I got some Arduino Nanos at really good price on amazon and wanted to connect a 7 segment LED display with an I2C backpack.

I had some confusion initially but later found out that SDA and SCL on Arduino Nano are available on A4 and A5 pins.

  • SDA -> A4
  • SCL -> A5

In order to make them work , be sure to include the wire.h library.

Here are all the pins for the Arduino Nano.

Arduino Nano PinsIf you are interested in gaining Arduino skills and learning some programming strategies, I would recommend the following book.

SDA and SCL on Arduino Nano I2C
Arduino: Simple and Effective Strategies to Arduino Programming

In the mean time enjoy the short video.

Device List