MoreSense MS-07 Air Quality Monitor with ESP32-S3 and SEN66

MoreSense MS-07 Air Quality Sensor

The MoreSense MS-07 indoor air quality monitor is based on the Sensirion SEN66 multisensor, an ESP32-S3 microcontroller and a 3.5-inch capacitive IPS touchscreen for local data visualization and control. At the heart of the MS-07 is the Sensirion SEN66 multi-sensor, a high-end module capable of measuring a broad spectrum of environmental parameters.

MS-07 also measures particulate matter of various sizes (PM1.0, PM2.5, PM4.0 and PM10) as well as basic temperature and humidity, CO₂, nitrogen oxides (NOx) and volatile organic compounds (VOCs). This is so much better than many DIY builds with cheaper or one-use sensors. MS-07 believes in privacy and local control. The device is generally used in homes, offices and indoor environment for air quality tracking and pollution metrics in real time.

MoreSense MS-07

MoreSense MS-07 Specifications:

• Processor: ESP32-S3 dual-core Xtensa LX7 microcontroller clocked at up to 240 MHz with 512KB SRAM, integrated 2.4GHz Wi-Fi, and Bluetooth LE connectivity
• Storage: Bundled 512MB microSD card for logging sensor measurements and storing audio content
• Display: 3.5-inch IPS capacitive touchscreen featuring a 480 × 320 resolution for live monitoring and interface control
• Audio: Integrated speaker for alerts, alarms, and audio playback
• USB Interface: USB Type-C connector used for power delivery and firmware programming
• Environmental Sensor:
  • Sensor Module: Sensirion SEN66 multi-parameter air quality sensor
  • Measurement Capabilities:
    • Temperature Range: -10°C to +60°C with ±0.45°C accuracy
    • Humidity Range: 0% to 100% RH with ±4.5% accuracy
  • Particulate Matter Detection:
    • PM1.0 / PM2.5: 0 to 1,000 µg/m³ with ±5 µg/m³ accuracy
    • PM4.0 / PM10: 0 to 1,000 µg/m³ with ±25 µg/m³ accuracy
  • Gas Monitoring:
    • CO₂ Measurement: 400 to 5,000 ppm with ±40 ppm + 5% reading accuracy
    • NOx Index: 1 to 500
    • VOC Index: 1 to 500
• Misc:
  • Battery status and reset buttons
  • Dedicated main power switch
  • Supports both desktop placement and wall mounting
  • Enclosed in a custom 3D-printed chassis
• Power:
  • Powered through a 5V USB Type-C input
  • Typical power consumption around 1W / 200mA
  • Integrated Panasonic NCR18650BD 3180mAh rechargeable battery providing up to 10 hours of runtime
• Dimensions: Approximately 105 × 96 × 35 mm including the stand

MS-07 Screen Layout and Features (AI Image)

MoreSense MS-07 uses the Sensirion SEN66 multisensor with Automatic Self-Calibration (ASC) that tracks the lowest CO₂ level over a period of 6.5 days and uses that as a 420 PPM fresh air baseline, with options for manual calibration with a custom reference value or outdoor air; the sensor is also rated for over 10 years of life. Measurements are automatically saved to CSV files on both internal storage and a microSD card with enough capacity to store more than a year of history. Such long-term tracking can be very useful to identify trends or to diagnose persistent air quality issues within indoor environments. Users can set their own thresholds on each metric that will trigger audible alerts or HTTP requests when limits are exceeded.

MS-07 Web UI

The ESP32-S3 firmware has a built-in web server where users can connect from any browser on the local network to a dashboard to view live gauges, analyze up to 1 year of historical data, change settings, and perform OTA firmware updates. It also supports MQTT and MQTT(S) with TLS for secure messaging and a REST API (HTTP GET) for direct data access, so you can integrate it with Home Assistant, Domoticz and Homey without the need for any cloud services. Users can set custom critical (red) and warning (orange) thresholds for each measured parameter for automation. Power is delivered by an integrated 3,180 mAh lithium-ion battery, offering around 10 hours of continuous operation, plus an Eco-mode that significantly increases runtime by decreasing the measurement frequency. 

The MoreSense MS-07 is available on Tindie for $199.00 or Lectronz for $197.68. It ships from the Netherlands (shipping starts at $15) and includes a 2-meter USB-A-to-USB-C cable. The device also features a 1-year warranty and a “no good, money back guarantee. 

Images used courtesy of Lectronz and Tindie.