Unit KMeter-ISO Home Assistant Integration

This section describes the configuration methods and practical steps for integrating the Unit KMeter-ISO sensor into Home Assistant.

1. Preparation

Environment Setup

1. Install Home Assistant by following the official Home Assistant documentation.
2. Install the ESPHome Device Builder add-on by following the official ESPHome documentation.
3. Refer to the following resources:

• MAX31855KASA+ Datasheet
• Communication Protocol
• KMeterISO ESPHome

Hardware Products

• Unit KMeter-ISO
• A compatible controller (such as an Atom, Stamp, Stick, Core, or Basic series device)

2. Modify Configuration

1. The I²C component needs to be enabled in the ESPHome configuration:

# Example configuration entry for ESP32
i2c:
  sda: GPIOXX
  scl: GPIOXX
  scan: true

The GPIO pins here will vary depending on the main controller used. For example, using Atom Lite as the controller:

# I2C Bus on Grove Port (HY2.0-4P)
i2c:
  sda: GPIO26
  scl: GPIO32

Unit KMeterISO Configuration Example:

sensor:
  - platform: kmeteriso
    temperature:
      name: "KMeterISO Temperature"
    internal_temperature:
      name: "Internal Temperature"
    update_interval: 10s

3. Getting Started

Once added to the Dashboard, you can view the sensor data in Home Assistant.