Download Arduino Nano I2C Port Pictures. I got some arduino nanos at really good price on amazon and wanted to connect a 7 segment led display with an i2c backpack. The chips used on the arduino board (the atmega8 and atmega168) have three each port is controlled by three registers, which are also defined variables in the arduino language.

How To Connect Multiple I2c Interface Devices Into A Single Pin A4 Sda And A5 Scl On Arduino Electrical Engineering Stack Exchange from i.stack.imgur.com

I had some confusion initially but later found out that sda and scl on arduino nano are available on a4 and a5 pins. Which pins you need for arduino and esp8266 microcontroller to connect devices through i2c. I2c a4 (sda) and a5 (sca):

How to use a i2c multiplexer the i2c communication is one out of three possible communication protocols, the arduino.

Which pins you need for arduino and esp8266 microcontroller to connect devices through i2c. The arduino nano is very much similar to the arduino uno. I had some confusion initially but later found out that sda and scl on arduino nano are available on a4 and a5 pins. The chips used on the arduino board (the atmega8 and atmega168) have three each port is controlled by three registers, which are also defined variables in the arduino language.