2008 GM truck GMLAN

[garnerm]

Ok so I know this isn't the normal heres my dump... PLZ BRO. I am playing with an Uno v3/MCP2515 module. I am noob when it comes to GMLan or Can-BUS. So far I got it to where I am reading it and I also think I have it sending. I am running at 33K3bts. I've been looking at the GMLAN_bible but I am just not sure exactly what I am looking at or looking for. So I am going to post the code. can someone please put a can message that will do something like set fuel level, RPM, MPH or Temp. I just want to make sure its sending correctly before really get down this rabbit hole. So instead of dump plz bro Im going to GMLAN plz bro .

#include <SPI.h>#include <mcp2515.h>


struct can_frame canMsg1;
struct can_frame canMsg2;
MCP2515 mcp2515(10);




void setup() {


  canMsg1.can_id  = 0x0F6;
  canMsg1.can_dlc = 8;
  canMsg1.data[0] = 0x8E;
  canMsg1.data[1] = 0x87;
  canMsg1.data[2] = 0x32;
  canMsg1.data[3] = 0xFA;
  canMsg1.data[4] = 0x26;
  canMsg1.data[5] = 0x8E;
  canMsg1.data[6] = 0xBE;
  canMsg1.data[7] = 0x86;


  canMsg2.can_id  = 0x036;
  canMsg2.can_dlc = 8;
  canMsg2.data[0] = 0x0E;
  canMsg2.data[1] = 0x00;
  canMsg2.data[2] = 0x00;
  canMsg2.data[3] = 0x08;
  canMsg2.data[4] = 0x01;
  canMsg2.data[5] = 0x00;
  canMsg2.data[6] = 0x00;
  canMsg2.data[7] = 0xA0;
  
  while (!Serial);
  Serial.begin(115200);
  SPI.begin();
  
  mcp2515.reset();
  mcp2515.setBitrate(CAN_33KBPS, MCP_8MHZ);
  mcp2515.setNormalMode();
  
  Serial.println("Example: Write to CAN");
}


void loop() {
  
  mcp2515.sendMessage(&canMsg1);
  mcp2515.sendMessage(&canMsg2);


  Serial.println("Messages sent");
  
  delay(1000);


}

Thanks in advance. I just want to prove to myself that this will work before I start my whole project. I want to make in the end something with a couple pots that will let you sweep gauges. I started with the 2007.5+ since its gm lan and easier to find data on instead of GM class 2. I also want to do one for the 03-07 later but one project at a time.

[clusters]

A lot of work for something you can do with any uplevel scantool, like Launch or Autel, even on the bench.

I do it all the time with my Autel MS906BT to test 2003-2007 clusters on the bench.

[garnerm]

I know. Its really just something I wanted to do to learn more about Can-bus and arduino's. I also might skip the Pots and just have it go one at a time sweeping them.

[garnerm]

I haven't messed with it in almost a month but I am trying to pick back up.

So I tried this thinking it would give some engine RPM & vehicle speed to the cluster but success

  canMsg1.can_id  = 0x28;
  canMsg1.can_dlc = 8;
  canMsg1.data[0] = 0x00;
  canMsg1.data[1] = 0x01;
  canMsg1.data[2] = 0x2c;
  canMsg1.data[3] = 0x03;
  canMsg1.data[4] = 0xA9;
  canMsg1.data[5] = 0x00;
  canMsg1.data[6] = 0x00;
  canMsg1.data[7] = 0x00;

BTW I do know it is sending at least when I run it at any bitrate that the Cantact supports. If cantact supported 33.33kbps I would use it for this project instead of the ardiuno. I wish I had a 2007NBS to data log on. any suggestions on some msgs to send to the cluster.