42+ Arduino Uno R3 I2C Pins Pics. The latest arduino uno r3 was released in 2011 and it is the third revision of uno boards. For both boards they are connected to the correct pins.

I2C Tutorial for Arduino and ESP8266 with practical ... from diyi0t.com

Power the i2c protocol was designed to enable communication between components on a single circuit board. I see on arduino uno there is twice sda and sdl: With i2c there are 2 wires referred to as scl and sda.

Power the i2c protocol was designed to enable communication between components on a single circuit board.

With i2c there are 2 wires referred to as scl and sda. What is inside an arduino? In this arduino i2c tutorial we will use i2c communication between two arduino boards and send (0 to 127) values to each other by using potentiometer. The image below shows the i2c pins present in arduino uno.