Atom Socket Home Assistant Integration

Introduction

Atom Socket is a smart power socket compatible with the ATOM controller. It integrates the HLW8032 high-precision energy metering IC, enabling measurement of voltage, current, power, and power factor via serial communication. The socket follows Japanese standards and includes a single-channel relay (AC 100–120V, 10A) for power control. When paired with a Wi-Fi–enabled ATOM controller, it supports remote control and energy monitoring. An onboard HY2.0-4P interface allows interaction with external devices, such as relay signal input and button signal output.

Preparation

• Home Assistant host
• Install and enable ESPHome Builder in Home Assistant

Step 1. Create New Device

• Click the green button in the lower right corner to create a device.

Step 2. Create Device Name

• Click CONTINUE.

• Click New Device Setup.

• Enter the name of the device and click NEXT.

Step 3. Choose Device Type

• Click ESP32.

• Click SKIP.

Step 4. Start Edit YAML File

• Click EDIT. We can customize device functionality through YAML files.

Device Setup

The following is the core part of the code. Relevant references and explanations are provided below.

Sensor Configuration

• Add the Sensor components

• The primary chip module is the HLW8032 energy metering chip, which is responsible for collecting and reading sensor data such as voltage, current, and power.

sensor:
  - platform: hlw8032
    voltage:
      name: HLW8032 Voltage
      id: hlw8032_voltage
    current:
      name: HLW8032 Current
      id: hlw8032_current
    power:
      name: HLW8032 Power
      id: hlw8032_power
    apparent_power:
      name: HLW8032 Apparent Power
      id: hlw8032_apparent_power
    power_factor:
      name: HLW8032 Power Factor
      id: hlw8032_power_factor

Switch Configuration

• Add the Switch components

switch:
  - platform: gpio
    name: "Atom Socket"
    pin:
      number: GPIO23
      inverted: False
    restore_mode: ALWAYS_ON

Firmware Build

• Click INSTALL again to flash and wait for it to complete.

• After making changes, click SAVE and INSTALL in the top-right corner, then choose Manual Download in the popup.

• After the firmware compilation is complete, click Download and select Factory format(Previously Modern)

Firmware Upload

• Connect the device to your host via a USB Type‑C cable. Open ESPHome Web and click CONNECT to connect to the device.

• Locate the corresponding serial port number

• Click INSTALL

• Select the previously compiled firmware to upload.

Home Assistant Integration

• Click Settings -> Device & services to check the device.

• We can find the corresponding device in the Discover section.

• After adding the device, the data will be displayed correctly.

• Finally, we add these entities to the Dashboard, and the following shows their display results.