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#include <LiquidCrystal_I2C.h> #include <Wire.h> #include <Arduino.h> #define trig 9 #define echo 10 LiquidCrystal_I2C lcd(0X27,16,2); void setup() { Serial.begin(9600); pinMode(trig,OUTPUT); pinMode(echo,INPUT); lcd.init(); lcd.backlight(); } void loop() { unsinged long duration; int distance; digitalWrite(trig,LOW); delayMicroseconds(2); digitalWrite(trig,HIGH); delayMicroseconds(10); digitalWrite(trig,LOW); duration = pulseIn(echo,HIGH); distance = int(duration/2/29.412); lcd.setCursor(0,0); lcd.print("distance = "); lcd.setCursor(0,1); lcd.print(distance); delay (100); }
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