Added constructor to sleep() for monitoring two interrupts

The new constructor allows two separate interrupts with two
separate trigger policies to wake up device.

Author: fallberg

libraries/MySensors/MySensor.cpp

@@ -470,6 +470,10 @@ void wakeUp()	 //place to send the interrupts
 {
 	pinIntTrigger = 1;
 }
+void wakeUp2()	 //place to send the second interrupts
+{
+	pinIntTrigger = 2;
+}
 
 void MySensor::internalSleep(unsigned long ms) {
 	while (!pinIntTrigger && ms >= 8000) { LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF); ms -= 8000; }
@@ -512,7 +516,32 @@ bool MySensor::sleep(uint8_t interrupt, uint8_t mode, unsigned long ms) {
 	return pinTriggeredWakeup;
 }
 
+int8_t MySensor::sleep(uint8_t interrupt1, uint8_t mode1, uint8_t interrupt2, uint8_t mode2, unsigned long ms) {
+	int8_t retVal = 1;
+	Serial.flush(); // Let serial prints finish (debug, log etc)
+	RF24::powerDown();
+	attachInterrupt(interrupt1, wakeUp, mode1);
+	attachInterrupt(interrupt2, wakeUp2, mode2);
+	if (ms>0) {
+		pinIntTrigger = 0;
+		sleep(ms);
+		if (0 == pinIntTrigger) {
+			retVal = -1;
+		}
+	} else {
+		Serial.flush();
+		LowPower.powerDown(SLEEP_FOREVER, ADC_OFF, BOD_OFF);
+	}
+	detachInterrupt(interrupt1);
+	detachInterrupt(interrupt2);
 
+	if (1 == pinIntTrigger) {
+		retVal = (int8_t)interrupt1;
+	} else if (2 == pinIntTrigger) {
+		retVal = (int8_t)interrupt2;
+	}
+	return retVal;
+}
 
 #ifdef DEBUG
 void MySensor::debugPrint(const char *fmt, ... ) {

libraries/MySensors/MySensor.h

@@ -221,6 +221,19 @@ class MySensor : public RF24
 	 */
 	bool sleep(uint8_t interrupt, uint8_t mode, unsigned long ms=0);
 
+	/**
+	 * Sleep (PowerDownMode) the Arduino and radio. Wake up on timer or pin change for two separate interrupts.
+	 * See: http://arduino.cc/en/Reference/attachInterrupt for details on modes and which pin
+	 * is assigned to what interrupt. On Nano/Pro Mini: 0=Pin2, 1=Pin3
+	 * @param interrupt1 First interrupt that should trigger the wakeup
+	 * @param mode1 Mode for first interrupt (RISING, FALLING, CHANGE)
+	 * @param interrupt2 Second interrupt that should trigger the wakeup
+	 * @param mode2 Mode for second interrupt (RISING, FALLING, CHANGE)
+	 * @param ms Number of milliseconds to sleep or 0 to sleep forever
+	 * @return Interrupt number wake up was triggered by pin change and negative if timer woke it up.
+	 */
+	int8_t sleep(uint8_t interrupt1, uint8_t mode1, uint8_t interrupt2, uint8_t mode2, unsigned long ms=0);
+
 	/**
 	 * getInternalTemp
 	 *