Arduino Uno Quick Start Manual page 211

The PIR sensor has three pins: power, ground, and signal. Connect power to
the Arduino s 5V supply, ground to one of the Arduino s GND pins, and signal
to digital pin 2. In the following figure, you see a circuit diagram that connects
a PIR sensor from Adafruit
vendors often differ in the order of their connectors. The PIR sensor in
29, Top and bottom of a passive infrared sensor,
always make sure you connect the correct pins.
The PIR sensor usually also has a jumper that you can use for changing its
behavior. For our project, it has to be in position H; the jumper has to cover
the pin next to the H. (Lady Ada has an excellent tutorial on PIR sensors.)
Then enter the following code in the Arduino IDE:
Ethernet/MotionDetector/MotionDetector.ino
const unsigned int
Line 1
const unsigned int
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class PassiveInfraredSensor {
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int _input_pin;
5
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public:
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PassiveInfraredSensor(const int
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_input_pin = input_pin;
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pinMode(_input_pin, INPUT);
10
}
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const bool motion_detected()
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return digitalRead(_input_pin) == HIGH;
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}
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};
15
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PassiveInfraredSensor pir(PIR_INPUT_PIN);
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void setup() {
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Serial.begin(BAUD_RATE);
20
}
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7. http://www.adafruit.com/products/189
8. https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor
Detecting Motion Using a Passive Infrared Sensor
7
to an Arduino. Note that PIR sensors from different
PIR_INPUT_PIN = 2;
BAUD_RATE = 9600;
input_pin) {
const {
www.it-ebooks.info
Figure
is different, so you should
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8
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