I2C Temperature Humidity Sensor, 3.3V-5.5V

I2C temperature humidity sensor is a compact and energy-efficient device designed for reliable environmental monitoring. Featuring a temperature range of -40~+80℃ and a humidity range of 0~99.9%RH, SUCH temp and humidity sensor delivers high accuracy of ±0.5℃ and ±3%RH (at 25℃). Built with a capacitive humidity element and a precision temperature sensor, it provides stable, compensated digital outputs without the need for secondary calculations. Supporting both single-bus and I²C communication, with a simple 4-wire connection and signal transmission distance over 20 meters, this sensor ensures easy integration, flexible operation, and wide applicability in home, industrial, agricultural, and demanding environmental scenarios.

Feature

• Low Power Consumption: Extremely low energy usage makes it suitable for long-term continuous monitoring.
• Dual Communication Modes: Supports both single-bus and standard I²C communication, providing flexible integration options.
• Easy System Integration: Standard single-bus interface enables quick and simple system setup without complex wiring.
• Long Transmission Distance: Signal transmission distance exceeds 20 meters, ideal for diverse applications.
• High Accuracy & Stability: Built with a capacitive humidity sensing element and a high-precision temperature sensing element, ensuring reliable and accurate readings.
• Temperature Compensation: Provides direct compensated humidity and temperature digital outputs without requiring secondary calculations.
• Flexible Switching: Users can freely switch between communication modes for convenient operation.
• 4-Wire Connection: Simple 4-pin interface makes installation and wiring easy.
• Compact Size: Ultra-small design allows easy integration into space-constrained applications.
• Wide Application Range: Humidity sensor device suitable for home, industrial, agricultural, and even demanding environmental monitoring scenarios.

Dimension

Pin Assignment

The SCL pin is used to select the communication mode of the sensor and serves as the clock line during I²C communication. When powered on, if SCL is held low for 500 ms or continuously remains low, it indicates that the user has selected the single-bus communication mode; otherwise, I²C communication is used. Once the communication mode is selected, it remains unchanged during the power cycle. To change the communication mode, the device must be powered off and restarted, following the required operation procedure. When I²C communication is selected, SCL is used for synchronization between the microcontroller and the Temperature & Humidity Sensor.