Wire (I2C)

beginTransmission()

Wire.beginTransmission, beginTransmission

Begin a transmission to the I2C slave device with the given address. Subsequently, queue bytes for transmission with the write() function and transmit them by calling endTransmission().

// SYNTAX
Wire.beginTransmission(address);

Parameters: address: the 7-bit address of the device to transmit to.

Since 1.5.0:

Instead of passing only an address, a WireTransmission object can be passed to Wire.beginTransmission() allowing the address and optional parameters such as a timeout to be set. I2C_ADDRESS is a constant specifying the Wire address (0-0x7e) for your specific I2C device.

// EXAMPLE
Wire.beginTransmission(WireTransmission(I2C_ADDRESS));

// EXAMPLE WITH TIMEOUT
Wire.beginTransmission(WireTransmission(I2C_ADDRESS).timeout(100ms));