From 18082ba49d6bc11e2812f2d0611b27558c49ec78 Mon Sep 17 00:00:00 2001
From: LowPowerLab <felix@lowpowerlab.com>
Date: Mon, 21 Mar 2016 21:29:51 -0400
Subject: [PATCH] Add DeepSleep sketch

---
 Examples/DeepSleep/DeepSleep.ino | 90 ++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 Examples/DeepSleep/DeepSleep.ino

diff --git a/Examples/DeepSleep/DeepSleep.ino b/Examples/DeepSleep/DeepSleep.ino
new file mode 100644
index 0000000..46be191
--- /dev/null
+++ b/Examples/DeepSleep/DeepSleep.ino
@@ -0,0 +1,90 @@
+//***********************************************************************************************************
+// Sample sketch that achieves the lowest power on a Moteino of ~6.5uA
+// Everything is put to sleep including the MCU, the radio (if any) and the FlashMem chip
+//**** SETTINGS *********************************************************************************************
+#define WITH_RFM69              //comment this line out if you don't have a RFM69 on your Moteino
+#define WITH_SPIFLASH           //comment this line out if you don't have the FLASH-MEM chip on your Moteino
+//***********************************************************************************************************
+
+#include <Arduino.h>            // assumes Arduino IDE v1.0 or greater
+#include <avr/sleep.h>
+#include <avr/wdt.h>
+#include <avr/power.h>
+
+#ifdef __AVR_ATmega1284P__
+  #define LED           15 // Moteino MEGAs have LEDs on D15
+  #define FLASH_SS      23 // and FLASH SS on D23
+#else
+  #define LED           9 // Moteinos have LEDs on D9
+  #define FLASH_SS      8 // and FLASH SS on D8
+#endif
+
+#if defined(WITH_RFM69) || defined(WITH_SPIFLASH)
+  #include <SPI.h>                //comes with Arduino IDE (www.arduino.cc)
+  #if defined(WITH_RFM69)
+    #include <RFM69.h>            //get it here: https://www.github.com/lowpowerlab/rfm69
+    RFM69 radio;
+    #define NETWORKID 100
+    #define NODEID 123
+    #define FREQUENCY RF69_915MHZ
+  #endif
+  #if defined(WITH_SPIFLASH)
+    #include <SPIFlash.h>         //get it here: https://www.github.com/lowpowerlab/spiflash
+    SPIFlash flash(FLASH_SS, 0xEF30); //EF30 for 4mbit  Windbond chip (W25X40CL)
+  #endif
+#endif
+
+//watchdog interrupt
+ISR (WDT_vect) {
+  wdt_disable();
+}
+
+void setup () {
+  for (uint8_t i=0; i<=A5; i++)
+  {
+    pinMode(i, OUTPUT);
+    digitalWrite(i, LOW);
+  }
+
+#if defined(WITH_RFM69)
+  radio.initialize(FREQUENCY,NODEID,NETWORKID);
+  radio.sleep();
+#endif
+
+#if defined(WITH_SPIFLASH)
+  if (flash.initialize())
+    flash.sleep();
+#endif
+
+  power_timer1_disable();
+  power_timer2_disable();
+  power_twi_disable();
+}
+
+void loop () 
+{
+  // disable ADC
+  ADCSRA = 0;  
+  // clear various "reset" flags
+  MCUSR = 0;
+  // allow changes, disable reset
+  WDTCSR = bit (WDCE) | bit (WDE);
+  //set interrupt mode and an interval
+  WDTCSR = bit (WDIE) | bit (WDP3) | bit (WDP0); //set WDIE, and 8 seconds delay
+  wdt_reset(); //pat the dog...
+  
+  set_sleep_mode (SLEEP_MODE_PWR_DOWN);
+  noInterrupts(); // timed sequence follows  
+  sleep_enable();
+
+  // turn off brown-out enable in software
+  // BODS must be set to one and BODSE must be set to zero within four clock cycles
+  MCUCR = bit (BODS) | bit (BODSE);
+  // The BODS bit is automatically cleared after three clock cycles
+  MCUCR = bit (BODS); 
+  interrupts();
+  sleep_cpu();
+
+  //cancel sleep as a precaution
+  sleep_disable();
+}
\ No newline at end of file