Airlytix ES1

Overview

The Airlytix ES1 is a comprehensive indoor environment sensor that runs ESPHome firmware on an ESP32 microcontroller. It measures nine environmental parameters across six high-quality Sensirion, Infineon, and Vishay sensors: particulate matter (PM1.0, PM2.5, PM4, PM10), volatile organic compounds (VOC), nitrogen oxides (NOx), carbon dioxide (CO2), temperature, humidity, barometric pressure, ambient light with color temperature, and sound levels.

Designed specifically for Home Assistant users, the ES1 connects over WiFi and is auto-discovered by the ESPHome integration. Each sensor reading is exposed as a separate entity in Home Assistant, plus a combined "State" entity that aggregates all readings into a simple good/fair/poor classification. An RGB traffic-light LED on the front of the device provides at-a-glance air quality feedback with configurable thresholds that can be adjusted directly from Home Assistant.

The firmware is fully open source with the complete ESPHome YAML configuration published on GitHub. Users can inspect, fork, and customize every aspect of the device behavior, from sensor polling intervals and Kalman filter fusion parameters to the indicator LED colors and threshold logic. The device ships in a compact 3D-printed enclosure (62.5 x 63 x 34mm) with wall-mounting clip, and is available as a fully assembled unit, a kit requiring mechanical assembly, or a bare PCB for custom enclosures.

The ES1 uses sensor fusion with Kalman filtering to combine temperature and humidity readings from both the SHT40 and SEN55 sensors for improved accuracy. CO2 readings from the SCD41 are automatically compensated using the barometric pressure from the DPS310 sensor. Setup is straightforward via a browser-based installer or WiFi hotspot provisioning, with no soldering required for any variant.