CAN Bus Shield with Arduino Uno

Other Miscellaneous
1

Hello,

I am using the CAN bus shield (https://www.sparkfun.com/products/13262) with an Arduino Uno and am running the CAN_Write_Demo found here https://github.com/sparkfun/SparkFun_CA … r/examples. I have already downloaded all the libraries being used it this code and no errors are being thrown when the code is uploaded, but there is not message being transmitted on the CAN high/low outputs. Can someone give me an idea of how to send a CAN message on this shield?

2

CAN requires termination resistors on the bus and it sounds like whatever device you’re trying to write too doesn’t have those. Try adding a 120 ohm resistor across CAN_H and CAN_L and see if that gets things working for you.

3

Thank you Chris. Adding the resistor solved my problem.