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count down 

simple count down un lcd display
This commit is contained in:
Sergio Álvarez 2016-02-14 16:00:04 +01:00
parent a28b1ec400
commit fe035a4732
1 changed files with 48 additions and 46 deletions
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94
sketch_lcd/sketch_lcd.ino
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@ -11,65 +11,67 @@
// init
DHT dht(DHT_APin, DHT_Type);
LiquidCrystal lcd(9, 10, 4, 5, 6, 7); // syntax: LiquidCrystal(rs, enable, d4, d5, d6, d7)
LiquidCrystal lcd(9, 10, 4, 5, 6, 7); // syntax: LiquidCrystal(rs, enable, d4, d5, d6, d7)
// defs
int ledPin = 13;
int timer = 0;
void setup() { // put your setup code here, to run once:
Serial.begin(9600);
dht.begin();
lcd.begin(16, 2);
pinMode(ledPin, OUTPUT);
lcd.print(" hue hue");
lcd.setCursor(0, 2);
lcd.print(" boot");
delay(500);
lcd.print(".");
delay(500);
lcd.print(".");
delay(500);
lcd.print(".");
delay(1000);
pinMode(13, OUTPUT); // 13 es el pin con el led
lcd.print(" hue hue hue");
}
void loop() { // put your main code here, to run repeatedly:
timer--;
// 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(); // lectura en Celsius, readTemperature(true) para Fahrenheit
if (timer <= 0) {
// 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(); // lectura en Celsius, readTemperature(true) para Fahrenheit
if (isnan(h) || isnan(t)) {
Serial.println("E"); // E = error, para el script en python que lee
return;
if (isnan(h) || isnan(t)) {
Serial.println("E"); // E = error, para el script en python que lee
return;
}
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false); // sensación térmica
// D = DHT, para el script en python que leerá esto
Serial.print("D h:");
Serial.print(h);
Serial.print(" t:");
Serial.print(t);
Serial.print(" i:");
Serial.print(hic);
Serial.println("");
lcd.clear();
lcd.print(t);
lcd.print("C ");
lcd.print(h);
lcd.print("%");
lcd.setCursor(0, 2);
lcd.print(hic);
lcd.print("C");
digitalWrite(13, HIGH);
delay(100);
digitalWrite(13, LOW);
//delay(60000); // 1 minuto
timer = 60;
}
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false); // sensación térmica
// D = DHT, para el script en python que leerá esto
Serial.print("D h:");
Serial.print(h);
Serial.print(" t:");
Serial.print(t);
Serial.print(" i:");
Serial.print(hic);
Serial.println("");
lcd.clear();
lcd.print(t);
lcd.print("C ");
lcd.print(h);
lcd.print("%");
lcd.setCursor(0, 2);
lcd.print(hic);
lcd.print("C");
digitalWrite(ledPin, HIGH);
delay(100);
digitalWrite(ledPin, LOW);
delay(60000); // 1 minuto
lcd.setCursor(14, 2);
if (timer < 10)
lcd.print(0);
lcd.print(timer);
delay(1000);
}