From 9c8778646418bb4d6c1c493bfbe473405a002e1f Mon Sep 17 00:00:00 2001
From: ManuelMcLure <manuel@mclure.org>
Date: Fri, 23 Aug 2019 18:55:41 -0700
Subject: [PATCH] Change default Re-ARM UART pin order (#15037)

---
 Marlin/src/pins/lpc1768/pins_RAMPS_RE_ARM.h | 32 +++++++++++++++------
 1 file changed, 24 insertions(+), 8 deletions(-)

diff --git a/Marlin/src/pins/lpc1768/pins_RAMPS_RE_ARM.h b/Marlin/src/pins/lpc1768/pins_RAMPS_RE_ARM.h
index c3951d4071cf..8e4bfeb8b9dc 100644
--- a/Marlin/src/pins/lpc1768/pins_RAMPS_RE_ARM.h
+++ b/Marlin/src/pins/lpc1768/pins_RAMPS_RE_ARM.h
@@ -128,17 +128,33 @@
   // P2_08 E1-Step
   // P2_13 E1-Dir
 
-  #define X_SERIAL_TX_PIN  P2_13
-  #define X_SERIAL_RX_PIN  P2_13
+  #ifndef  X_SERIAL_TX_PIN
+    #define X_SERIAL_TX_PIN  P0_01
+  #endif
+  #ifndef X_SERIAL_RX_PIN
+    #define X_SERIAL_RX_PIN  P0_01
+  #endif
 
-  #define Y_SERIAL_TX_PIN  P0_00
-  #define Y_SERIAL_RX_PIN  P0_00
+  #ifndef Y_SERIAL_TX_PIN
+    #define Y_SERIAL_TX_PIN  P0_00
+  #endif
+  #ifndef Y_SERIAL_RX_PIN
+    #define Y_SERIAL_RX_PIN  P0_00
+  #endif
 
-  #define Z_SERIAL_TX_PIN  P0_01
-  #define Z_SERIAL_RX_PIN  P0_01
+  #ifndef Z_SERIAL_TX_PIN
+    #define Z_SERIAL_TX_PIN  P2_13
+  #endif
+  #ifndef Z_SERIAL_RX_PIN
+    #define Z_SERIAL_RX_PIN  P2_13
+  #endif
 
-  #define E0_SERIAL_TX_PIN P2_08
-  #define E0_SERIAL_RX_PIN P2_08
+  #ifndef E0_SERIAL_TX_PIN
+    #define E0_SERIAL_TX_PIN P2_08
+  #endif
+  #ifndef E0_SESIAL_RX_PIN
+    #define E0_SERIAL_RX_PIN P2_08
+  #endif
 
 #endif