here you go
//screen and keyboard code starts
#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#include<stdio.h>
const int ROW_NUM = 4;
const int COLUMN_NUM = 3;
char keys[ROW_NUM][COLUMN_NUM] = {
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'},
{'*', '0', '#'}
};
byte pin_rows[ROW_NUM] = {9,8,7,6};
byte pin_column[COLUMN_NUM] = {5,4,3};
Keypad keypad = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );
char volume[4];
byte volumeCount = 0;
bool edit = 0;
int finalValue = 0;
//screen and keyboard code ends
//flow sensor and other machinery code starts
int flowsensor = 2; // Sensor Input
int sensorInterrupt = 0;
unsigned int SetPoint = 400;
String code = "";
float calibrationFactor = 10;
volatile byte pulseCount = 0;
float flowRate = 0.0;
unsigned int flowMilliLitres = 0;
unsigned long totalMilliLitres = 0, VolumeSet = 0;
unsigned long oldTime;
int SolenoidPumpPin=11; //was 11 with original design
// constants won't change. They're used here to set pin numbers:
const int buttonPin1 = 12; // the number of the pushbutton pin for start flow
// variables will change:
int buttonState1 = 0; // variable for reading the pushbutton status
void pulseCounter() {
pulseCount++;
}
//flow sensor and other machinery code ends
void setup()
{
// screen code starts
lcd.init();
lcd.clear();
lcd.backlight();
lcd.setCursor(0, 0);
lcd.print("Volume ml");
lcd.setCursor(0, 1);
lcd.print("Filled ml");
// screen code ends
//sensor code starts
pinMode(SolenoidPumpPin, OUTPUT);
digitalWrite(SolenoidPumpPin, LOW); //Switch Solenoid ON
totalMilliLitres = 0;
pinMode(flowsensor, INPUT);
digitalWrite(flowsensor, HIGH);
attachInterrupt(sensorInterrupt, pulseCounter, FALLING); // Setup Interrupt
//sensor code ends
}
void loop()
{
buttonState1 = digitalRead(buttonPin1);
char key = keypad.getKey();
if(key) // check if any key was pressed
{
if(key == '*') // if * was pressed switch to edit mode
{
lcd.setCursor(0,0); // set your cursor at columnt 0, row 0
lcd.clear();//new
lcd.print("Enter volume: ");
edit = true;
lcd.setCursor(0,1); // set your cursor to second row
volumeCount = 0;
volume[0] = '0';
volume[1] = '0';
volume[2] = '0';
volume[3] = '0';
}
if(edit && volumeCount < 4 && key != '*' && key != '#') // enter edit mode
{
volume[volumeCount] = key; // save key to a char array
lcd.setCursor(volumeCount,1); // set your cursor to the next position
lcd.print(volume[volumeCount]); // print the pressed button to lcd
volumeCount++; // increment the array index (cursor position)
}
if(volumeCount == 4 || key == '#') // array.length == 3 OR you pressed #
{
if (key == '#' && volumeCount != 4)
{
volume[volumeCount] = '\0';
edit = false; // disable edit mode
volumeCount = 0; // reset your counter
//lcd.setCursor(0,0);
lcd.clear();//new
lcd.setCursor(0, 0);
lcd.print("Volume ml");
lcd.setCursor(0, 1);
lcd.print("Filled ml");
lcd.setCursor(10, 0);
lcd.print(volume); //new
finalValue = atoi(volume); // save your entered value for further usage
//volume[0] = '0';
//volume[1] = '0';
//volume[2] = '0';
}
else
{
edit = false; // disable edit mode
volumeCount = 0; // reset your counter
//lcd.setCursor(0,0);
lcd.clear();//new
lcd.setCursor(0,0);
lcd.clear();//new
lcd.setCursor(0, 0);
lcd.print("Volume ml");
lcd.setCursor(0, 1);
lcd.print("Filled ml");
lcd.setCursor(10, 0);
lcd.print(volume); //new
finalValue = atoi(volume); // save your entered value for further usage
//volume[0] = '0';
//volume[1] = '0';
//volume[2] = '0';
}
}
}
//sensor and other machine code starts
buttonState1 = digitalRead(buttonPin1);
if (buttonState1 == HIGH)
{
lcd.clear();//new
lcd.setCursor(0,0);
lcd.clear();//new
lcd.setCursor(0, 0);
lcd.print("Volume ml");
lcd.setCursor(0, 1);
lcd.print("Filled ml");
lcd.setCursor(10, 0);
lcd.print(volume);
//delay(100);//needed with 12v adaptor
//pulse_freq = 0;
//flow = 1.4 * pulse_freq;
//VolumeSet = finalValue;
while(totalMilliLitres < finalValue)
{
digitalWrite(SolenoidPumpPin, HIGH);
if ((millis() - oldTime) > 1000)
{
detachInterrupt(sensorInterrupt);
flowRate = ((1000.0 / (millis() - oldTime)) * pulseCount) / calibrationFactor;
oldTime = millis();
flowMilliLitres = (flowRate / 60) * 1000;
totalMilliLitres += flowMilliLitres;
unsigned int frac;
lcd.setCursor(10, 1);
lcd.print(totalMilliLitres);
pulseCount = 0;
}
attachInterrupt(sensorInterrupt, pulseCounter, FALLING);
}
digitalWrite(SolenoidPumpPin, LOW);
//VolumeSet = 0;
totalMilliLitres = 0;
/*else
{
digitalWrite(SolenoidPumpPin, HIGH);
VolumeSet = 0;
}*/
}
/*while(flow<=(finalValue))//+1 to match the figures and be on the safe side
{
digitalWrite(SolenoidPumpPin, LOW);
lcd.setCursor(10, 1);
int finalflow = flow; //just so we can print it in int format without decimal
lcd.print(finalflow);
flow = 1.4 * pulse_freq;
}
digitalWrite(SolenoidPumpPin, HIGH);
lcd.setCursor(10, 1);
//int finalflow = flow; //required only if we are printing finalflow in next line
lcd.print(volume); //for hack sake and visuals sake we will print volume here instead of final flow
}*/
//sensor and other machinery code ends
}
