Add motion sensor example

Examples/MotionMote/MotionMote.ino

@@ -0,0 +1,70 @@
+// Sample RFM69 sender/node sketch for motion sensor
+// PIR motion sensor connected to D3 (INT1)
+// When RISE happens on D3, the sketch transmits a "MOTION" msg to receiver Moteino and goes back to sleep
+// In sleep mode, Moteino + PIR motion sensor use about ~78uA
+// Library and code by Felix Rusu - felix@lowpowerlab.com
+// Get the RFM69 and SPIFlash library at: https://github.com/LowPowerLab/
+
+#include <RFM69.h>
+#include <SPI.h>
+#include <LowPower.h> //get library from: https://github.com/rocketscream/Low-Power
+                      //writeup here: http://www.rocketscream.com/blog/2011/07/04/lightweight-low-power-arduino-library/
+
+#define NODEID        18    //unique for each node on same network
+#define NETWORKID     100  //the same on all nodes that talk to each other
+#define GATEWAYID     1
+//Match frequency to the hardware version of the radio on your Moteino (uncomment one):
+//#define FREQUENCY     RF69_433MHZ
+//#define FREQUENCY     RF69_868MHZ
+#define FREQUENCY     RF69_915MHZ
+#define ENCRYPTKEY    "sampleEncryptKey" //exactly the same 16 characters/bytes on all nodes!
+//#define IS_RFM69HW    //uncomment only for RFM69HW! Leave out if you have RFM69W!
+#define ACK_TIME      30 // max # of ms to wait for an ack
+#define LED           9  // Moteinos have LEDs on D9
+#define SERIAL_BAUD   115200
+#define MOTIONPIN     1 //hardware interrupt 1 (D3)
+
+int TRANSMITPERIOD = 300; //transmit a packet to gateway so often (in ms)
+RFM69 radio;
+volatile boolean motionDetected=false;
+
+void setup() {
+  Serial.begin(SERIAL_BAUD);
+  radio.initialize(FREQUENCY,NODEID,NETWORKID);
+#ifdef IS_RFM69HW
+  radio.setHighPower(); //uncomment only for RFM69HW!
+#endif
+  radio.encrypt(ENCRYPTKEY);
+  attachInterrupt(MOTIONPIN, motionIRQ, RISING);
+  char buff[50];
+  sprintf(buff, "\nTransmitting at %d Mhz...", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915);
+  Serial.println(buff);
+}
+
+void motionIRQ()
+{
+  motionDetected=true;
+}
+
+void loop() {
+  if (motionDetected)
+  {
+    if (radio.sendWithRetry(GATEWAYID, "MOTION", 6))
+    {
+     Serial.println(" ok!");
+     Blink(LED,3);
+    }
+    else Serial.println(" nothing...");
+    motionDetected=false;
+  }
+  radio.sleep();
+  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
+}
+
+void Blink(byte PIN, int DELAY_MS)
+{
+  pinMode(PIN, OUTPUT);
+  digitalWrite(PIN,HIGH);
+  delay(DELAY_MS);
+  digitalWrite(PIN,LOW);
+}