Hi!
I want to have an automatic water filler in my brewery.
The setup is going to be:
Motorized ball valve connected to the kitchen tap
Water flow sensor (YF-S201) measuring the amount of water from the ball valve.
A relay-board to open, and to close the ball valve when the flow meter has registered the wanted amount of water.
A pump connected to the water line, driven by the same relay output, if needed (which I don’t believe is necessary)
An arduino MEGA.
There is this other guy who has an automatic water filler set up with a small keyboard and an LCD-screen.
My question is if this is possible to achieve with just using Blynk?
I want a slider to select the wanted amount of water, a value display to show the current amount filled and two buttons; one for starting the filling process and one for stopping/resetting (in case of wrong amount input or other errors).
My coding skills are of a beginner’s…
Can someone please atleast point me in the right direction of how to “virtualize” the code?
Do I still have to use all the cases in the loop?
The code with LCD-screen and keyboard looks like this:
/*
water filler
*/
#include <Keypad.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
byte Loe[8] = {B00000,B00001,B01110,B10101,B10101,B01110,B10000,B00000}; // norwegian ø
volatile int waterpulse = 0;
int wanted = 0;
int liter = 0;
int litergam = 1;
byte transfr =0;
int watersensor = 2;
char customKey;
const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','D'},
{'C','0','F','E'}
};
byte rowPins[ROWS] = {4,5,6,7}; //rows to keyboard
byte colPins[COLS] = {8,9,10,11}; //columns for keyboard
//Init class NewKeypad
Keypad customKeypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS);
void rpm () //interrupt function that is called when activity on pin 2.
{
waterpulse++; //counting pulses pin 2.
// add one every time interruption is called. Interruption is called for each increasing pulse on pin 2.
if (waterpulse >= 415) //the sensor is measured at 450 pulses pr. liter. This can be adjusted to calibrate
{liter++;
waterpulse = 0 ;
}
}
void setup()
{
pinMode(watersensor, INPUT); //set digital pin 2 as input.
pinMode(13, OUTPUT); //relay output
attachInterrupt(0,rpm, RISING);
lcd.begin(16,2); // initialize the lcd
lcd.backlight();
lcd.print("Behind Bars"); // Brewery name
lcd.setCursor(0,1);
lcd.print("Brewery");
delay(4000);
lcd.createChar(1, Loe); // definition of norwegian ø
lcd.clear();
lcd.print("Torfinns"); // for commercial matter
lcd.setCursor(0,1);
lcd.print("watermeter");
delay(3000);
lcd.clear();
lcd.print("Antall liter 00");
lcd.setCursor(0,1);
lcd.print("Overf");
lcd.write(1);
lcd.print("rt ");
lcd.setCursor(11,1);
lcd.print(liter);
}
void loop()
{
customKey = customKeypad.getKey();
switch(customKey)
{
case '0' ... '9': // Typing numbers
// lcd.setCursor(0,0);
if (transfr ==0){ //cannot change if transfer has been initiated.
wanted = wanted * 10 + (customKey - '0');
if(wanted>99)
{ wanted=0;}
lcd.clear();
lcd.print("Antall liter");
lcd.setCursor(13,0);
lcd.print(wanted);
}
break;
case 'A': //F1 function button RESET
transfr = 0;
liter = 0;
litergam = 1;
waterpulse =0;
lcd.setCursor(13,0);
lcd.print(" ");
lcd.setCursor(11,1);
lcd.print(" ");
break;
case 'B': //Function button F2 not in use
break;
case 'F': // Stop button, stop transferring
transfr = 0;
break;
case 'E': //Function button F4 not in use
break;
case 'C': // Start button, start transferring the ammount typed in
transfr = 1;
lcd.setCursor(11,1);
lcd.print(" ");
//liter =0;
//waterpulse=0;
break;
}
if (litergam <= liter){ //checking if liter has increased before display is updated
lcd.setCursor(0,1);
lcd.print("Overf");
lcd.write(1); // to get norwegian ø in the display.
lcd.print("rt ");
lcd.setCursor(11,1);
lcd.print(liter);
litergam ++;
}
if (liter >= wanted){
transfr = 0;// stop transfer. ammount achieved.
litergam=1;
liter=0;
}
if (transfr == 1){
digitalWrite(13, LOW);
lcd.setCursor(15,1);
lcd.print("P"); // a P in the display indicates pumping.
} //Open valve.
else {
digitalWrite(13, HIGH); //close valve.
lcd.setCursor(15,1);
lcd.print(" ");
}
}
i will continue to work on it too. right now the code just displays data on lcd widget (data is 0 as there is no sensor yet) it also writes the same flow data to the value display widget (just to give you some ideas on how that works too) the slider just sets a variable in the code, and then writes back to the display widget for debuggin, just so I can see it change. Haven’t started the buttons code yet. but basically will just toggle relay on and off…lots of stuff commented out for now, don’t write to serial output with blynk, it doesn’t really like that.
