#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int ledPin = 13;
int pirPin = 10;
int pirState = LOW; // we start, assuming no motion detected
int val = 0; // variable for reading the pin status
int counter = 0;
int currentState = 0;
int previousState = 0;

void setup() {
pinMode(ledPin, OUTPUT); // declare LED as output
pinMode(pirPin, INPUT); // declare sensor as input
lcd.begin(16, 2);
lcd.setCursor(4, 0);
lcd.print("counter");
}
void loop(){
val = digitalRead(pirPin); // read PIR sensor input value
if (val == HIGH) { // check if the input is HIGH
digitalWrite(ledPin, HIGH); // turn LED ON
if (pirState == LOW) {
// we have just turned on
currentState = 1;
// We only want to print on the output change, not state
pirState = HIGH;
delay(1000);
}
} else {
digitalWrite(ledPin, LOW); // turn LED OFF
if (pirState == HIGH){
// we have just turned of
currentState = 0;
// We only want to print on the output change, not state
pirState = LOW;
}
}
if(currentState != previousState){
if(currentState == 1){
counter = counter + 1;
lcd.setCursor(4,1);
lcd.print(counter);
delay(200);
}
}
}
ผมลองเขียนโค้ตตัวนี้ให้เป็นตัวนับจำนวนเซ็นเซอร์นะครับแทนที่จะนำเวลาผ่าน rip senser แต่มันดันนับไม่หยุดนับไปเรื่อยๆเลย ส่วนตัว rip ก็ไมทำงานเพระาอะไรหรอครับ