Adafruit HTU21D-F Temperature and Humidity Sensor Breakout
Overview
The Adafruit 1899 is a precision breakout board featuring the HTU21D-F digital sensor, capable of measuring both relative humidity and ambient temperature. It communicates via a standard I2C interface and includes an onboard 3.3V regulator and level shifting circuitry to support both 3V and 5V logic levels. This module is designed for rapid prototyping with a breadboard-friendly header layout.
Why Choose This Part
This breakout features a built-in PTFE filter to protect the sensor element from dust and water droplets, ensuring long-term reliability. The inclusion of voltage regulation and level shifting makes it plug-and-play with almost any microcontroller architecture without needing external logic converters.
Applications
Getting Started
Connect the VIN pin to 3-5VDC, GND to ground, and the SCL/SDA pins to your microcontroller I2C bus. Adafruit provides a dedicated HTU21DF library for Arduino and CircuitPython, allowing users to read data with just a few lines of code. Ensure the I2C pull-up resistors are appropriate for your bus speed, though the board includes 10K resistors by default.
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