Hey i try use a HC-SR04 distance sensor to counter, in my program i need count peoples in 40cm distance, my distance sensor works well but i can't count the persons what i make wrong ?
Here is my cod:
const int trigPin = 11;
const int echoPin = 10;
long duration;
int distance;
void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(9600);
}
int Distance(int distance, long duration){
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = duration*0.034/2;
/Serial.print("Distancia: ");
Serial.print(distance);
Serial.println(" cm");/
}
int counter;
void loop() {
int distancia = Distance(distance, duration);
if(digitalRead(distancia)<10)//checa o input
{
while(digitalRead(distancia)<10)//espera o input para o fim
{};
counter+=1; //incremento para contar as pessoas
Serial.println(counter);
delay(50);
}
}