Chance value water level

[truxik]

how do i write a code so i can change y

#include "HX711.h"
#include <EEPROM.h>

const int LOADCELL_DOUT_PIN = 23;
const int LOADCELL_SCK_PIN = 22;

#define EEPROM_SIZE 32

float y = 100; // vyska 100 mm
float m;
float reading;
  
HX711 scale;
 
void setup() {
  Serial.begin(115200);
  EEPROM.begin(EEPROM_SIZE);
  
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  reading = scale.read();
  delay(1000);
  m = scale.read();
  
}

void loop() {

  if (scale.wait_ready_timeout(1000)) {
    reading = scale.read();
    Serial.print("HX711 reading: ");
    Serial.println(reading);
    Serial.print("hodnota m=y: ");
    Serial.println(m);
    // float m = xxx; známa hodnota při zname vyšce
    float y1 = (y/m);
    EEPROM.writeFloat (0,y1);
    EEPROM.commit();
    EEPROM.readFloat (0);    
    float y2 = (y1*reading);
    EEPROM.readFloat (1);
    EEPROM.commit();
    EEPROM.writeFloat (1,y2);
    Serial.print("hladina: ");
    Serial.println(y2);
    // primka
    float dy = (y2-y);
    float dx = (reading-m);
    float a = (dy/dx);
    float b = (y-(a*m));
    float p = (a*reading+b);
    EEPROM.writeFloat (3,p);
    EEPROM.commit();
    EEPROM.readFloat (3);
    Serial.print("primka: ");
    Serial.println(p);

  } else {
    Serial.println("HX711 not found.");
  }
  delay(1500);
  
}

[alto777]

@truxik

how do i write a code so i can change y

You could change y where it is currently set to 10-. Change it to whatever you want.

But you probably mean to make it adjustable.

What input device do you want to use to make the adjustment?

a7

[truxik]

write the value to the terminal keyboard

[johnwasser]

void loop()
{
  if (Serial.available())
  {
    y = Serial.parseFloat();
    Serial.print("y set to ");
    Serial.println(y);
  }
.
.
.

WARNING: If you don't set Serial Monitor to "No line ending" you will get y=0.0 after each correct entry.