How I2C Communication Works and How To Use It with Arduino

In this tutorial we will learn how the I2C communication protocol works and also we will make a practical example of it with the Arduino Board and a sensor which uses this protocol. You can watch the following video or read the written tutorial below.

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[rahulfromkerala]

2 hours of reading and then here comes this video where everything is well explained in under 10 minutes... You tube is spoiling me...

[thesauceboss]

This is one of the only videos I've found that explains how pull up resistors can affect the speed at which data can travel on the SDA line. Fantastic video that explains how I2C works. Great job.

[mark]

Awesome video! I especially appreciated the protocol/packet breakdown. Thanks very much!

[vijaykumar-hcjz]

The bit sequence was so well explained that I had to print the screenshot of it for future reference.

[kiranbs]

Watched many videos on this protocol I was never able to grab the concept clearly and I found your tutorial and it made my life simple . Thanks man u have explained and visualised the concept neatly .

[kamuizero]

What a great video! Very clear explanation and simple demonstration on how to use it.

Thank you very much.

[RamswaroopSorencool]

This is so beginner friendly! Thank you so much. I used the same illustrations to make few students understand the same. :)

[elonmuskmtmt]

This is by far the most thorough and yet still concise explanation I have found! Awesome video!

[nobodyspecial]

Sweet tutorial! Really like the illustrations that went along with your explanation. After looking at a few cool project videos where people are using Arduinos and other microcontrollers, it makes me wish my college had a class on these!

[AliHSyed]

OMG thank you so much, I've been so lost with i2c until I watched this video!

Very useful for beginner like me, thank you! :)

[markconger]

Thank you for this tutorial! I knew the overview of how i2c works but not the specifics. It looks similar to packets in TCP/IP.

[GetElectronics]

I always like tutorials that show how to use sensores without relying on 3rd party libraries other than the wire one. Very useful for learning.

[morgard]

Thanks! I didn't want to memorize it, but to understand it and it worked! :)

[PhDFernandoCoach]

Thank you very much for this video, Dejan! The information is clear, well organized and dynamically illustrated!

[omaralharran]

You are the best. Thank you for taking the time to explain I2C on such indepth level.

[fleshTH]

This was extremely well done! Good job! It was very clear and now i'm off to do some new projects.

[ExtantFrodo]

I now understand what I could not understand previously. Thank you.

[danielrufenacht]

Hello Dejan
Many thanks for your time to spend in order to explain us these very clear tutorials.
Daniel from Switzerland

[nalorin]

SUPER helpful tutorial! Thank you so much!
I have an ALS31313, and all the code examples I could find online (including the manufacturer's website) don't work.
Your tutorial makes things SO much clearer and I managed to get my magnetometer working within 15 minutes of watching your video!
THANK YOU!!!