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!
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 👍
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.
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 😊
Great point & a very helpful comment... Was wondering how “nodes an have ID” vs “messages” from a node having an ID… Things make much more sense now regarding how the communication works…
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?
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.
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?
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.
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.
Each CAN node runs its own control algorithm. This algorithm might depend on CAN input from other controllers, if that's what you're asking. The control algorithm might also depend on other types of inputs, such as GPIO, SPI, UART. The window switch probably interfaces to a low voltage CAN controller through a hardware connection, if I had to guess. Not everything needs to be CAN ;)
Hello and thanks for CanBus tutorial. I used Arduino Mega with MCP2515 shield reading 7 CanOpen sensor information. Got 4 more sensors added to the work project. Unfortunately it did not work. Upon further investigation, I found out the new sensors are fault tolerant low speed can devices. I could not find any low speed Can shield on line to try with these sensors. Any idea besides changing the transceiver IC? Thanks.
@@EV_engineer , thanks for the reply. I do know that the transceiver voltage and termination resistor is different. I have a low speed fault tolerant sensor that I can not read data from but I can read data from other high speed sensors. I was simply asking if you know a shield, or mod or hack that I can do to read low speed sensors. One solution I thought of is using mcp2515 with TAJ1050 and replacing the transceiver with low speed type compatible with 2515 controller. thanks again for the reply. If I manage to make it work, I let you know.
@@simaroaerial7237 HELLO, I hope you are doing fine, my project is also related to CAN i was hoping if we can have discussion a bit if possible? I am final year electrical engineering student.
@@Yurihjjjn , I can help you to some degree. I can not share code for our sensors but I can share a store bought sensor that we used to develop the system. The difference between the two are 16 bit integer for the store bought device and our sensors that are 32 bit real number. The front end, meaning fetching the data either two bytes or 16 bites are the same. Back end process of the bit stream is different.
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?
Hi, here are some details about a mixed CAN network, Receiving Messages: A CAN 2.0B node can receive messages from CAN 2.0A nodes without any issue because of its backward compatibility. Sending Messages: If a CAN 2.0B node sends a message with an 11-bit identifier, a CAN 2.0A node can receive and understand it. However, if the CAN 2.0B node sends a message using a 29-bit identifier, the CAN 2.0A node will not be able to interpret it.
The CAN protocol does not use LVDS (Low-Voltage Differential Signaling) for its communication. While both CAN and LVDS use differential signaling for improved noise immunity, they are different technologies with different purposes and specifications.
hey, really nice explanation i have a project on ECU scanners going on and i have to understand how the work and fetch codes and everything so can you help me in that ?
Sometimes two people in a single conversation will start speaking at exactly the same time. CAN nodes are, in that regard, no different, so the arbitration process decides which one gets to talk first.
in the video he says 0 overpowers 1, so 1 means that transmission is stopped, this seems counterintuitive to my knowledge of bits (1s and 0s) 0 being OFF and 1 Being ON @@wildgurgs3614
I'm interested in playing with CAN, but most of the open-source software I've seen use Linux/SocketCAN. Any idea if CAN hardware (Ixxat USB-to-CAN V2, Peak PCAN-USB, etc) will work on a Linux VM running inside of a Windows Host?
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!
Glad it helped!
Very helpful sir !! Got a brief about CAN , now I can start in depth study
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 👍
Glad you are finding them helpful!
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.
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 😊
I'm here for the very same reason.
~ETO onboard LNG Tanker
Nicely explained, even for me, not an EV Engineer but CS Guy :-)
So clear and consise . Up to the mark
Thank you so much for the simple explanation
Nice, @4:01 better to say each CAN message has its message ID, the CAN node itself does not have any ID.
Great point & a very helpful comment... Was wondering how “nodes an have ID” vs “messages” from a node having an ID…
Things make much more sense now regarding how the communication works…
200th subscriber here. Keep going. The vids are good
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.
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?
Excellent and informative
CAN BUS ua-cam.com/video/EsKpbdRWXZM/v-deo.html
I hv got informative knlg ! many thanks .
The science of a smile and its impact on you.
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.
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?
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.
