How I2C Communication Works and How To Use It with Arduino

[@thesauceboss5995]

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.

[@vijaykumar-hc6jz]

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

[@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...

[@kiranbs5057]

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 .

[@elonmuskmtmt886]

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

[@HowToMechatronics]

Thank you!

[@BatsAwesomeIn2030]

To the point, simple and clear, well done! which most people struggle to explain. ~This is coming from a Professional Embedded engineer.

[@HowToMechatronics]

Glad to hear it, thanks!

[@nobodyspecial313]

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!

[@iancorcoran7560]

Dejan Nedelkovski

[@Gupatik]

it's been 8 years now or so, are you still alive bud, and did you learn this arduino and microcontrollers stuff. Anyways, hope you are doing good

[@michaelvogt7787]

Dejan, I was looking through youtube for a decent tutorial about the I2C bus as implemented on the Arduino. I have a class of high school students who could use a good demo. I didnt expect to find your EXCELLENT tutorial, one that would be useful even to professional electronics engineers. I wanted to let you know you did a nice job, and it was appreciated. Dr. Michael Vogt - North American Robotics

[@LaurinusPonpon]

I watched a few videos and this is the BEST explanation for I2C. Thanks

[@HowToMechatronics]

Glad it was helpful!

[@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.

[@HowToMechatronics]

I hope you enjoyed this video and learned something new! If you'd like to support me making more content like this, please consider supporting me on Patreon: www.patreon.com/howtomechatronics

[@Scudmaster11]

I know you can get composite video out of it or something

[@mark879]

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

[@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!!!

[@HowToMechatronics]

Glad to hear it, cheers!

[@simplynilsw]

You said 124 devices instead of 1024 devices (0:52 min), but great video it helped me alot, thanks :))

[@sorenium]

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

[@Patrick-ky7ez]

Amazing video. SOO many hours of reading pdfs with unnecessary tech jargon. You explained it perfectly.

[@michaelliles6755]

Finally someone who knows what he's talking about ! Thank you! Not one person on the Arduino site or any other place online have suggested hooking up scl to scl and sda to sda . Everyone says hook it up to A4 and A5 . I bought two units so far thinking that either I broke it or it was doa. well turns out that both work fine. why is this info missing from the arduino site?? anyway thank you very much!

[@AliHSyed]

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

[@kamuizero]

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

[@erniea5843]

this video is still providing value after all these years!

[@HowToMechatronics]

Happy to hear it!

[@ngkhai5935]

There is an error at the circuit diagram. Instead of 5V you're connected to a GND. However, thank you so much, I learnt a lot from your wonderful video. Merry Christmas

[@tarunrjain9748]

Macha, I am a big fan of your channel. Macha I think u did a mistake .......in the tinkercad sample which u have shown in the video .....both the power supply are connected to ground.......Shouldn't the VCC one connect to 5v power supply? btw lots of luv from India ❣

[@maxpolaris99]

Your examples are very helpful for us slow pokes with little to no insight. Good Job.

[@danielrufenacht3722]

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

[@markconger8049]

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.

[@alexpelagaggi]

Dejan Nedelkovski, you are the best. Thank you very much for making this video.

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

[@aubreydebliquy8051]

Thank you for a clear explanation. I used only SPI to date but now I know how to use I2C ... thanks...

[@alterguy4327]

This channel never gets old

[@MkmeOrg]

This is fantastic! Sharing on Mondays live show. Great vid. Cheers!

[@roidroid]

6:00 just a headsup: You have the Arduino connected to two GNDs, with no 5V line.

[@AdityakrishnaMr]

Yes, that bothered me too.

[@AngryRamboShow]

@Blondie SL the white race needs you to make blond haired blue eyed babies. Stop being a degenerate and man up.

[@taimooramin1272]

Bro thats not a big deal he is also a human and if he has done any mistake that does not matter because if you have used arduino or any other types of microcontroller in past u can correct the connections easily

[@ksawery6568]

@Blondie SL Well that escalated quickly.

