I need help... four flow meter to arduino mega.

Projects Programming
5

Great . pull-ups (2k) works. pull ups (2K ohm) to modify the flow sensor, PNP. a small change to the code also. I use a USB power source.

#include <LiquidCrystal.h>
LiquidCrystal lcd(9, 8, 7, 6, 5, 4); // 9 to lcd4 // 8 to lcd 6 // 7 to lcd 11 // 6 to lcd 12 // 5 to lcd13 // 4 to lcd 14 

//E1
#define IRQ_A 5
#define IRQ_B 4
#define FlowA 18
#define FlowB 19
//E2
#define E2IRQ_A 1
#define E2IRQ_B 0
#define E2FlowA 3
#define E2FlowB 2

unsigned long oldTime  = 0;

volatile byte pulseCountIN;
volatile byte pulseCountOUT;

volatile byte pulseCountIN2;
volatile byte pulseCountOUT2;

void setup()
  {
  Serial.begin(57600);
  lcd.begin(20, 4);
  lcd.setCursor(0, 0);
  lcd.print("                    ");
  lcd.setCursor(0, 1);
  lcd.print("                    ");
  lcd.setCursor(0, 2);
  lcd.print("                    ");
  lcd.setCursor(0, 3);
  lcd.print("                    ");
  lcd.clear();
  
  
  lcd.setCursor(0, 0);
  lcd.print("4 PULSE");
  delay(5000);
  lcd.clear();
  
  pulseCountIN   = 0; //E1 IN 
  pulseCountOUT  = 0; //E1 OUT
  pulseCountIN2  = 0; //E2 IN
  pulseCountOUT2 = 0; //E2 OUT
  
  
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  
  digitalWrite(12, HIGH); // POWER E1 Sensor
  digitalWrite(13, HIGH);  // POWER E2 sensor
  
  pinMode(FlowA, INPUT);
  pinMode(FlowB, INPUT);
  
  pinMode(E2FlowA, INPUT);
  pinMode(E2FlowB, INPUT);

  attachInterrupt(IRQ_A, CounterIN, CHANGE);
  attachInterrupt(IRQ_B, CounterOUT, CHANGE);
  attachInterrupt(E2IRQ_A, E2CounterIN, CHANGE);
  attachInterrupt(E2IRQ_B, E2CounterOUT, CHANGE);
  } 


// main code here, to run repeatedly: 
void loop() 
  {
  unsigned long now = millis();
  if((now - oldTime > 1000))
  {
  unsigned long duration = now - oldTime;
  oldTime = now; 
  
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("E1:");
  lcd.setCursor(0,1);
  lcd.print("IN:  ");
  lcd.print(pulseCountIN, DEC); //virtaus meno
  lcd.setCursor(0,2);
  lcd.print("OUT: ");
  lcd.print(pulseCountOUT, DEC); //virtaus lapuu
  lcd.setCursor(10,0);
  lcd.print("E2:");
  lcd.setCursor(10,1);
  lcd.print("IN2:  ");
  lcd.print(pulseCountIN2, DEC);
  lcd.setCursor(10,2);
  lcd.print("OUT2: ");
  lcd.print(pulseCountOUT2, DEC);
  
  Serial.println("      ");
  Serial.println("E1");
  Serial.print("IN:  ");
  Serial.println(pulseCountIN, DEC); //virtaus meno
  Serial.print("OUT: ");
  Serial.println(pulseCountOUT, DEC); //virtaus lapuu
  Serial.println("      ");
  Serial.println("E2");
  Serial.print("IN2:  ");
  Serial.println(pulseCountIN2, DEC);
  Serial.print("OUT2: ");
  Serial.println(pulseCountOUT2, DEC);
  Serial.println("      ");
  
  pulseCountIN = 0;
  pulseCountOUT = 0;
  pulseCountIN2 = 0;
  pulseCountOUT2 = 0;
  }
  }
  
  //E1 IN
void CounterIN()
{
  if (digitalRead(FlowA) == LOW)
  {
  pulseCountIN++;
  }
  if (digitalRead(FlowA) == HIGH)
  {
  }
}
  //É1 OUT
void CounterOUT()
{
  if (digitalRead(FlowB) == LOW)
  {
  pulseCountOUT++;
  }
  if (digitalRead(FlowB) == HIGH)
  {
  pulseCountOUT++;
  }
}  
  //E2 IN
void E2CounterIN()
{
  if (digitalRead(E2FlowA) == LOW)
  {
  pulseCountIN2++;
  }
  if (digitalRead(E2FlowA) == HIGH)
  {
  }
}
  //E2 OUT
void E2CounterOUT()
{  
  if (digitalRead(E2FlowB) == LOW)
  {
  pulseCountOUT2++;
  }
  if (digitalRead(E2FlowB) == HIGH)
  {
  }  
}