There are easy ways of getting more I/O pins for any project; shift registers, I2C expanders, or ADCs will give you plenty of pins for whatever project you have in mind. All these require extra com… ...

It’s not a particularly demanding device, but when it works you know the basics are working. And it did. The ESP’s dedicated I2C pins are on GPIO 21 and 22 for data and clock respectively.

This articles describes how you can use I2C (TWI) communication, Arduino and temperature sensors to measure 3 different temperatures. It can be very helpful when you want to measure the outside, ...

Some Arduino boards feature the I2C pins in different places, and you can check out the full hardware requirements for all Arduino boards on the Wire Library Reference page.

Adafruit has this week announced the arrival of the new Arduino compatible TCA9548A I2C Multiplexer to their online shop, which is now available to purchase priced at $6.95.