CAN-BUS Shield V2.0: Problem with sending

Products & Technology Shields
#1

Hello everyone. I am new in this forum and in using Arduino with CAN-BUS Shield.

In my project I want to analyse the from the Shield sended CAN messages with the CANcaseXL from Vector.

I have got the message: “CAN BUS Shield init okay!” . But I don’t receive anything on the CANcaseXL side.

I have connect it to the CAN-Shield in four ways:

  1. With Sub-D9 without an external resistor between CAN_H and CAN_L
  2. With Sub-D9 with an external resistor CAN_H and CAN_L
  3. With “CAN_H-CAN_L” Port without external resistor CAN_H and CAN_L
  4. With “CAN_H-CAN_L” Port with external resistor CAN_H and CAN_L

So I don’t know exactly if there is an internal resistor between CAN_H and CAN_L in the CAN-Shield

On the side of the CANcaseXL I tried it with and without resistor, too.

It seems like that the CAN-Shield can’t send messages, because for the first messages I have got a “SENDMSGTIMEOUT” and later I have got a “GETTXBFTIMEOUT” while sending.

I hope someone can help me. Thanks in advance.

How using 9 pin D-Sub at CAN-BUS Shield?
#2
  1. IMG_20200428_152809__01
    IMG_20200428_152809__014640×3480 3.08 MB
#3
  1. IMG_20200428_152835__01
    IMG_20200428_152835__014640×3480 2.96 MB
#4

3.

IMG_20200429_104544
IMG_20200429_1045444640×3480 3.46 MB

#5
  1. IMG_20200429_104525__01
    IMG_20200429_104525__014636×3480 3.73 MB
#6

We haven’t used and tested CANcaseXL, what is it for? @Lenn00

#7

It is for analysing the CAN-Bus. So that you can see the sended messages.

On CANcaseXL side I got messages when sending from channel1 to channel2 of the CANcaseXL. So it seems that the fault is on the side of the CAN-Shield.

I only connect them like in the pictures and have used the normal sending example of the library.

So is there maybe something more to consider at CAN-Shield which I forgot?

#8

I have done a new test. Like said I can send messages between channel1 and channel2 of the CANcaseXL. If I connect the CAN-Shield to this bus, I have got a Bit Error and the sending stops.

Also I measured only 1,2 Ohm between CAN_H and CAN_L of the CAN-Shield. Is this normal?

#9

Hi Lenn00,

do you have fixed the problem.
I have a similar setup with CANCaseXL - and it works partly.
I do receive messages in the CANoe but I can’t read messages sended by the CANCaseXL in CANBUS shield.

Best regards
Max

#10

Hi Max,

for me the problem was, that I’ve got a broken CAN-BUS-Shield from my organization. So after buying a new one, it worked well.

So my setup which you can see here was okay.

Sorry that I can’t help you better.

Best regards
Lenn00

#11

Hi Lenn00,

thank you!

Best regards
Max