Wire.begin()
Initiate the Wire library and join the I2C bus as a master or slave. This should normally be called only once. Slave mode is not supported yet
Wire.begin()
Wire.begin(address);
Wire.begin(address, scl, sda);
Wire.begin(address, scl, sda, *buffer, len);
address:
the 7-bit slave address (optional); if not specified, join the bus as a master. For master device the default address is 0.
scl:
pin SCL.
sda:
pin SDA.
buffer:
pointer to memory buffer. In case of master device buffer is used for outgoing data; In case of slave device the half of buffer is used for incoming data and the second half is used for outgoing data.
len:
buffer size in bytes.
nothingreturns error code. 0 means success.