[@cinibar]

@Blondie SL Dark matter....hmmmm I once cut open a dead flashlight battery and found it to be very dark, black as coal in fact. I just figure it got full of the dark that it was displacing with light, and died when it got full. :)

[@icarossavvides2641]

There are a lot of Tubes about I2C but none of them make note of the fact that I2C is an abbreviation of Inter IC Communication, it was invented by Philips to help reduce the amount of communication tracking between IC's on a PCB, consequently it is a reliable communication system when used over short distances in a controlled environment, a PCB, but it was never intended to be sent overlong pieces of wiring (>200mm?). If you use this to connect to devices over long lengths of wire, especially if there are noisy items around like motors etc, be prepared for random communication problems.

[@mohanmanoharan1387]

super, really appreciate for the tutorial. Request similar other Serial protocols SPI explanation. CAN, UART. thanks

[@omaralharran]

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

[@jackm416]

Great job of explanation ! Good graphics and clear explanation of the timing !

[@HowToMechatronics]

Thank you!

[@fleshTH]

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

[@SathishKumarbalu]

Nice ! Now i got a clear idea what is I2C.

[@chinhcd]

It saved me so much time and hassle. Good job!

[@soniyachandran629]

Thank you for that simplified explanation :)

[@HowToMechatronics]

Glad it was helpful!

[@morgard211]

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

[@MrJeppeholt]

OMG dude that was perfect. I have been struggeling with i2c for a while now but this made it click. THANKS! :D

[@danielmarques7279]

Great video, really appreciate it! But I really think that explaining every line of the code would've been great!

[@EmciGad]

Very good and clear explanations! well done!

[@suzesiviter6083]

To clarify; the I2C lines are either high impedance or 0, you never drive the bus line high directly; that is achieved by de-asserting the '0' and letting the internal pull up resistors tie it to Vcc. The high impedance or low state on the bus prevents bus contention; that is a ground connecting to Vcc directly causing a short between any masters or slaves.

[@naboulsikhalid7763]

Hi, Mentor. What to say, thank you won't be enough. great, detailed video.

[@reydus6651]

superb video mate. Explained it very easily.

[@miguelluisrodrigues3704]

Thank you brother, you help me a lot in my projects

[@mitkopetrovik259]

Nice, it is desirable in the following tutorials to explain the I2S protocol and what is exactly the difference with I2C

[@Syria..]

amazingggggg you did save me after reading datasheet for days

[@totalnewbie8619]

This was an informative and helpful video. I also liked how you explained with graphics. It made things easier to understand.Thank you and please keep doing more videos like this for beginners like me. Best regards.

[@HowToMechatronics]

Thanks, I'm glad to hear that!

[@templocal]

You explain things very accurately! Thank you!

[@schlo9358]

Thanks for your example with the wire libary

[@henearkrip]

Nice Work! Very clear and simple explanation!!

[@erichertsens]

thanks, appreciated from the Dominican Republic

[@skeeveskeeve]

Best video I have seen on the subject.

[@stevetobias4890]

Excellent explanation. Also helps me in a project where I will be using breakout boards for the first time. Thank you

[@youseebruce5426]

A very clean and neat explanation... I understood clearly... Thank you very much.

[@excite236]

saved me so much time working gy-80 thanks man

[@PhDFernandoCoach]

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

[@iiDougieii]

Thank you for this video. I needed a refresh of what I already learnt in the past. Good work !!

[@HowToMechatronics]

Thanks!

[@cmulder007]

In the breadboard diagram at 5:56 both the + and - are connected to ground on the Arduino

[@ipadize]

i know its an old video and you probably already know that but you can shorten the Serial.print commands to one like this: Serial.print(String("X0= ") + (X0) + ("X1= ") + (X1)); then when the numbers are bigger or shorter it will automatically fit them together

[@pietrotosoratti799]

Thank you for this useful video !! You explained the topic in such a clear way !!

