uThing::VOC

Air-quality (VOC), eCO2, temperature, humidity & pressure

Description:

uThing::VOC™ is a USB dongle for monitoring indoor air-quality sensor. It is built around the Bosch BME680™ MEMS sensor and a powerful STM32 microcontroller.

Gases that can be detected include Volatile Organic Compounds (VOC) from paints (such as formaldehyde), lacquers, paint strippers, cleaning supplies, furnishings, office equipment, glues, adhesives and alcohol.

It's designed for easy integration into custom applications, gateways, or for quick proof-of-concept projects.

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Key Features:

Primary Sensor: Bosch BME680 MEMS sensor.
Core Processor: STMicroelectronics ARM Cortex-M4.
Onboard Intelligence: Uses Bosch's proprietary BSEC algorithms to process raw sensor data into meaningful metrics.
Simple Connectivity: Plugs into any USB host (Linux, macOS, Windows, Android) and works as a standard Virtual COM Port (VCP) with no drivers needed.
Flexible Output: Provides data in JSON (default), CSV, or a human-readable format.

Sensor Metrics:

Estimated Ambient Temperature [°C]
Relative Humidity [% RH]
Sensor raw resistance [Ω]
Atmospheric pressure [hPa]
Air Quality Index (IAQ) [0-500]
IAQ accuracy [0-3]
Equivalent CO2 ("eCO2") [p.p.m.]
Equivalent "breathVOC"

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Output Formats:

JSON:

{"temperature": 24.68, "pressure": 1019.38, "humidity": 45.64, "gasResistance": 597617, "IAQ": 28.3, "iaqAccuracy": 3, "eqCO2": 511.21, "eqBreathVOC": 0.52}

CSV:

#Columns: [temperature], [pressure], [humitidy], [gasResistance], [IAQ], [accuracy], [eqCO2], [eqBreathVOC]
24.65, 1019.42, 46.23, 597617, 26.9, 2, 506.7, 0.51,

Specifications:

Data reporting rate: configurable between 3 seconds and 1 hour
Operating range: -40 ‒ +85 °C, 10‒90 %r.H., 300‒1100 hPa
IAQ Range: 0-500.
Sensor-to-sensor IAQ deviation: ±15% (1)
Temperature resolution: 0.01 °C
Absolute temperature accuracy @25 °C: ±0.5 °C (2)
Humidity accuracy tolerance: ±3% r.H.
Humidity resolution: 0.008% r.H
Power consumption: 125 mW / 5V - 25mA

Connector Type:

USB Type A - Male

Dimensions:

18.7 W x 44.5 L x 11.1 H [mm]

Weight:

5.6 g

Check the full documentation

uThings Docs

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