Crowbits-DHT11 Sensor
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Description
Temperature and humidity sensors refer to devices or devices that can convert temperature and humidity into electrical signals that can be easily measured and processed.
Features
- Digital reading accuracy
Specification
- Interface Type:GPIO
- Operating Voltage: 3.3V DC
- Dimensions: 31.5(L)*24.5(W)*13(H)mm
Application Ideas
Display test information
Usage
The following sketch demonstrates a simple application.
1. You need to prepare a Crowbits motherboard, such as Crowbits-UNO board.
2. Connect the module to the A0 interface on the Crowbits-UNO board, as shown in the figure:
3. Download the library Crowbits-DHT11 Sensor library. Unzip and put it in the libraries file, for example: C:\Program Files (x86)\Arduino\libraries.
4. Upload the following code to the Crowbits-UNO board.
// Example testing sketch for various DHT humidity/temperature sensors // Written by ladyada, public domain #include "DHT.h" #define DHTPIN A0 // 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"); } }
5.After the code is uploaded successfully, Open the debug window and observe the displayed humidity and temperature.