Low-power design

examples/Touch_and_unlock/Touch_and_unlock.ino

@@ -16,6 +16,7 @@ void sfmPinInt1() {
 void setup() {
   SFM.setPinInterrupt(sfmPinInt1); // must perform this step in setup() to attach the inner interrupt.
   Serial.begin(115200); // not affiliated with module, just print unlock result.
+  SFM.disable(); // low-power design, power-off device
 }
 
 uint8_t temp = 0; // used to get recognition return
@@ -25,6 +26,8 @@ void loop() {
   if(SFM.isTouched() != lastTouchState) { // Make sure the action just performed once when touch state changes
     lastTouchState = SFM.isTouched();
     if(SFM.isTouched()) {
+      SFM.enable(); // low-power design, power-on device
+      delay(200);
       SFM.setRingColor(SFM_RING_RED, SFM_RING_OFF); // Ring fade from red to black at default period (500ms), creating a breathe effect
       // Here we are going to start recognition, if unlocked, we will change the ring color to green and send a message
       temp = SFM.recognition_1vN(tempUid);
@@ -35,6 +38,8 @@ void loop() {
     }
     else {
       SFM.setRingColor(SFM_RING_OFF);
+      delay(200);
+      SFM.disable(); // low-power design, power-off device
     }
   }
 }