28+ Arduino Nano I2C Pins Pictures. That requires only two signal lines and was developed for communication between. The arduino nano has several default pins that are used for communication between the arduino board and a computer or other devices.
Introduction to Arduino Nano - The Engineering Projects from www.theengineeringprojects.com I made a quick start guide for this tutorial that you can download and go back to later if you can't set this up. This amount of pins is needed because your arduino is communicating via a parallel interface, with the display. I got some arduino nanos at really good price on amazon and wanted to connect a 7 segment led display with an i2c backpack.
Arduino uno also has one uart, one spi and one i2c interface on board.
The arduino nano is very much similar to the arduino uno. How to use a i2c multiplexer on your arduino / esp8266 you will find two gpios (sda and scl) for the i2c communication. Many arduino sensors and modules are enabled for i2c communication. Out of the 14 digital input / output pins 5 pins are pwm (pulse width modulation).
