I2C Part 1 - Using 2 Arduinos

I2C communications is a very important topic, so important that I’ve decided to do several videos about it. In this first video, I will explain what I2C is and how to use it to communicate between two Arduino's.
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Today we will discuss I2C, or “Inter-Integrated Circuit” communications.
I2C is a two-wire, low-speed serial communications format that was originally developed by Phillips (now NXP) in 1982. Although its original use was to allow integrated circuits in televisions to communicate with one another it has evolved into a standard communications method used by a myriad of devices.
I2C works with the concept of “Master” and “Slave” devices. The master device provides the clock signal and initiates communications with the slaves. An I2C bus can have multiple masters and slaves, but only one master can be active at any given time.
We have used I2C devices in lots of projects and tutorials before. Today we will use I2C to communicate between two Arduinos.
In future videos I will show you more about using I2C:
Creating your own I2C devices out of common sensors and small Arduino's.
Communicating between Raspberry Pi and Arduino with I2C.
Using multiple masters on an I2C bus.
Today we will just cover the basics. We will first exchange information between two Arduinos and then we will use a potentiometer on one Arduino to control an LED on a second one via I2C.
Here is what is in today's video:
00:00 - Introduction
04:28 - Understanding I2C
07:40 - Exchanging data between two Arduino's
15:25 - Controlling one Arduino with another one
As always you can get the sketches on the article that accompanies this video. While you're on the website feel free to check out the other articles I have, and be sure to sign up for my newsletter .
As always I appreciate your support, thanks for watching!

[@TalkingGIJoe]

If my shop was this clean, I'd never get any work done... I'd just sit there and stare at how beautiful it is! Nice video too...

[@whitefields5595]

Very professional, perfect pace, top quality presentation.

[@r1273m]

Excellent video as always. The quality of your production is unsurpassed. I am really looking forward the follow up videos. Bob

[@Slimey117]

as much as i agree with you, GreatScott is better

[@amnesie6615]

This is the best video I found on the web! Thank you very much, exactly what I was looking for, because I am running out of pins on my arduino, with this master-slave via I2C I could "expand" my pins via another arduino! GREAT!

[@MartinBgelund]

GREAT choice of topic(s)!!! This is a perfect match with what I'm fiddling with on my robot, and there's a lot to take into account and many choices to make, so I am very excited about you taking up I2C on your channel.

[@dwsan1tx]

Thank you. It’s evident you have put a lot of effort to document your presentation and present it very well. Bravo sir!

[@AgeingBoyPsychic]

Just started with Arduino recently and this channel is a godsend! Clear, concise and really well produced. Thank you for making these!

[@cschmitz]

This was a fantastic video and explanation. Def looking forward to part 2!!

[@devikwolf]

I've been playing with circuits and microcontrollers for a couple decades at this point... but thanks to your videos, a lot of things which I had previously learned to do 'by rote' I now have a better fundamental understanding of. You importantly explain not only the 'how' but also the 'why' when you do something, and that 'why' is what really allows ME to engage my own creativity!

[@afah6850]

hey im doing my diploma in computer engineering but what job could i get if im really good at this circuits and microcontrollers, Im really interested in them

[@estar4480]

It is one of the best videos I have seen when it comes to explaining anything related to electronics. EXCELLENT WORK!!

[@irgski]

Good example, good editing and a clean and organized lab!

[@bluescream7463]

Wow, This is an eye opener for me. Thanks for this clear presentation. Appreciation to your work ! Many Thanks !

[@anonymous.youtuber]

Thank you so much . You truly have the gift of teaching. Respect. 🙏🏻

[@andrewparker2751]

That was the best description & explanation of I2C I've found. Excellent work, and thanks for the video!

[@davidfarning8246]

Fantastic Series. I am currently familiarizing myself with Arm Cortex M Microprocessors using a TI Launchpad. For the last several weeks I have been watching your Arduino videos to learn the concepts and then figure out how to implement them on the launchpad.

