Inter-Integrated Circuit (I2C) Protocol | Arduino Documentation
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 pins should I use for I2C on Arduino Uno - Stack Overflow
I2C requires SDA and SCL pins. I see on Arduino UNO there are 2 SDAs and SCLs: The 2 first two pins side to the USB connector are SDA/SCL according to the documentation. And the …
How to Setup I2C Communication on the Arduino - Circuit Basics
For Arduino Uno boards, these are pins A4 and A5. Pin A4 is the SDA pin, and pin A5 is the SCL pin. In the Arduino Uno R3 version, there is another set of I2C pins near the USB socket: To …
Arduino Uno SDA SCL Pinout - Complete Guide and Diagram
Understanding the pinout of SDA and SCL is essential for successfully integrating Arduino Uno into a wide range of projects. Imagine working on a project where you need to connect multiple …
Interfacing I2C LCD With Arduino UNO : 4 Steps - Instructables
To overcome this limitation, you can use an I2C LCD display, which communicates via the I2C protocol and requires only two pins —SDA and SCL. These are not regular digital I/O pins, …
Arduino I2C Tutorial | Arduino Wire Library I2C Communication
For example, the Arduino (Atmega328p) microcontroller supports up to the Fast-Mode (Fm) which has a data transfer rate up to 400 kHz. The I2C bus uses what’s known as an open-drain (or …
Arduino Arduino I2c | Arduino - ElectronicWings
SDA (serial data) wire is used for data exchange in between the master and slave device. SCL (serial clock) is used for the synchronous clock in between master and slave device.
Arduino I2C Tutorial: I2C Communication Between Arduino …
One wire is SCL (serial clock line) which synchronizes the transmission of data between devices and the other wire is SDA (serial data) which carries the actual data to be transmitted. These …
Wire | Arduino Documentation
Aug 5, 2025 · Due to the hardware design and various architectural differences, the I2C pins are located in different places. The pin map just below highlights the default pins, as well as …
How to Select Pin for I2c on an Arduino Uno - Delft Stack
Mar 4, 2025 · I2C is a multi-master, multi-slave protocol that uses two wires for communication: the Serial Data Line (SDA) and the Serial Clock Line (SCL). The Arduino Uno has dedicated …