Motion Detector

gistfile1.c

// Uses a PIR sensor to detect movement, light an LED and eventually send a SMS
// based upon: https://raw.github.com/jedgarpark/Make_PIR_Sensor/master/MAKE_PIR_Sensor.pde

#include <string.h>
char server[] = "bstolte.com";
TCPClient client;

int ledPin = D5;                 // choose the pin for the LED
int inputPin = D7;               // choose the input pin (for PIR sensor)
int pirState = LOW;              // we start, assuming no motion detected
int val = 0;                     // variable for reading the pin status

void setup() {
    pinMode(ledPin, OUTPUT);     // set up the LED as an output, it will light up if motion is detected
    pinMode(inputPin, INPUT);    // read the input from the PIR sensor
    Spark.variable("inputPin", &inputPin, INT);  // Register the Spark variable for use with the API
    
    Serial.begin(9600);
    delay(1000);
    Serial.println("connecting...");

}

void loop() {
    val = digitalRead(inputPin);         // read the value from the PIR sensor
    if (val == HIGH) {                   // if the sensor detects motion
            digitalWrite (ledPin, HIGH); // then turn on the LED    
            
            // Call bstolte.com/motion_sms/sendsms to send a text message
            client.connect(server, 80);
            client.println("GET /motion_sms/sendsms/4154256133/hello HTTP/1.0");
            client.println("Connection: close");
            client.print("Host: ");
            client.println(server);
            client.println("Accept: text/html, text/plain");
            client.println();
            client.flush();
            client.stop();
            delay(5000);


        if (pirState == LOW) {                     // we have turned on so let's let the serial monitor know
            Serial.println("Motion detected!");
            pirState = HIGH;                       // set it to high
        }
    }
    
    else {
        digitalWrite (ledPin, LOW);                // turn the LED off
        delay(300);                                // wait again for 300ms 
        if (pirState == HIGH) {                     // we have just turned off
            Serial.println("Motion ended!");
            pirState = LOW;
        }
    }

}