sáng tạo với cảm biến RAIN WATER SENSOR

CODE THAM KHẢO

byte statusLed = 13;

byte sensorInterrupt = 0; // 0 = digital pin 2

byte sensorPin = 2;

float calibrationFactor = 4.5;

volatile byte pulseCount;

float flowRate;

unsigned int flowMilliLitres;

unsigned long totalMilliLitres;

unsigned long oldTime;

void setup()

{

// Initialize a serial connection for reporting values to the host

Serial.begin(9600);

// Set up the status LED line as an output

pinMode(statusLed, OUTPUT);

digitalWrite(statusLed, HIGH); // We have an active-low LED attached

pinMode(sensorPin, INPUT);

digitalWrite(sensorPin, HIGH);

pulseCount = 0;

flowRate = 0.0;

flowMilliLitres = 0;

totalMilliLitres = 0;

oldTime = 0;

attachInterrupt(sensorInterrupt, pulseCounter, FALLING);

}

void loop()

{

if ((millis() - oldTime) > 1000) // Only process counters once per second

{

detachInterrupt(sensorInterrupt);

flowRate = ((1000.0 / (millis() - oldTime)) * pulseCount) / calibrationFactor;

oldTime = millis();

flowMilliLitres = (flowRate / 60) * 1000;

totalMilliLitres += flowMilliLitres;

unsigned int frac;

// Print the flow rate for this second in litres / minute

Serial.print("Flow rate: ");

Serial.print(int(flowRate)); // Print the integer part of the variable

Serial.print("L/min");

Serial.print("\t"); // Print tab space

// Print the cumulative total of litres flowed since starting

Serial.print("Output Liquid Quantity: ");

Serial.print(totalMilliLitres);

Serial.println("mL");

Serial.print("\t"); // Print tab space

Serial.print(totalMilliLitres / 1000);

Serial.print("L");

// Reset the pulse counter so we can start incrementing again

pulseCount = 0;

// Enable the interrupt again now that we've finished sending output

attachInterrupt(sensorInterrupt, pulseCounter, FALLING);

}

}

/*

Insterrupt Service Routine

*/

void pulseCounter()

{

// Increment the pulse counter

pulseCount++;

}

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