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 PinsDevice List

Go a step further and control appliances with your Arduino Nano

Now take it a step further and control and automate something in your house with Arduino Nano and the IoT Power Relay. Just like the relays that you are used to but all enclosed, tested and done for you so can use it and reuse it. Watch the short video to see how it works.

Get the IoT Power relay