diff --git a/variants/start/pins_arduino.h b/variants/start/pins_arduino.h
index 8a95936..1c0907c 100644
--- a/variants/start/pins_arduino.h
+++ b/variants/start/pins_arduino.h
@@ -168,11 +168,17 @@ void spi_onBegin(uint8_t spiNum);
 static inline void spi_onEnd(uint8_t spiNum){}
 
 // I2C
-#define PIN_WIRE_SDA  (P1_12)
-#define PIN_WIRE_SCL  (P1_13)
-#define I2C_NUM       (1) // i2c number 1
-static const uint8_t SDA = PIN_WIRE_SDA;
-static const uint8_t SCL = PIN_WIRE_SCL;
+#define I2C_COMMON_QTY    2
+// Wire (I2C1)
+#define PIN_WIRE_SDA      P1_12
+#define PIN_WIRE_SCL      P1_13
+static const uint8_t      SDA = PIN_WIRE_SDA;
+static const uint8_t      SCL = PIN_WIRE_SCL;
+// Wire1 (I2C0)
+#define PIN_WIRE_SDA1     P0_9
+#define PIN_WIRE_SCL1     P0_10
+static const uint8_t      SDA1 = PIN_WIRE_SDA1;
+static const uint8_t      SCL1 = PIN_WIRE_SCL1;
 // available frequencies
 #define WIRE_FREQ_100K    100000
 #define WIRE_FREQ_400K    400000