Start of example conversion. Added sleep to MySensors API.

libraries/LowPower/Examples/powerDownWakePeriodic/powerDownWakePeriodic.ino

@@ -0,0 +1,16 @@
+// **** INCLUDES *****
+#include "LowPower.h"
+
+void setup()
+{
+    // No setup is required for this library
+}
+
+void loop() 
+{
+    // Enter power down state for 8 s with ADC and BOD module disabled
+    LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);  
+    
+    // Do something here
+    // Example: Read sensor, data logging, data transmission.
+}