I've written a simple sketch that adds threshold to an PIR sensor. If the PIR sensor sends 3 HIGH ex. HIGH...LOW...HIGH...LOW...HIGH (The LOW == no movement) it will trigger and alarm.
I want to reset the counter of HIGHs if there's no movement detected. The problem is the loop will get delayed if I put it inline. My code: (Don't mind my code, I'm pretty newbie)
int calibrationTime = 30;
int pirPin = 5;
int ledPin = 6;
int sensorState;
int stateCount = 0; //How much movement is detected
int stateThreshold = 3; //THRESHOLD
bool isSensorHigh;
void setup() {
Serial.begin(9600);
pinMode(pirPin, INPUT);
pinMode(ledPin, OUTPUT);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
digitalWrite(pirPin, LOW);
Serial.print("calibrating sensor ");
for (calibrationTime; calibrationTime > 0; calibrationTime--) {
Serial.print(calibrationTime);
delay(1000);
}
Serial.println(" done");
Serial.println("SENSOR ACTIVE");
delay(50);
}
void loop() {
sensorState = digitalRead(pirPin);
//Serial.println(sensorState);
if (sensorState == 1) {
isSensorHigh = true;
}
if (sensorState == 0 && isSensorHigh == true) {
isSensorHigh = false;
stateCount++;
}
//Set pins 2,3,4 here to LOW if there's no movement detected over time
if (stateThreshold == 3) {
switch (stateCount) {
case 1:
digitalWrite(2, HIGH);
break;
case 2:
digitalWrite(3, HIGH);
break;
case 3:
digitalWrite(4, HIGH);
break;
}
}
if (stateCount == stateThreshold) {
blinkLeds();
delay(3000);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
digitalWrite(ledPin, LOW);
stateCount = 0;
}
Serial.println(stateCount);
delay(150);
}
void blinkLeds() {
for (int x = 4; x > 0; x--) {
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
delay(1000);
}
}
