int out = 2;
int buz=11;
int bt=7;
void setup() {
// put your setup code here, to run once:
pinMode(out,INPUT);
pinMode(buz,OUTPUT);
digitalWrite(buz,LOW);
Serial.begin(9600);
pinMode(bt,INPUT);
}
void loop() {
// put your main code here, to run repeatedly:
if(digitalRead(bt)==LOW){
if(digitalRead(out)==HIGH)
{digitalWrite(buz,HIGH);
Serial.println(out);
Serial.println("stop something is ahead");
}else{
digitalWrite(buz,LOW);
Serial.println("path is clear");
} }
else{
digitalWrite(buz,LOW);
}
}