[SOLVED] I2C Communication on pins D3/D4

Hardware Arduino Zero
4

SOLVED!

I solved my problem by changing the following code lines:

in "variant.h" :

#define PIN_WIRE_SDA         (4u)  
#define PIN_WIRE_SCL         (3u)

in variant.cpp

  { PORTA,  9, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL/*|PIN_ATTR_PWM|PIN_ATTR_TIMER*/), No_ADC_Channel, NOT_ON_PWM,   NOT_ON_TIMER,     EXTERNAL_INT_9 }, 
  { PORTA,  8, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL/*|PIN_ATTR_PWM|PIN_ATTR_TIMER*/), No_ADC_Channel, NOT_ON_PWM,   NOT_ON_TIMER,     EXTERNAL_INT_NMI },

in Wire.cpp

TwoWire Wire(&sercom2);

void SERCOM2_Handler(void) {
  Wire.onService();
}

Now, I have the I2C communication working on ports D3/D4(PA09/PA08) very well!

Regards!