PIR Notify LED (#702)

* Add PIR LED mirroring

* Lint formating

* Changed var name & added example define

Co-authored-by: Jonathan Michael Wells <jonathan-wells@oist.jp>

main/ZsensorHCSR501.ino

@@ -33,6 +33,10 @@
 void setupHCSR501() {
   Log.notice(F("HCSR501 pin: %d" CR), HCSR501_GPIO);
   pinMode(HCSR501_GPIO, INPUT); // declare HC SR-501 GPIO as input
+#  ifdef HCSR501_LED_NOTIFY_GPIO
+  pinMode(HCSR501_LED_NOTIFY_GPIO, OUTPUT);
+  digitalWrite(HCSR501_LED_NOTIFY_GPIO, LOW);
+#  endif
 }
 
 void MeasureHCSR501() {
@@ -58,6 +62,9 @@ void MeasureHCSR501() {
         pirState = LOW;
       }
     }
+#  ifdef HCSR501_LED_NOTIFY_GPIO
+    digitalWrite(HCSR501_LED_NOTIFY_GPIO, pirState);
+#  endif
     if (HCSR501data.size() > 0)
       pub(subjectHCSR501toMQTT, HCSR501data);
   }

main/config_HCSR501.h

@@ -31,6 +31,7 @@ extern void HCSR501toMQTT();
 /*----------------------------USER PARAMETERS-----------------------------*/
 /*-------------DEFINE YOUR MQTT PARAMETERS BELOW----------------*/
 #define subjectHCSR501toMQTT "/HCSR501toMQTT"
+//#define HCSR501_LED_NOTIFY_GPIO 4 //Uncomment this line to mirror the state of the PIR sensor to the specified GPIO
 
 #ifndef TimeBeforeStartHCSR501
 #  define TimeBeforeStartHCSR501 60000 //define the time necessary for HC SR501 init