Bonsoir, je viens vous demander de l'aide pour mon capteur d'humidité et température. Quand je téléverse mon programme dans la Carte Arduino Uno, j'ouvre le moniteur série et voilà le problème que je rencontre :
" Read failFailed to read from DHT
Humidity: 0.00 % Temperature: 0.00 *C
Humidity: 0.00 % Temperature: 0.00 *C
Humidity: 0.00 % Temperature: 0.00 *C"
serait est ce un problème au niveau de mon programme ? de la bibliothèque que j'utilise ? ou autre ?
Merci bien !
(Ps: Voici mon programme )
(J'utilise le capteur temperature and humidity sensor Pro v1.3 de Grove et une Base Shield V2)
#include <DHT.h>
// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#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, 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");
}
}