#include <LiquidCrystal_I2C.h>
#define VR 36
#define LED 13
LiquidCrystal_I2C lcd(0x27,16,2);
void setup() {
pinMode (LED,OUTPUT);
Serial.begin(9600);
lcd.init();
lcd.backlight();
//แสงหนาจอ LCD สวางขึ้น
lcd.print("welcome");
//หนาจอ LCD แสดงผลวายังไง
}
int VP,C_VP;
void loop() {
VP = analogRead(VR);
Serial.println(VP);
if(VP != C_VP) {
lcd.clear();
lcd.print(VP);
}
C_VP = VP;
if (VP>2047)
digitalWrite(LED, LOW);
else digitalWrite(LED, HIGH);
}