Arduino wire library location9/9/2023 ![]() When this information is sent - bit after bit -, the called upon device executes the request and transmits its data back - if required - to the board over the same line using the clock signal still generated by the Controller on SCL as timing. As the clock line changes from low to high (known as the rising edge of the clock pulse), a single bit of information - that will form in sequence the address of a specific device and a a command or data - is transferred from the board to the I2C device over the SDA line. The I2C protocol involves using two lines to send and receive data: a serial clock pin (SCL) that the Arduino Controller board pulses at a regular interval, and a serial data pin (SDA) over which data is sent between the two devices. USB stands for Universal Serial Bus and I2C for Inter-Integrated Circuit and this protocol widely used for short distance communication. And like USB this one also need 4 pins, VCC, GND, SDA, SCL. ![]() As like USB port we can pair up to 127 devices to this I2C port. ![]() These are generally used in microcontrollers having SDA and SCL pins. Hello guys, today in this basic tutorial we will learn about I2C and I2C addresses.
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