Added LowPower

lowpower.ino

@@ -0,0 +1,50 @@
+#include "LowPower.h"
+
+int ledPin = 15;
+int sleepcycles = 12;  // every sleepcycle will last 8 secs, total sleeptime will be sleepcycles * 8 sec
+bool joined = false;
+bool sleeping = false;
+
+void setup()
+{
+  // No setup is required for this library
+    pinMode(ledPin, OUTPUT);
+}
+
+void loop() 
+{
+  // Enter idle state for 8 s with the rest of peripherals turned off
+  // Each microcontroller comes with different number of peripherals
+  // Comment off line of code where necessary
+
+  // ATmega328P, ATmega168
+    LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF); 
+
+  // ATmega32U4
+  //LowPower.idle(SLEEP_8S, ADC_OFF, TIMER4_OFF, TIMER3_OFF, TIMER1_OFF, 
+  //		  TIMER0_OFF, SPI_OFF, USART1_OFF, TWI_OFF, USB_OFF);
+
+  // ATmega2560
+  //LowPower.idle(SLEEP_8S, ADC_OFF, TIMER5_OFF, TIMER4_OFF, TIMER3_OFF, 
+  //		  TIMER2_OFF, TIMER1_OFF, TIMER0_OFF, SPI_OFF, USART3_OFF, 
+  //		  USART2_OFF, USART1_OFF, USART0_OFF, TWI_OFF);
+
+  // ATmega256RFR2
+  //LowPower.idle(SLEEP_8S, ADC_OFF, TIMER5_OFF, TIMER4_OFF, TIMER3_OFF, 
+  //      TIMER2_OFF, TIMER1_OFF, TIMER0_OFF, SPI_OFF,
+  //      USART1_OFF, USART0_OFF, TWI_OFF);
+
+  // Do something here
+  // Example: Read sensor, data logging, data transmission.
+  digitalWrite(ledPin, HIGH);
+  delay(5000);
+  digitalWrite(ledPin, LOW);
+  delay(1000);
+
+        sleeping = false;
+      for (int i=0;i<sleepcycles;i++)
+      {
+          LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);    //sleep 8 seconds
+      }
+}
+