onReceive(): This is defined as a function by the slave and is called when data is received from the master.setClock(): This is used by the master to set the clock frequency.read(): The function for reading a byte of data from the I2C bus.available(): Both the master and the slave use this function to calculate the number of bytes received (by the “read()” function).write(): Both the master and the slave use this function to send data to the I2C bus.endTransmission(): The communication started by the previous function ends using this function.beginTransmission(): This function which is used by the master starts the communication with a special slave using its address.The number of bytes and also the slave address are specified in this function. requestFrom(): this function is used on the master side and can be used to request data transmission from the slave.begin(): Using this function, you can determine the Arduino board to be the master or the slave.This library has a lot of useful functions, including: Working with the I2C communication protocol would be so easy using this library. To work with the I2C protocol, we use the “Wire” library, which is one of the Arduino IDE libraries.
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