Update README.md

Author: budulinek

README.md

@@ -18,11 +18,14 @@ Transparent gateway Modbus RTU <---> Modbus TCP / Modbus UDP for Arduino
   * requests to responding slaves are processed first
 
 ## Connections
-  Arduino - MAX485
-  Tx1 - DI
-  Rx0 - RO
-  Pin 6 - DE,RE
-  
+Arduino <-> MAX485
+
+Tx1 <-> DI
+
+Rx0 <-> RO
+
+Pin 6 <-> DE,RE
+
 ## Settings
 * RS485 settings
   * BAUD