[@MrBanzoid]

Top class video as usual. Thanks very much. I've just taken my box of Arduino bits'n'bobs out of retirement and following your vids from the start trying all the experiments that I have the modules for.

[@grayfaux_]

You make learning about i2c simple. Love it.

[@paulwright4765]

As always, another great video. Thank you!

[@DDA40Xman]

Thanks for the video, I'm learning I²C so great timing. I bought a I²CDriver monitor board to help understand signaling and commands.

[@hc1770]

Very informative and clear explanation. Can’t wait for the up coming videos!

[@renaldsurpris115]

You are the best teacher I have ever seen. Fantastic job. Love it

[@josephotieno898]

Great job and Excellent explanations as usual. Can’t be more clear...

[@Javier_Corado]

Loved the video, cant wait for the video where you explain the integration of i2c with a normal sensor

[@espenbgh2540]

Very excellent video, calm voice and pace, as it's easy to follow - keep up the god work.

[@josefaschwanden1502]

Thats blasphemy

[@liukaiyu683]

Thank you, professional and clear explanations! EXCELLENT!!!

[@paulvanwagoner7273]

Excellent demo of using I2c, exactly what I was looking for

[@guyd6]

Another time against, it's excellent. We need someone like you. Thanks

[@konturgestalter]

Great Series!!! Please continue the great work!!

[@DailyCakeSlice]

I literally JUST started a project where I wanted to use this! Perfect timing, thanks! :)

[@DownTownDowns]

What a coincidence, me as well

[@michaellove7912]

People like you make the world a better place

[@tomdilen7062]

best teacher of the universum, thanx sir

[@JerryEricsson]

Thanks a billion, I have been using and loving the I2C for years now, but never really understood how it worked, I just knew it did and loved the way it did. Now I have a much better understanding of the history and actions capable using the bus, it all makes much more sense now.

[@matztron1872]

Good pacing and great introduction into I2C. Thanks!

[@MyJaniu]

Wielkie dzięki za konkretną informację . Pozdrawiam.

[@Ninjamstrboy]

Great work! Thank you for the beautiful video.

[@PhG1961]

Excellent video and crystal clear explained ! Well done !

[@ModestMaker]

Thanks for the code and the tutorial which helped me solve a challenging problem. Your information is acknowledged in code and information I've posted on my own channel; most helpful!

[@patrickmclaughlin6013]

Thanks Bill. Very thorough introduction.

[@3nagib]

Another great video.thanks again Waiting for the next one

[@northshorepx]

excellent tutorial. I now get how to do both sides of the Wire protocol.

[@rickcook5335]

Great video. Really helped me with my arduino adventure

[@geoffwade8144]

I enjoyed this lesson and found it very helpful, thank you.

[@jankuhlmann9196]

Thanks for all the hard work you do. Just wanted to let you know that the example code on the website for the LED slave example has some extra code included, there are two setup() code blocks.

[@gasko2762]

Thank you so much for this tutorial. Very excellent video.

[@newburypi]

Great one! Clearified some questions I had on using wire. Thanks.

[@Lorenzo0077]

your videos are really interesting and well explain, thanks !

[@PLanBBeaTZ]

Very clear to the point video! Thanks for uploading

[@RastaJediX]

Wonderful video. Thank you so much! I've never heard the clock line referred to as "SDC", only "SCL".

[@Nick-ye5kk]

Please keep making these excellent videos.

[@vladstrulev]

Thank you for your work! Much appreciated.

[@khulekanindlovu2773]

Good video, quality and thoroughness

[@SimonsRandomRants]

Love your videos. Thank you. I use cheap Chinese Arduino UNO's. I had to put in the pull up resistors to 5V before communications could work. Thank you.

[@ukwerna]

Hope all is well, thanks, as always!

[@dieterrahn2720]

Many thanks for sharing your expirience with us!

[@JonBck]

Nice video. Exactly what I was looking for. Thanks!!!

