Enable to switch HM1X led by a macro

#357
if //#define HM_BLUE_LED_STOP true uncommented
the HM1X led is off

ZgatewayBT.ino

@@ -197,6 +197,10 @@ Thanks to wolass https://github.com/wolass for suggesting me HM 10 and dinosd ht
       delay(100);
       softserial.print(F("AT+RESET"));
       delay(100);
+      #ifdef HM_BLUE_LED_STOP
+        softserial.print(F("AT+PIO11")); // When not connected (as in BLE mode) the LED is off. When connected the LED is solid on.
+      #endif
+      delay(100);
       trc(F("ZgatewayBT HM1X setup done "));
     }
     

config_BT.h

@@ -29,7 +29,7 @@
 #define Scan_duration 10 //define the time for a scan
 #define HM-10 
 //#define HM-11 // uncomment this line if you use HM-11 and comment the line above
-#define ZgatewayBT_v6xx // comment if you don't have a firmware version of HM10/11 >= v601
+//#define HM_BLUE_LED_STOP true //uncomment to stop the blue led light of HM1X
 #define delimiter "4f4b2b444953413a"
 #define delimiter_length 16
 #define pubBLEServiceData true // comment if you don't want to publish service data (in case you are having too heavy service data) https://github.com/1technophile/OpenMQTTGateway/issues/318#issuecomment-446064707