Скачать или смотреть Arduino Tutorial: How to use Line Tracking Sensor with Arduino.

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Arduino Tutorial: How to use Line Tracking Sensor with Arduino UNO.
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CODE
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/*
NOTE: Please replace $ sign with open and close Angle brackets in the code below, because YOUTUBE won't let me include angle brackets in video's Description.
*/


#include $LiquidCrystal_I2C.h$ //In this line Please replace $ sign with open and close Angle brackets

//connections SDA--A4 and SCL--A5
//initialize the liquid crystal library
//the first parameter is the I2C address
//the second parameter is how many rows are on your screen
//the third parameter is how many columns are on your screen

LiquidCrystal_I2C lcd(0x27, 16, 2);


int LeftSensorPin = 8;
int MiddleSensorPin = 9;
int RightSensorPin = 10;
int ledPin = LED_BUILTIN;

void setup() {

lcd.init(); //initialize lcd screen
lcd.backlight(); // turn on the backlight
pinMode(ledPin, OUTPUT);
pinMode(LeftSensorPin, INPUT);
pinMode(MiddleSensorPin, INPUT);
pinMode(RightSensorPin, INPUT);
}

void loop() {
delay(400);
lcd.clear();
lcd.setCursor(0, 0); //write on the top row
lcd.print("Checking....");


if (digitalRead(LeftSensorPin) == LOW && digitalRead(MiddleSensorPin) == LOW && digitalRead(RightSensorPin) == LOW) {
digitalWrite(ledPin, LOW);


} else if (digitalRead(LeftSensorPin) == HIGH) {
digitalWrite(ledPin, HIGH);
lcd.setCursor(0, 1); //write on the bottom row
lcd.print("Line on Left");
} else if (digitalRead(MiddleSensorPin) == HIGH) {
digitalWrite(ledPin, HIGH);
lcd.setCursor(0, 1); //write on the bottom row
lcd.print("Line on Middle");
} else if (digitalRead(RightSensorPin) == HIGH) {
digitalWrite(ledPin, HIGH);
lcd.setCursor(0, 1); //write on the bottom row
lcd.print("Line on Right");
}
}

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