Arduino Basics: Arduino to Arduino Communication

In this video we answer the quiestion: How I can I get one Arduino to talk to another. There are many ways to do this, for our purposes we are using IIC or I2C however you want to write it to pass a varible from one Arduino to another.
Info about I2c:
www.i2c-bus.org/i2c-bus/
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[@demiurgiac]

Exactly what I was looking for but didn't know how to do it. Worked the first try. Thanks! (5 years later!)

[@kobedde]

Clearly explained. Finally a simple tutorial that works!
Just what I needed.
Thank you.

[@georgechambers3197]

Cool, now they can have a party! Very interesting technique. Good video as usual.

[@abhishekshetty5965]

thank you so much bro for such an informatuve video

[@n0ukf]

Is there any handshaking back to master or is it totally blind sending whether there's a slave or not?

[@tanmeowsoon5252]

Hi sir good day i want to know how to put in the program 2 Arduino board with a different com port step by step if you have it can guide me ,Thanks you

[@softa74]

how to send more different variables

[@jrs88888]

This was interesting. Could You connect more than 2 devices and have them communicate over the same bus?

[@adamadness2283]

Up to 128

[@drakkorvladimir4012]

Awesome except I am trying to do it with two Blue Pill STM32. Any ideas? : )

[@anthony4acre]

I have a question can you run 2 arduino modules communicating on 1 wire & ground instead of 2 wires & ground. Cheers.

[@learnelectronics]

Rx and tx. Floating ground could be an issue but no way to predict it.