Crowtail- Temperature& Humidity Sensor
Contents
Description
This module can help you detect the temperature and humidity of the environment of your house. The module contains a DHT11 temperature & humidity senorthat is a complex sensor with a calibrated digital signal out.It use digital module acquisition technology and the temperature&humidity sensor technology.Sensor consists of a resistance type moisture element and a NTC temperature measuring element. Because of single wire serial interface, it is easy to use the module.
Model: CT0010TH
Specification
- Work Voltage: 3.3V ~ 5V
- Measuring Range:
Humidity: 20% - 90% RH Temperature: 0 ~ 50 °C
- Accuracy:
Humidity: ±5% RH Temperature: ±2°C
- Sensitivity:
Humidity: ±1% RH Temperature: 1°C
- Signal Collecting Period: 2S
- Dimensions(mm):40.0(L)x20.0(W)x7.6(H)
Usage
This demo is going to show you how to read temperature and humidity information from this Crowtail - Temperature and Humidity Sensor.
1.Hardware Connection
The Temperature and Humidity sensor is connecting to digital port D5 of Crowtail - Base Shield.
2.Download Temperature_humidity_sensor library for Arduino boards with 16MHz XTAL; Unzip and put it in the libraries file of Arduino IDE by the path: ..\arduino-1.0\libraries;
3.Open “DHTtester” example via the path: File --> Examples --> Humidity_Temperature_Sensor --> DHTtester.
// Example testing sketch for various DHT humidity/temperature sensors #include "DHT.h" #define DHTPIN 5 // what pin we're connected to // Uncomment whatever type you're using! #define DHTTYPE DHT11 // DHT 11 //#define DHTTYPE DHT22 // DHT 22 (AM2302) //#define DHTTYPE DHT21 // DHT 21 (AM2301) // Connect pin 1 (on the left) of the sensor to +5V // Connect pin 2 of the sensor to whatever your DHTPIN is // Connect pin 4 (on the right) of the sensor to GROUND // Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor DHT dht(DHTPIN, DHTTYPE); void setup() { Serial.begin(9600); Serial.println("DHTxx test!"); dht.begin(); } void loop() { // Reading temperature or humidity takes about 250 milliseconds! // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor) float h = dht.readHumidity(); float t = dht.readTemperature(); // check if returns are valid, if they are NaN (not a number) then something went wrong! if (isnan(t) || isnan(h)) { Serial.println("Failed to read from DHT"); } else { Serial.print("Humidity: "); Serial.print(h); Serial.print(" %\t"); Serial.print("Temperature: "); Serial.print(t); Serial.println(" *C"); } }
4.Upload it into your Arduino board and open the serial monitor to observe the temperature and relative humidity information of the environment.