Adafruit HDC3021 Precision Temperature & Humidity Sensor
The Adafruit HDC3021 is a high-precision I²C temperature and humidity sensor breakout featuring the TI HDC302x series chip. With typical humidity accuracy of ±0.5% RH (and just 0.19% long-term drift) and temperature accuracy of ±0.1°C, it's one of the most accurate environmental sensors available at this price point.
The sensor operates across 1.8–5V power and logic levels with no external level shifters required, making it compatible with virtually any microcontroller or single-board computer. Four selectable I²C addresses allow multiple sensors on one bus for multi-zone monitoring. STEMMA QT / Qwiic connectors on the breakout enable solderless I²C connections.
Key Features
- ±0.5% Typical Humidity Accuracy – With 0.19% long-term drift for reliable readings over time
- ±0.1°C Typical Temperature Accuracy – High-precision environmental monitoring
- I²C Interface – Simple two-wire digital communication
- 4 Selectable I²C Addresses – Run multiple sensors on one bus
- 1.8–5V Compatible – No level shifters needed for any common microcontroller
- STEMMA QT / Qwiic Connectors – Solderless I²C connection
- Configurable Settings – Adjustable sensor rate, power mode, heater, alerts, and offsets
- NIST Tracking ID – Built-in traceability for calibration and compliance
- Arduino and CircuitPython Libraries – Full-featured driver support with example code
Ideal For
- High-precision environmental monitoring
- Indoor air quality and HVAC systems
- Multi-zone temperature and humidity tracking
- Scientific and industrial data logging
Package Contents
- 1× Adafruit HDC3021 Breakout Board – Fully assembled and tested with STEMMA QT connectors
- 1× Header strip (unsoldered)
Resources
Original: $17.33
-70%$17.33
$5.20Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Adafruit HDC3021 is a high-precision I²C temperature and humidity sensor breakout featuring the TI HDC302x series chip. With typical humidity accuracy of ±0.5% RH (and just 0.19% long-term drift) and temperature accuracy of ±0.1°C, it's one of the most accurate environmental sensors available at this price point.
The sensor operates across 1.8–5V power and logic levels with no external level shifters required, making it compatible with virtually any microcontroller or single-board computer. Four selectable I²C addresses allow multiple sensors on one bus for multi-zone monitoring. STEMMA QT / Qwiic connectors on the breakout enable solderless I²C connections.
Key Features
- ±0.5% Typical Humidity Accuracy – With 0.19% long-term drift for reliable readings over time
- ±0.1°C Typical Temperature Accuracy – High-precision environmental monitoring
- I²C Interface – Simple two-wire digital communication
- 4 Selectable I²C Addresses – Run multiple sensors on one bus
- 1.8–5V Compatible – No level shifters needed for any common microcontroller
- STEMMA QT / Qwiic Connectors – Solderless I²C connection
- Configurable Settings – Adjustable sensor rate, power mode, heater, alerts, and offsets
- NIST Tracking ID – Built-in traceability for calibration and compliance
- Arduino and CircuitPython Libraries – Full-featured driver support with example code
Ideal For
- High-precision environmental monitoring
- Indoor air quality and HVAC systems
- Multi-zone temperature and humidity tracking
- Scientific and industrial data logging
Package Contents
- 1× Adafruit HDC3021 Breakout Board – Fully assembled and tested with STEMMA QT connectors
- 1× Header strip (unsoldered)
