Compact, easytouse temperature and humidity breakout based on the HTU21D digital sensor. The module delivers factorycalibrated humidity and temperature readings over a standard I2C interface, letting you add reliable environmental sensing to projects with minimal wiring and code. Why you need this Accurate, factorycalibrated measurements without manual calibration, so your project gets reliable humidity and temperature data out of the box. Digital I2C output removes the need for analog conversion and complex signal conditioning. Small breakout format makes integration into prototypes, embedded systems, and finished products straightforward. Key benefits Simple integration: Fourwire I2C connection (SDA, SCL, VCC, GND) works with Arduino, Raspberry Pi, ESP series, and most microcontrollers. Readytouse breakout: The HTU21D chip is mounted on a compact PCB with clearly labeled pins for breadboard or wire connections. Low power and fast response: Designed for embedded and batterypowered systems where efficient, responsive sensing is required. Factorycalibrated sensor: Delivers consistent humidity and temperature readings without the need for user calibration. Key attributes Sensor model: HTU21D digital humidity and temperature sensor. Interface: I2C digital communication for direct integration with common microcontrollers and singleboard computers. Form factor: Compact breakout PCB for easy wiring and breadboard compatibility. Accuracy and stability: Factorycalibrated sensor designed for reliable environmental sensing in a variety of applications. Materials and construction: HTU21D SMD sensor mounted on a small PCB breakout with labeled pins for VCC, GND, SDA, and SCL. Compatibility Works with Arduino, Raspberry Pi, ESP8266/ESP32, STM32, and other microcontrollers that support I2C. Compatible with common development environments and libraries for quick prototyping and deployment. Typical applications Indoor environmental monitoring and home automation: Monitor humidity and temperature to control ventilation, humidifiers, or HVAC systems. Weather or datalogging stations: Add a compact, calibrated sensor for reliable environmental records. Consumer and industrial devices: Integrate into smart appliances, greenhouses, incubators, or instrument enclosures where accurate environmental feedback is required. What to expect A compact HTU21D breakout board that exposes the sensor's digital I2C pins for straightforward wiring and software support. A dependable, factorycalibrated sensor suitable for prototyping and final designs where accurate humidity and temperature readings are needed. Notes for use Connect SDA and SCL to your controller's I2C pins, and VCC/GND to the appropriate supply. Use existing HTU21D libraries or standard I2C routines for reading sensor data. Ensure the sensor is exposed to the air you want to measure; avoid sealing it behind impermeable barriers. The HTU21D temperature and humidity sensor breakout provides a compact, reliable, and easytointegrate solution for adding calibrated environmental sensing to a wide range of projects.