diff --git a/variants/esp320/pins_arduino.h b/variants/esp320/pins_arduino.h
index 388391884..f69cc98b0 100644
--- a/variants/esp320/pins_arduino.h
+++ b/variants/esp320/pins_arduino.h
@@ -9,6 +9,12 @@
 #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
+
+static const uint8_t TX = 1;
+static const uint8_t RX = 3;
+
 static const uint8_t SDA = 2;
 static const uint8_t SCL = 14;
 
diff --git a/variants/esp32thing/pins_arduino.h b/variants/esp32thing/pins_arduino.h
index 6485bc097..3da4bf2ba 100644
--- a/variants/esp32thing/pins_arduino.h
+++ b/variants/esp32thing/pins_arduino.h
@@ -9,6 +9,11 @@
 #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
+
+static const uint8_t KEY_BUILTIN = 0;
+
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;
 
diff --git a/variants/espea32/pins_arduino.h b/variants/espea32/pins_arduino.h
index c87e1a23c..8ce2507d6 100644
--- a/variants/espea32/pins_arduino.h
+++ b/variants/espea32/pins_arduino.h
@@ -9,7 +9,10 @@
 #define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
 #define digitalPinHasPWM(p)         (p < 34)
 
-#define LED_BUILTIN             5
+static const uint8_t LED_BUILTIN = 5;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+
+static const uint8_t KEY_BUILTIN = 0;
 
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;
diff --git a/variants/hornbill32dev/pins_arduino.h b/variants/hornbill32dev/pins_arduino.h
index a76095fe0..ef1005755 100644
--- a/variants/hornbill32dev/pins_arduino.h
+++ b/variants/hornbill32dev/pins_arduino.h
@@ -9,7 +9,12 @@
 #define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
 #define digitalPinHasPWM(p)         (p < 34)
 
-static const uint8_t TX = 1;  
+static const uint8_t LED_BUILTIN = 13;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+
+static const uint8_t KEY_BUILTIN = 0;
+
+static const uint8_t TX = 1;
 static const uint8_t RX = 3;  
 
 static const uint8_t SDA = 21;  
diff --git a/variants/lolin32/pins_arduino.h b/variants/lolin32/pins_arduino.h
index cde7c0b41..e341357b0 100644
--- a/variants/lolin32/pins_arduino.h
+++ b/variants/lolin32/pins_arduino.h
@@ -9,8 +9,10 @@
 #define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
 #define digitalPinHasPWM(p)         (p < 34)
 
-#define LED_BUILTIN 2
-#define KEY_BUILTIN 0
+static const uint8_t LED_BUILTIN = 2;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+
+static const uint8_t KEY_BUILTIN = 0;
 
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;
diff --git a/variants/nano32/pins_arduino.h b/variants/nano32/pins_arduino.h
index 7a1cb9825..e50bd30d9 100644
--- a/variants/nano32/pins_arduino.h
+++ b/variants/nano32/pins_arduino.h
@@ -9,7 +9,10 @@
 #define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
 #define digitalPinHasPWM(p)         (p < 34)
 
-#define LED_BUILTIN 16
+static const uint8_t LED_BUILTIN = 16;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+
+static const uint8_t BUILTIN_KEY = 0;
 
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;
diff --git a/variants/node32s/pins_arduino.h b/variants/node32s/pins_arduino.h
index 85452d36d..e341357b0 100644
--- a/variants/node32s/pins_arduino.h
+++ b/variants/node32s/pins_arduino.h
@@ -9,6 +9,11 @@
 #define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
 #define digitalPinHasPWM(p)         (p < 34)
 
+static const uint8_t LED_BUILTIN = 2;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+
+static const uint8_t KEY_BUILTIN = 0;
+
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;