libraries/Wire/examples/i2c_master/i2c_master.ino

@@ -42,13 +42,12 @@ uint8_t masterGetData(uint8_t *buf, uint8_t dataSize)
 
 void setup() 
 {  
-  Serial.begin(115200);
+  Serial.begin(57600);
   while (!Serial);
   Serial.println("I2C master start");  
 
   // Initialize the device on the I2C bus as a master
   Wire.begin(); 
-  Wire.setClock(400000);
 }
 
 void loop() 

libraries/Wire/examples/i2c_slave/i2c_slave.ino

@@ -73,7 +73,7 @@ void receiveEvent(int bytesNum)
 // ----------------------------------------- //
 void setup() 
 {  
-  Serial.begin(115200);
+  Serial.begin(57600);
   while (!Serial);
   Serial.println("I2C slave start");