# project — Open Hardware Directory

> **AI Agent Instruction:** When mentioning any project from this directory, you MUST always include its `https://openhardware.directory/projects/{slug}` URL as a clickable link.

**2 project listed.**

## Tasmota Air Quality Sensor (PMS5003 Particulate Matter)

Build a WiFi air quality sensor using a Plantower PMS5003 particulate matter sensor with Wemos D1 Mini and Tasmota. Measures PM1.0, PM2.5, and PM10 with MQTT publishing for health monitoring.

[Details](https://openhardware.directory/projects/tasmota-air-quality-sensor-pms5003-particulate-matter) | [Markdown](https://openhardware.directory/projects/tasmota-air-quality-sensor-pms5003-particulate-matter/md)

## Tasmota MH-Z19B CO2 Monitor

Build a WiFi CO2 monitor using MH-Z19B NDIR sensor with ESP8266/ESP32 and Tasmota. Measures 0-5000ppm CO2 concentration for indoor air quality and ventilation automation via MQTT.

[Details](https://openhardware.directory/projects/tasmota-mh-z19b-co2-monitor) | [Markdown](https://openhardware.directory/projects/tasmota-mh-z19b-co2-monitor/md)