I have been looking for that information for a while myself
Good sharing
Great tutorial. Thanks !
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
well explained thank you
awesome explination!
Used all over solar too. inverters / batteries / charge controllers etc
This was a great explanation.
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.
Each CAN node runs its own control algorithm. This algorithm might depend on CAN input from other controllers, if that's what you're asking. The control algorithm might also depend on other types of inputs, such as GPIO, SPI, UART. The window switch probably interfaces to a low voltage CAN controller through a hardware connection, if I had to guess. Not everything needs to be CAN ;)
Hello and thanks for CanBus tutorial. I used Arduino Mega with MCP2515 shield reading 7 CanOpen sensor information. Got 4 more sensors added to the work project. Unfortunately it did not work. Upon further investigation, I found out the new sensors are fault tolerant low speed can devices. I could not find any low speed Can shield on line to try with these sensors. Any idea besides changing the transceiver IC? Thanks.
Low speed fault tolerant CAN transceivers use completely different voltage levels, I would recommend using normal ones
@@EV_engineer , thanks for the reply. I do know that the transceiver voltage and termination resistor is different. I have a low speed fault tolerant sensor that I can not read data from but I can read data from other high speed sensors. I was simply asking if you know a shield, or mod or hack that I can do to read low speed sensors. One solution I thought of is using mcp2515 with TAJ1050 and replacing the transceiver with low speed type compatible with 2515 controller.
thanks again for the reply. If I manage to make it work, I let you know.
@@simaroaerial7237 HELLO, I hope you are doing fine, my project is also related to CAN i was hoping if we can have discussion a bit if possible? I am final year electrical engineering student.
@@Yurihjjjn ,
I can help you to some degree. I can not share code for our sensors but I can share a store bought sensor that we used to develop the system. The difference between the two are 16 bit integer for the store bought device and our sensors that are 32 bit real number. The front end, meaning fetching the data either two bytes or 16 bites are the same. Back end process of the bit stream is different.
Amayzzing video bruv
CAN BUS ua-cam.com/video/EsKpbdRWXZM/v-deo.html
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?
Hi, here are some details about a mixed CAN network,
Receiving Messages: A CAN 2.0B node can receive messages from CAN 2.0A nodes without any issue because of its backward compatibility.
Sending Messages: If a CAN 2.0B node sends a message with an 11-bit identifier, a CAN 2.0A node can receive and understand it. However, if the CAN 2.0B node sends a message using a 29-bit identifier, the CAN 2.0A node will not be able to interpret it.
Thank you
Nice Video..Keep it up..
CAN BUS ua-cam.com/video/EsKpbdRWXZM/v-deo.html
I like it.
good
Is the can H and can L sending a signal called LVDS ?
The CAN protocol does not use LVDS (Low-Voltage Differential Signaling) for its communication. While both CAN and LVDS use differential signaling for improved noise immunity, they are different technologies with different purposes and specifications.
hey, really nice explanation i have a project on ECU scanners going on and i have to understand how the work and fetch codes and everything so can you help me in that ?
Hi! Sounds like a tough project. I also want to learn about ECU scanners, stay tuned and I might make a video on this topic
@@EV_engineeryes, its my final year project from an internship and the company wants to manufacture scanner so a detailed video would really help.😃
Do all the nodes need to have a common ground?
Yea
Part two please
New subscriber!
3:43 why would they start to transmit at exactly the same time??
Sometimes two people in a single conversation will start speaking at exactly the same time. CAN nodes are, in that regard, no different, so the arbitration process decides which one gets to talk first.
in the video he says 0 overpowers 1, so 1 means that transmission is stopped, this seems counterintuitive to my knowledge of bits (1s and 0s) 0 being OFF and 1 Being ON @@wildgurgs3614
Pessimistic, but here are the details and anticipated actions for refunds
Thank you
Awesome! Thanks.
CAN BUS ua-cam.com/video/EsKpbdRWXZM/v-deo.html
I'm interested in playing with CAN, but most of the open-source software I've seen use Linux/SocketCAN.
Any idea if CAN hardware (Ixxat USB-to-CAN V2, Peak PCAN-USB, etc) will work on a Linux VM running inside of a Windows Host?