How to reset total volume with button?

Using Arduino Project Guidance
1

Hi ..
I'm having a bit of trouble, how to reset the total volume with a button from the code below?
can someone tell me ?

[image]


#include <SPI.h>
#include <Wire.h>

#define SENSOR 5


long TimeNowOut = 0;
long previousMillis = 0;
int interval = 1000;

float calibrationFactor = 6.6;
volatile byte pulseCount;
byte pulse1Sec = 0;
float flowRate;
unsigned long flowMilliLitres;
unsigned int totalMilliLitres;
float flowLitres;
float totalLitres;

void IRAM_ATTR pulseCounter()
{
  pulseCount++;
}


void setup()
{
  Serial.begin(115200);
 
  digitalWrite(13, 0);

  delay(10);
 
  pinMode(SENSOR, INPUT_PULLUP);

  pulseCount = 0;
  flowRate = 0.0;
  flowMilliLitres = 0;
  totalMilliLitres = 0;
  previousMillis = 0;

  attachInterrupt(digitalPinToInterrupt(SENSOR), pulseCounter, FALLING);
}

void loop()
{

  static byte PulseState = LOW, ResetPulseState = LOW;
  TimeNowOut = millis();

  if (TimeNowOut - previousMillis > interval)
  {

    pulse1Sec = pulseCount;
    pulseCount = 0;

    flowRate = ((1000.0 / (millis() - previousMillis)) * pulse1Sec) / calibrationFactor;
    previousMillis = millis();

    flowMilliLitres = (flowRate / 60) * 1000;
    flowLitres = (flowRate / 60);

    totalMilliLitres += flowMilliLitres;
    totalLitres += flowLitres;



    // Print the flow rate for this second in litres / minute
    Serial.print("Flow rate: ");
    Serial.print(float(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.print(" mL / ");
    Serial.print(totalLitres);
    Serial.println(" L");


  }
  
}```
2

This code in setup() is pointless - they're all already zero

Which pin is your switch attached to?

3

i can add later, let's say
...
const int buttonPin = 2;

4

or can you help me change the code by measuring the total water rate and total volume and then resetting it with a button,

5

Hello fachromiez
Here comes a pseudo code to be adapted to your needs.

if (buttonBecomesPresses) volume=0;

Have a nice day and enjoy coding in C++.

6

I have tried your code but it doesn't work

7

It wasn't meant to "work"; as stated, it was pseudo code.

Take a look at the State Change Detection example in the IDE to see how buttonBecomesPressed could be implemented.

8

Hello
Do you know the meaning of pseudo code and adaptions?

9

do you mean like this?

  totalMilliLitres += flowMilliLitres;
  totalLitres += flowLitres;



    // Print the flow rate for this second in litres / minute
    Serial.print("Flow rate: ");
    Serial.print(float(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.print(" mL / ");
    Serial.print(totalLitres);
    Serial.println(" L");

    if (buttonState == HIGH) {
      // set totalLitres
      totalLitres = 0;```
10

No, because you'll be using INPUT_PULLUP, so the switch input will normally be HIGH.

You'll be looking for the switch going from HIGH to LOW .

11

Sorry please don't ask me more, if you give me a revision of my code I will try to understand. I'm just trying to learn to understand this arduino. can you give me a solution from my code so i can reset the volume of running water stream with a button ?

12

Hello fachromiez
Run some IDE examples to get familar with coding and organiztion of Arduino sketches.
Have a nice day and enjoy coding in C++.

13

Did you wire the button between pin 2 and Vcc or pin 2 and GND?

14

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