snap-read

// snap-read
//
// this is an example of "snap-read" by coltivino maker.
// coltivino@gmail.com
// 
// Connections on Arduino:
// 
// digital pin 2: connect a relay as normally open (it will be ON when LOW is set).
//                The relay may control a depurator or water pump.
//                
// analog pin A0: connect the signal of the sensor.
// 
// digital pin 12: connect the "+" of the sensor.
// 
// GND: connect the GND from the sensor.
// 
// The relay "+" and "-" must be connected as necessary, depending on its circuit.


int rel_osm = 2;
int sens_lev_wat = A0;
int lev_wat;
int val_lev_wat;
void setup() {
Serial.begin (9600);

pinMode (12, OUTPUT);
pinMode (rel_osm, OUTPUT);
pinMode (sens_lev_wat, INPUT);
}

void loop(){

digitalWrite(12, HIGH);

lev_wat = analogRead(sens_lev_wat);
val_lev_wat = map(lev_wat, 0, 1023, 0, 100);

if (val_lev_wat < 10)
{
digitalWrite(rel_osm, LOW);
digitalWrite(12, LOW);
}
else 
{
digitalWrite(rel_osm,HIGH);
digitalWrite(12, LOW);
}

delay (10000);

Serial.print("Livello dell'acqua: ");
Serial.print(val_lev_wat);
Serial.println(" cm.");
 
}