Atelier1 - 6 Septembre 2018 : Différence entre versions

#include <SimpleDHT.h>
#include "Nokia_5110.h"
// Our pins were set as on presentation
#define RST 7
#define CE 6
#define DC 5
#define DIN 4
#define CLK 3
#define BL 2

Nokia_5110 lcd = Nokia_5110(RST, CE, DC, DIN, CLK);

// for DHT22, 
//      VCC: 5V or 3V
//      GND: GND
//      DATA: 15
int pinDHT22 = 15;
// Defining sensor pins
SimpleDHT22 dht22(pinDHT22);

void setup() {
  // Setting serial rate
  Serial.begin(115200);
  // Setting lcd contrast
  lcd.setContrast(60); // 60 is the default value set by the driver
  // Defining BL pin as an output with value ON
  pinMode(BL, OUTPUT);
  digitalWrite(BL, HIGH);
}

void loop() {
  // Clearing LCD screen...
  lcd.clear();
  // Initializing logs
  Serial.println("=================================");
  Serial.println("Sample DHT22...");
  
  // read without samples.
  // Remark : We use read2 to get a float data, such as 10.1*C
  //    if user doesn't care about the accurate data, use read to get a byte data, such as 10*C.
  float temperature = 0;
  float humidity = 0;
  int err = SimpleDHTErrSuccess;
  if ((err = dht22.read2(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
    // Printing error on LCD display
    lcd.println("Reading error from sensor");
    lcd.println(err);
    // Printing error in logs
    Serial.print("Read DHT22 failed, err="); 
    Serial.println(err);
    // Delaying next mesure
    delay(2000);
    // Returning for new loop
    return;
  }
  // Printing Temperature
  lcd.println("Temperature : ");
  lcd.print(temperature);
  lcd.println(" *C");
  
  // Printing humidity
  lcd.println("Humidite : ");
  lcd.print(humidity);
  lcd.println(" %HR");
  
  // Logs for debugging
  Serial.print("Sample OK: ");
  Serial.print((float)temperature); Serial.print(" *C, ");
  Serial.print((float)humidity); Serial.println(" RH%");
  
  // DHT22 sampling rate is 0.5HZ.
  delay(2500);
}