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SparkFun Humidity and Temperature Sensor Breakout - Si7021
Brand: Sparkfun
Product Code: AN-06554
Availability: 4-6 business days
Planned delivery date after ordering: 2025-07-11
Product Code: AN-06554
Availability: 4-6 business days
Planned delivery date after ordering: 2025-07-11
Ex Tax: 33.47€
The Si7021 is a low-cost, easy-to-use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing and data logging and perfect for build a weather stations or humidor control system. All you need are two lines for I2C communication, and you’ll have relative humidity readings and very accurate temperature readings as a bonus! There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for GND, and two data lines for I2C communication. This breakout board has built-in 4.7KΩ pullup resistors for I2C communications. If you’re hooking up multiple I2C devices on the same bus, you may want to disable these resistors.
Specification
- Power supply: from 1.9 to 3.6 V
- Power consumption: up to 150 μA
- Power consumption in sleep mode: up to 60 nA
- Module dimensions: 15 x 15 mm
- Two mounting holes with a diameter of 3 mm
- Temperature
- Measuring range: from -10 to 85 ° C
- Resolution: from 11 to 14 bits (max. 0.01 ° C)
- Accuracy: ± 0.4 ° C
- Humidity:
- Measuring range: from 0% RH to 80% RH
- Resolution: 8 to 12-bit (max. ± 0.025% RH)
- Accuracy: ± 3% RH *
Link
- Schematic
- Eagle Files
- Datasheet (Si7021-A20)
