/*
 * Name: lf_7_2.ino
 * Date: 2023/01/11
 * Author: heimvon2
 * Version 1.0
 * Wokwi-Simulation Arduino-Modul
 *
 * https://wokwi.com/projects/353549335887311873
 */

#include <LiquidCrystal.h>

#define PIN_TRIG 3
#define PIN_ECHO 2
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

byte warning_icon[8] = {B00100, B00100, B01110, B01010, B11011, B11111, B11011, B11111};

void setup() {
    Serial.begin(115200);
    pinMode(PIN_TRIG, OUTPUT);
    pinMode(PIN_ECHO, INPUT);

    lcd.begin(16, 2);
    lcd.setCursor(0, 0);
    lcd.print("Fuellstand");
    lcd.createChar(0, warning_icon);
}

void loop() {
    // Start a new measurement:
    digitalWrite(PIN_TRIG, HIGH);
    delayMicroseconds(10);
    digitalWrite(PIN_TRIG, LOW);

    // Read the result:
    int duration = pulseIn(PIN_ECHO, HIGH);


    if ((duration / 58.475 / 4) < 25) {
        lcd.setCursor(12, 0);
        lcd.print("Acht");
        lcd.setCursor(12, 1);
        lcd.print("ung");
        lcd.write(byte(0));
    } else {
        lcd.setCursor(12, 0);
        lcd.print("    ");
        lcd.setCursor(12, 1);
        lcd.print("    ");
    }

    lcd.setCursor(0, 1);
    lcd.print(duration / 58.475 + String(" cm   "));

    delay(1000);

    lcd.setCursor(0, 1);
    lcd.print(duration / 58.475 / 4 + String(" %    "));

    delay(1000);

    lcd.setCursor(0, 1);
    lcd.print(duration / 58.475 * 500 + String(" l  "));

    delay(1000);
}