Shield or the Standalone.
They both have a 1watt 60ohm resistor across the High and Low. But that's it.
The standalone, it's R14, the SMD component bridging the 2 traces connected to 1 / 9 on the pinout.
The shield, it's R6, the gigantic resistor next to the pinouts.
I found it necessary to make canbus communication work.
If you're looking to setup some canbus communication, you need to brush up on the can library.
void read_can_data(unsigned long id, byte length) {
if (CAN1.msgAvailable() == true) {
CAN1.read(&id, &length, can_data);
// 419,415,298 = 0x18FFC502 is turbo output
// 419,367,426 = 0x18FF0A02 is no idea
can_id = id;
if (can_id == 419415298) {
can_timeout = 0;
memcpy(turbo_flags, can_data, 8);
turbo_position = (turbo_flags[2] << 8) + turbo_flags[1];
turbo_temp = turbo_flags[3];
turbo_cmd_position = (turbo_flags[6] << 8) + turbo_flags[5];
turbo_feedback = (turbo_flags[7] / 127.0) * 100;
} else {
timeout_can();
}
} else {
timeout_can();
}
}
It listens to the entire canbus network it is connected to. Technically you could connect it to your vehicles bus and spy on stuff.