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diff --git a/‎variants/ET-Board/pins_arduino.h
Copy file name to clipboardExpand all lines: variants/ET-Board/pins_arduino.h
+6Lines changed: 6 additions & 0 deletions b/‎variants/ET-Board/pins_arduino.h
Copy file name to clipboardExpand all lines: variants/ET-Board/pins_arduino.h
+6Lines changed: 6 additions & 0 deletions
@@ -11,6 +11,12 @@
 #define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
 #define digitalPinHasPWM(p)         (p < 34)
 
+static const uint8_t LED_BUILTIN = 5;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+#define LED_BUILTIN LED_BUILTIN
+
+
+
 static const uint8_t TX = 34;
 static const uint8_t RX = 35;