Arduino Nano I2C pins still wrong on product page

Created on 29 Jun 2018 · 4Comments · Source: arduino/Arduino

Hello

There is a lack of clarity on the documentation page for Arduino Nano regarding pins designated for I2C comms. (here - https://store.arduino.cc/arduino-nano)

"I2C: 4 (SDA) and 5 (SCL). Support I2C (TWI) communication using the Wire library (documentation on the Wiring website)."
Yes this paragraph follows a short discussion of Analog Pins - however for clarity, it should be made explicit that the sentence refers to pins A4 and A5. Not Digital pins 4, 5.

Could help a few people out - still see posts in forums with confusion as to why I2C isn't working w Nano boards.

Cheers

Documentation

Source

Ojsh

👍4

Most helpful comment

Yeap. Been there. Pull some hairs out and wasted a good couple of hours.

Just use this schematic. For me, they are so much easier to read anyway.

arduino-nano-pin

Caine78 on 30 Nov 2018

👍3

All 4 comments

Yeap. Been there. Pull some hairs out and wasted a good couple of hours.

Just use this schematic. For me, they are so much easier to read anyway.

arduino-nano-pin

Caine78 on 30 Nov 2018

👍3

Done thanks

agdl on 12 Dec 2018

Agree. This picture is much easier to understand than these:
https://store.arduino.cc/arduino-nano
https://content.arduino.cc/assets/Pinout-NANO_latest.pdf

(Found I2C Bus A4+A5 pins within 5 sec.)

Thanks for sharing!

PizzaProgram on 20 Mar 2020

the power of the internet .... I too wasted hours and started suspecting iI'm looking in the wrong place so did a search for "i2c nano problem" that took me here ...