[@BBRR442]

best tutorial on youtube thanks

[@HowToMechatronics]

Thanks!

[@ExtantFrodo2]

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

[@dorianmccarthy7602]

Intro RIP headphones users. But great info :)

[@matthewmorrison2071]

yep I almost died I swear

[@JohnnyFaber]

Same.

[@Gereon_]

Very good explanation! Thank you very much.

[@chasenjohnson797]

Great description of I2C. Thanks:)

[@ronimine]

Very clear and instructive. Well done. Thank you !

[@expectropetronus]

Simple and lucid explanation... Thank you

[@victorchan8685]

Appreciate for your excellent video, you speak very clear and explain in detail! You are wonderful! Help a lot!

[@spbains1966]

Excellent tutorial bringing out the details very clearly

[@minanovkiril]

дејан секоја чест! браво за споделеното знаење! сеа дознав за твојот канал, ќе разгледам што си споделил со задоволство.

[@BigyanChap]

I2C Communication -- Demystified! Thumbs up.

[@leuc2475]

Thank you. It's simple to comprehend

[@lan5053]

So easy to understand. Thank you!

[@collenfisher3635]

Brilliant, and exceptional narration.

[@степаалександров-с5р]

your English is perfect!

[@ЮжныйКот-м2э]

Что то мне мерещится русский акцент у автора.

[@moussafiradil1700]

absolutely brilliant @

[@jokopribadi6462]

easier to understand in this video. Thanks

[@PiCoVienna]

Excellent, easy to understand, very precise!

[@astudyspace7272]

Thank you very much for this detailed explanation. You made this topic easy to absorb. 🐣

[@J-K-AG]

Great tutorial mate. Just wondering is there any tutorial on how to change address on unique slave devices.

[@J-K-AG]

No problem. Thanks for the video anyway really helpful.

[@rajsudhirsaran312]

Very clear explanation

[@KunalGautam]

Thanks, it helped me a lot to understand how I2C works.

[@warsini5386]

Wayagkulot

[@rahazandifar5596]

Thanks for this concise refresher video

[@krozareq]

Good to know how all this works. I've used the Linux i2c and SMbus userspace tools, but never really knew the hardware functionality behind it. GPU lighting is generally i2c and motherboard controllers use SMbus (both very similar though). Knew just enough to be dangerous and change RGB colors or monitor temps with a very light shell script and even shell functions. The OpenRGB project has the addresses for most hardware, including USB (mouse, keyboards, and some mobos use USB for communication to controllers).

[@121yahya]

very nice video, clear explanation and easy to understand

[@iurifrederico8608]

Nice! Very good explanation! Well done 👍

[@ASerenidadeEstoica]

Nice explanation... the protocol I2c is very usefull, fast and need... Thank's for your time and information.

[@EdisonEBustos]

Very clear explanation. Thanks!

[@druggles1]

Nice presentation along with a great explanation. Thank you, for sharing, Dejan!!

[@alextrujillo8861]

In the circuit diagram at 6:00, I notice GND is connected to the red and blue rail. Is this accurate or am I missing something? I thought I2C was active low? Was this a mistake in the wiring diagram?

[@akshayn6472]

thanks.very well explained

[@HowToMechatronics]

Glad it was helpful!

[@glikar1]

Thanks, very good in depth tutorial!

[@laurentmenten4644]

At 5:47, I noticed a small mistake in the wiring, both the VCC and GND on the breadboard are connected to a GND pin on the Arduino ... Anyway, great explanation ;)

[@ΝικόλαοςΜελάς-π2γ]

Good explanation of the protocols' packet. thanks

[@mikelemon5109]

Awesome tutorial thanks a lot where have you been where I didn't understand that communication at all.

[@sandrosalessales6324]

Very good video !!! Thanks

[@tahiriqbal8543]

very good and deep explanation of I2c thanks Brother