Printing the value only once to Serial Monitor

Projects Programming
1

I am working on YF-S201 Water Flow Sensor and here is my code

byte statusLed    = 13;
byte sensorInterrupt = 0;  
byte sensorPin       = 2;
float calibrationFactor = 4.5;
volatile byte pulseCount;  
float flowRate;
unsigned int flowMilliLitres;
unsigned long totalLitres;
unsigned long oldTime;
int x=0;
void setup()
{
 Serial.begin(38400);
 pinMode(statusLed, OUTPUT);
 digitalWrite(statusLed, HIGH);   
 //digitalWrite(statusLed, LOW); 
 pinMode(sensorPin, INPUT);
 digitalWrite(sensorPin, HIGH);
 pulseCount        = 0;
 flowRate          = 0.0;
 flowMilliLitres   = 0;
 totalLitres  = 0;
 oldTime           = 0;
 attachInterrupt(sensorInterrupt, pulseCounter, FALLING);
}


void loop()
{
if((millis() - oldTime) > 1000)    
{ 
 detachInterrupt(sensorInterrupt);
 flowRate = ((1000.0 / (millis() - oldTime)) * pulseCount) / calibrationFactor;
 oldTime = millis();
 flowMilliLitres = (flowRate / 60) * 1000;
 totalLitres += flowMilliLitres;
 unsigned int frac;
 Serial.print("Flow rate: ");
 Serial.print(int(flowRate));  
 Serial.print(".");             
 frac = (flowRate - int(flowRate)) * 10;
 Serial.print(frac, DEC) ;      
 Serial.print("L/min");
 Serial.print("  Output Liquid Quantity: ");             
 Serial.print(float(totalLitres)/1000);
 Serial.println("L"); 
 
 pulseCount = 0;
 attachInterrupt(sensorInterrupt, pulseCounter, FALLING);
}
}
void pulseCounter()
{
pulseCount++;
}

Please make changes so that totalLitres value will be displayed once after calculating the whole value and repost the code.
Thank You

2

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Please make changes so that totalLitres value will be displayed once after calculating the whole value and repost the code.

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