Sensor level C++ code for Arduino - For Professor Rodrigo Icaro

icaro.ino

/* 
 * Level Sensor C++ Code for Arduino
 * Renato Araújo, 29 mar 2022
 * renatorraraujo@gmail.com
 * github: @renatoexpert
 */

/*
 * NOTE
 * Tinkercad eletronics are not working properly, since
 * theres a bigger numbers of components and lines of code.
 * The slideswitch is always ON by a bug. You may check it
 * "cutting" off its wire.
 */

#include <LiquidCrystal.h>
#include <string.h>

// LCD SIZE
#define LCD_W 16
#define LCD_H 2

// LCD PORTS
#define LCD_RS 0
#define LCD_E 1
#define LCD_DB4 8
#define LCD_DB5 9
#define LCD_DB6 10
#define LCD_DB7 11

// SENSOR PORTS
#define S1 4
#define S2 5
#define S3 6
#define S4 7

// Clock-time in ms
#define CLOCK 2000

LiquidCrystal lcd (LCD_RS, 
	LCD_E, 
	LCD_DB4, 
	LCD_DB5, 
	LCD_DB6, 
	LCD_DB7
);
int level;

void setup () {
	lcd.begin (LCD_W, LCD_H);
  	/*	// 		Debug
    *	// Uncomment the following line to debug,
  	*	// It may cause errors on LCD screen rendering
	*	Serial.begin (9600);
    */
}

// Read sensors and update level status
void set_level () {
	if (digitalRead(S4)) {
    	level = 100;
    } else if (digitalRead(S3)) {
		level = 75;
    } else if (digitalRead(S2)) {
    	level = 50;
    } else if (digitalRead(S1)) {
    	level = 25;
    } else {
    	level = 0;
    }
}

void render_lcd () {
	lcd.clear();
	// Print out "Reservatory" on LCD
	String reservatorio = "Reservatorio";
	lcd.setCursor (centralizar (reservatorio), 0);
	lcd.print (reservatorio);
  	// Print out its level on the downside line
  	auto levelstr = "Nivel: " + String (level) + "%";
	lcd.setCursor (centralizar (levelstr), 1);
	lcd.print (levelstr);
}     

// Calculates the space needed in the left for a term,
// in order to centralize it on LCD
int centralizar (auto termo) {
	int space =  (LCD_W - termo.length())/2;
  	return space;
}

void loop () {
	set_level();
	render_lcd ();
	delay(CLOCK);
}