diff --git a/src/RS485.cpp b/src/RS485.cpp
index 2f018e7..0444b93 100644
--- a/src/RS485.cpp
+++ b/src/RS485.cpp
@@ -166,4 +166,12 @@ void RS485Class::setPins(int txPin, int dePin, int rePin)
   _rePin = rePin;
 }
 
+#if defined(CONTROLLINO_MAXI) || defined(CONTROLLINO_MEGA)
+RS485Class RS485(SERIAL_PORT_HARDWARE3, CONTROLLINO_RS485_TX, CONTROLLINO_RS485_DE, CONTROLLINO_RS485_nRE);
+#elif defined(__AVR_ATmega2560__)
+RS485Class RS485(Serial3, RS485_TX_PIN, RS485_DE_PIN, RS485_nRE_PIN);
+#elif defined(__AVR_ATmega328P__)
+RS485Class RS485(Serial, RS485_TX_PIN, RS485_DE_PIN, RS485_nRE_PIN);
+#else
 RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS485_DEFAULT_DE_PIN, RS485_DEFAULT_RE_PIN);
+#endif
diff --git a/src/RS485.h b/src/RS485.h
index 24b976f..47cf15f 100644
--- a/src/RS485.h
+++ b/src/RS485.h
@@ -22,6 +22,20 @@
 
 #include <Arduino.h>
 
+#if defined(CONTROLLINO_MAXI) || defined(CONTROLLINO_MEGA)
+#include <Controllino.h>
+#endif
+
+#if defined(__AVR_ATmega2560__)
+    #define RS485_DE_PIN    21
+    #define RS485_nRE_PIN   20
+    #define RS485_TX_PIN    14
+#elif defined(__AVR_ATmega328P__)       
+    #define RS485_DE_PIN    3
+    #define RS485_nRE_PIN   2
+    #define RS485_TX_PIN    1
+#endif
+
 #ifdef PIN_SERIAL1_TX
 #define RS485_DEFAULT_TX_PIN PIN_SERIAL1_TX
 #else