i used this code
int ir_pin = 2;
int counter = 0;
int detected = false;
void setup() {
Serial.begin(9600);
pinMode(ir_pin,INPUT);
}
void loop() {
int val = digitalRead(ir_pin);
if( (val == 0) && (detected = false ) ){
counter++;
detected = true;
Serial.print("count =");
Serial.println(counter);
}
else if( (val == 1) && (detected = true ) ){
detected = false;
}
}
and does not display anything. but when the first time I upload it, it works fine, but when the 2nd time I upload it( I unplugged the arduino to take a break) serial monitor do not display anything.
but when i try this code:
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
}
void loop() {
// put your main code here, to run repeatedly:
Serial.print("helloo");
}
it works fine, what seems to be the problem? please help me