CAN Protocol Explained | Controller Area Network

In this video, I cover the basic theory of CAN communication. Enjoy!

Further reading

[nourabdennebi]

The way you properly explained it. Thank you so much, finally I could understand the protocols and what they do. I already had them from distributed system, but could never wrap my head on what do they do. Please keep posting videos!

[AkashPatil-wojh]

Very helpful sir !! Got a brief about CAN, now I can start in depth study

[arthurfricchione]

Josh your videos are excellent . Most videos just talk about twisted wires and terminating resistors . I personally enjoy learning how and why everything is communicating then build models of the circuiting to physically understand what is happening and how signals are produced. As you can tell I’m new at all this terminology but I will learn and understand what is going on. Thanks for sharing your knowledge. Artie 👍

[devadasanvarier]

Very good explanation. I am working as an ETO onboard Tanker ship. Main engine is utilising full electronic control using CANBUS protocol. It was difficult me to understand this concept. After watching your video, made it very clear how the CANBUS signal communicating and how it is transmitted over the bus. Thank you 😊

[SupremelyFly]

Good video. I like how you presented the information in a traditional manner using slides supported with a solid verbal explanation. Made it easy to take notes and follow.

[DominikBelca]

Nicely explained, even for me, not an EV Engineer but CS Guy :-)

[thirumeniparthiban]

Nice, @4:01 better to say each CAN message has its message ID, the CAN node itself does not have any ID.

[lukeshbramhapurikar]

Please make a video from message id i.e. in decimal to can frame
Thanks for the video, it helps me lot to understand the sequence bit by bit.

[moisesaladro]

It believe you're talking about j1939, because CAN specification doesn't have physical layer, which is basically the signal interpretation and the arrangement of wires in twisted pairs.

[Patricia-ePatricia___a]

The science of a smile and its impact on you.

[farizrahman]

Thank you so much for the simple explanation

[nlsn]

200th subscriber here. Keep going. The vids are good

[habtamusium]

I hv got informative knlg ! many thanks .

[RCagataySahin]

Thank you for the clear explanation. I am really interested in these stuff. My background is mostly on mechanical engineering, and I wonder if learning communication protocols would be so useful for my career as well. Could you tell me how deep I should go into the topic to use it in my future?

[yasirshahzad]

Here you have said that the node with a lower ID will win the orbitation race. Can you explain how the clock and data of multiple nodes are synchronized? They do not affect each other; the clock and data remain independent.

[fcintaretu]

Hi, thank you for the nice introduction. In my understanding, one CAN node can transmits multiple meassages with different IDs. In this context, the ID relates to a meassage, not to a node. Is my understanding correct?

[nigeldsa]

Not all applications of can bus have a master but some oem do have a master controller for transmitting and receiving the can data. Just like can open

[gg-gnre]

Used all over solar too. inverters / batteries / charge controllers etc

[hasankmr]

I have a question about can cominucation on car. As I searched on internet, Can2.0a and Can2.0b can coexist same bus line. Can an EVCU recieve messages from bus without any problem? Or is it possible that? An example EVCU, motor, and battery nodes connected same bus. Motor has Can2.0a and battery has Can2.0b. Can a standart EVCU' s work this situation?

[rajvirgrewal]

Hi, as you said there is no master controller on the can bus then isn’t there a CAN module that controls or links all different controllers on the bus and turns them on and off by using differ voltages thru the CAN hi and can low twisted wire pair, for example I want to move the right window up, window switch will send the some voltage to CAN module which then will send let’s say 2v in HI and 1.7v in LOW to the right window node/ ECU moving the glass up? Sorry my knowledge of CAN communication is quite low.