CAN Bus Sketch

I’m using the SPARKFUN CAN BUS shield with an arduino Uno and a sketch that I got from Instructables (https://www.instructables.com/id/CAN-Bu … h-Arduino/) The sketch seems to work fine as long as I don’t try and filter the data, when I uncomment the filter I get no data at all. The Libraries I’m using are the ones from the link to sparkfun on the Instructables page, so I think the libraries should be Ok.

#include <Canbus.h> // don’t forget to include these

#include <defaults.h>

#include <global.h>

#include <mcp2515.h>

#include <mcp2515_defs.h>

void setup()

{

Serial.begin(9600);

//Initialise MCP2515 CAN controller at the specified speed

if(Canbus.init(CANSPEED_500))

Serial.println(“CAN Init ok”);

else

Serial.println(“Can’t Init CAN”);

delay(1000);

}

void loop()

{

tCAN message;

if (mcp2515_check_message())

{

if (mcp2515_get_message(&message))

{

if(message.id == 0x631 and message data[2] == 0xFF) //filtering based on CAN bus message ID. //I have tried filtering on just the message ID, but that doesn’t help either
{

Serial.print("ID: ");

Serial.print(message.id,HEX);

Serial.print(", ");

Serial.print("Data: ");

for(int i=0;i<message.header.length;i++)

{

Serial.print(message.data*,HEX);*
Serial.print(" ");
}
Serial.println(“”);
}}}
}