Humedad y temperatura con Arduino y SI7021

Introduction about this 

SMD MINI Si7021 Temp and Humidity Sensor I2C Interface for Arduino

Specifications

1. Operating voltage: 1.9-3.6V (recommended 3.3V)

2. Standby current: 60nA

3. Temperature range: -40 - 85 ℃ (Recommended -10 - 60 ℃)

4. Temperature accuracy: ± 0.4 ℃ (-10 - 85 ℃)

5. Humidity range: 0-100% RH (recommended 20% - 80% RH)

6. Humidity Accuracy: ± 3% RH (0-80% RH)

7. Temperature conversion time: 7ms

8. Humidity conversion time: 17ms (temperature conversion will occur automatically when the humidity conversion)

9. Interface Type: I2C 2.54mm pad pitch

10. Module size: 8.5*10mm

If we look atthe module IcStation carefully we see that already included on the plate the 
two resistors, so it is not necessary to include them on our own and also includes 
capacitor 0.1 uF you need integrated between Vcc and GND to stabilize its feeding.

 
Look what RincónIngenieril share with us: 

Application:

1. Assets and asset tracking

2. Auto climate control and defogging

3. Baby Monitors

4. Continuous Positive Airway Pressure (CPAP) machine

5. Flooding and water detector

6. Gas, fire and smoke detectors

7. Mobile / Smart Phone

8. Industrial HVAC / R

9. Notebook / Tablet PC

10. laser printer

11. Microenvironment / Data Center

12. PLC and IO Modules

13. Remote telemetry device

14. tablet

15. Test and Measurement

16. Thermostat / humidistat

17. Ventilation and air conditioning systems

18. Stations

19. Wind Power Inverter

20. Windshield and mirror system

21. The radio base station

22. Wireless sensor networks