Hoje resolvi iniciar a implementação prática da minha estação Climaduino e Monitora Cerrado através do sensor DHT-22. Segue o esquema de pinagem e esquema de ligação do sensor.
1-Vcc
2-Dados
3-N/C
4-GND
Existem várias maneiras de se capturar os dados, inclusive usando a biblioteca do DHT-22.
http://arduino.cc/playground/Main/DHTLib
É importante fazer o download da biblioteca e colocar na pasta librarie do Arduino.
https://github.com/adafruit/DHT-sensor-library
Segunda opção:
https://github.com/ringerc/Arduino-DHT22
http://arduino.cc/playground/Interfacing/Java
http://www.ladyada.net/learn/sensors/dht.html
http://paulo.blog.br/blog/climaduino-projeto-monitoracerrado/
1-Vcc
2-Dados
3-N/C
4-GND
Existem várias maneiras de se capturar os dados, inclusive usando a biblioteca do DHT-22.
http://arduino.cc/playground/Main/DHTLib
- // Example testing sketch for various DHT humidity/temperature sensors
- // Written by ladyada, public domain
- #include "DHT.h"
- #define DHTPIN 2 // 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, DHT22);
- 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");
- }
- }
É importante fazer o download da biblioteca e colocar na pasta librarie do Arduino.
https://github.com/adafruit/DHT-sensor-library
Segunda opção:
https://github.com/ringerc/Arduino-DHT22
http://arduino.cc/playground/Interfacing/Java
http://www.ladyada.net/learn/sensors/dht.html
http://paulo.blog.br/blog/climaduino-projeto-monitoracerrado/