[@erinasimpson4289]

I have no idea who you are, but I would like you to know that you have saved my life

[@marcofe82]

Really excellent video! Great job and thank you so much!

[@bigheat86]

nice one. always wanted to know more about I2C

[@moinshaikh6684]

Excellent tutorials sir, became a fan!

[@nalinux]

Thanks, it's very clear and easy to understand.

[@Christoph1888]

Your just such a good teacher!

[@SHANUSHAH]

Well presented again , cool video.

[@ericgrante7043]

Bonjour, Excellent vidéo, langage clair et agréable. Merci pour tes video. bonne journée

[@matthieuvanderbugh9749]

I am from Holland and I injoy all what I see here Thank you Smile2U

[@inayathussain9236]

wait is over.... i was waiting for this topic since a couple of months

[@vonries]

Hold on to your hat; you're in for a ride. This is a multi- part series so more is coming down the road. Plus if you're not a long time viewer, you can always go back and watch his previous I2C videos. Sadly I did not see a playlist, but he did say at the beginning of the videos which devices he has already covered that use I2C. You might be able to find them that way. Good luck, and have a great week waiting for the next video.

[@inayathussain9236]

@@vonries thanks. I've seen every video of dronebot workshop. i remember first video was IR sensor

[@frankjonathansaenz1911]

I love your videos!! Keep making such great videos. They are very helpfull, too. :)

[@p.g.pg38]

Thanks a lot for this video (and for the futures) and thank you for the full article which is essential for those whose English is not the native language.😜

[@zebratangozebra]

Very cool and excellently demonstrated.

[@dsbohra]

Excellent explanation.

[@ovidiurosu6632]

very good video; looking forward to the next one :)

[@marknailis]

Excellent explanation

[@AhmadAsmndr]

thank you very much your Videos are the best.

[@ahajet3450]

thank you for your effort , It is a wonderful video

[@bperkins]

Very informative. Thanks!

[@thecraftsman8083]

Best tutor online!

[@usamabinrafique127]

What a nice and fine explanation.. Thank you :)

[@felaflame]

Excellent explanation!

[@mehmetaltinsoy525]

Great video. Thanks

[@chigypt]

Niice Video again, very good work DroneBot

[@ninhnguyen8488]

nice work! very easy to understand

[@ayushkaiwart2451]

Quality content.

[@user-hj4bm1kz2l]

Just perfect. Thanks

[@tamilmaranc]

Great explanations sir

[@mr.bianchirider8126]

Great video. I hope you be covering the use of the TCA9548A multiplexer with two or more identical I2C sensors (like the BME280) on one Arduino Uno.

[@hrhodes2768]

thank you, I needed to find a method of 1 wire communication on Arduino

[@blackbox330]

Sir, Great video

[@BluCasper]

wow. amazing. the best video on i2C. sir please make a video on SPI. waiting for your new videos

[@LtShifty]

Thanks so much for this video, ots exactly what i wanted to learn. Im looking to build a home cockpit and one of my requirements is to use a single USB (or a max of 3) for the entire thing. This looks perfect to wire up all of thr switches and controls on micro pros and then run them all from just one or two masters. The coding for this is remarkably simple as well.

[@mtalhakhalid1679]

Best videos ever sir keep that awosm work❣💓

[@gustavovd]

What a beauty! Magical!

[@markuswerner1166]

thank you for this vid. Merry xmas

[@Kingzila2]

Excellent video! Thank you so much for making this tutorial, it really helped me!

[@leeaudio027]

Awesome, thanks for sharing!!!!

[@ezangrobotsvideos9286]

Thanks , great info

[@flashcorp76]

Excellent tuto !

[@hadireg]

Great teaching skills & content quality! 👍👍 jus a tiny detail: NXP, Philips has a single L... Thank you sir!

[@jonathanchan2067]

Very good video very good explanation

[@jjjxxxaime]

Excelent and very useful tanks a lot

[@waterhouse8465]

I love this guy

[@turanyasar3375]

Ur literally a legend.