi modules are way more reliable.

Thanks for the quick reply.

Yeah and not easy to work with. I was just looking at the X2 Film capacitor you noted and looks like is BRT2-SS-205DM AFE 5V 5VDC 12A in my plugs. Way too hard to switch out even if one could find the correct spare…and no doubt other things may well be stuffed.

I’ll just have to look at something better. What Zigbee plugs (with evergy monitor) do you use if any?

Out of stock but this is what I purchased:

Whoo haha…@ $99 each is a tad expensive for my budget :slight_smile:

I also use the Meross MSS310 ones @ $49 pack of four when on special for 3+ years now and surprisingly all x 8 still working (unlike the Kogan ones). They are very wide though so not suitable for certain places but do work very well.

Thanks for the link though and will keep my eyes peeled on Zigbee options.

It was for a pair.