diff --git a/platform.txt b/platform.txt
index 223a8945..a35396e8 100644
--- a/platform.txt
+++ b/platform.txt
@@ -20,7 +20,7 @@
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5---3rd-party-Hardware-specification
 
 name=Adafruit SAMD (32-bits ARM Cortex-M0+ and Cortex-M4) Boards
-version=1.2.7
+version=1.2.8
 
 # Compile variables
 # -----------------
diff --git a/variants/trellis_m4/variant.cpp b/variants/trellis_m4/variant.cpp
index c11117b9..8f44f8ae 100644
--- a/variants/trellis_m4/variant.cpp
+++ b/variants/trellis_m4/variant.cpp
@@ -63,10 +63,10 @@ const PinDescription g_APinDescription[]=
   { PORTA, 24, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_8 }, // USB/DM
   { PORTA, 25, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_9 }, // USB/DP
 
-  // 21..22 I2C pins (SDA/SCL)
+  // 21..22 I2C pins (SDA/SCL) or Serial1 Pins
   // ----------------------
-  { PORTB,  8, PIO_SERCOM_ALT, PIN_ATTR_ANALOG, ADC_Channel2, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_12 }, // SERCOM 2.0
-  { PORTB,  9, PIO_SERCOM_ALT, PIN_ATTR_ANALOG_ALT, ADC_Channel1, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_13 }, // SERCOM 2.1
+  { PORTB,  8, PIO_SERCOM_ALT, PIN_ATTR_ANALOG, ADC_Channel2, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_12 }, // SERCOM 4.0
+  { PORTB,  9, PIO_SERCOM_ALT, PIN_ATTR_ANALOG_ALT, ADC_Channel1, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_13 }, // SERCOM 4.1
 
   // ----------------------
   // 23 - 28 QSPI (SCK, CS, IO0, IO1, IO2, IO3)
@@ -109,3 +109,22 @@ SERCOM sercom2( SERCOM2 ) ;
 SERCOM sercom3( SERCOM3 ) ;
 SERCOM sercom4( SERCOM4 ) ;
 SERCOM sercom5( SERCOM5 ) ;
+
+Uart Serial1( &sercom4, PIN_SERIAL1_RX, PIN_SERIAL1_TX, PAD_SERIAL1_RX, PAD_SERIAL1_TX ) ;
+
+void SERCOM4_0_Handler()
+{
+  Serial1.IrqHandler();
+}
+void SERCOM4_1_Handler()
+{
+  Serial1.IrqHandler();
+}
+void SERCOM4_2_Handler()
+{
+  Serial1.IrqHandler();
+}
+void SERCOM4_3_Handler()
+{
+  Serial1.IrqHandler();
+}
diff --git a/variants/trellis_m4/variant.h b/variants/trellis_m4/variant.h
index 94d7f844..f3eb6a9b 100644
--- a/variants/trellis_m4/variant.h
+++ b/variants/trellis_m4/variant.h
@@ -124,8 +124,8 @@ static const uint8_t LINE_RIGHT = PIN_LINE_RIGHT;
  */
 
 // Serial1
-#define PIN_SERIAL1_RX       (0ul)
-#define PIN_SERIAL1_TX       (1ul)
+#define PIN_SERIAL1_RX       (22ul)
+#define PIN_SERIAL1_TX       (21ul)
 #define PAD_SERIAL1_RX       (SERCOM_RX_PAD_1)
 #define PAD_SERIAL1_TX       (UART_TX_PAD_0)
 
@@ -214,6 +214,8 @@ extern SERCOM sercom3;
 extern SERCOM sercom4;
 extern SERCOM sercom5;
 
+extern Uart Serial1;
+
 #endif
 
 // These serial port names are intended to allow libraries and architecture-neutral
@@ -233,6 +235,9 @@ extern SERCOM sercom5;
 //                            pins are NOT connected to anything by default.
 #define SERIAL_PORT_USBVIRTUAL      Serial
 #define SERIAL_PORT_MONITOR         Serial
+#define SERIAL_PORT_HARDWARE        Serial1
+#define SERIAL_PORT_HARDWARE_OPEN   Serial1
+
 
 #endif /* _VARIANT_MERTO_M4_ */