SI7021 HUMIDITY AND TEMPERATURE SENSOR MODULE

SI7021 I2C based Temperature and Humidity Sensor Module

This Module is based on Silicon Labs Si7021 a low-cost, easy to use, highly accurate, digital temperature and humidity sensor. All you need is two lines for I2C communication, and you’ll have relative humidity readings and accurate temperature readings as well! This sensor is ideal for environmental sensing and data logging, perfect for a weather station or humidor control system. 

The Si7021 Humidity & Temperature Sensor Module also comes equipped with a hydrophobic PTFE filter covering the inlet on the sensor. This filter blocks contaminants but allows water vapor to pass through, keeping your sensor safe from water damage while still proving accurate sensor  readings.

Specifications of SI7021 HUMIDITY AND TEMPERATURE SENSOR MODULE

• Uses the I2C interface

• Typical humidity accuracy of ±2%

• Typical temperature accuracy of ±0.3 C

• Operates from 0 to 100% humidity but this sensor isn’t recommended for harsh environments where it could come in contact with water (such as rain)

• 3.3 Volt sensor - use inline logic level converters or 10 kΩ resistors to limit 5 Volt signals

• Only one Si7021 sensor can reside on the I2C bus at a time

Related Links

• SI7021 Arduino Github Library

• SI7021 Arduino Interfacing

• Make a Hygrometer using SI7021 and Raspberry PI

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