What I am trying to do is read a CAN message from the ECU of a car (Motec M400 ECU) and I would like to print parts of this CAN message to a serial LCD screen.
The first step is to make the CAN shield run on 1000kbps because this is the speed the ECU runs with. I will use the CAN_BUS_SHIELD code to try and receive data on the BUS.
The hard part is going to be printing this message to a serial LCD. I looked at the CANBUS_SHIELD_OBD_RECIPLE code but the problem is that this code uses OBD PIDs to obtain information, my ECU does not have OBD.
I know the exact address of the CAN message (I can set it in the ECU software). What I need is some code that can read the message at this address and then print it to a serial LCD.
Right now I am using your “receive” example and I am getting some data but I am not too sure what I am looking at. I thought the CAN message would be much longer? Also, I am only getting one or two lines, when I restart the arduino I get different values every time. Here is what I am getting:
CAN_BUS GET DATA!
data len = 8
0 0 0 0 1 3 20 91
CAN_BUS GET DATA!
data len = 8
0 0 0 0 0 0 5 59
CAN_BUS GET DATA!
data len = 8
0 68 121 110 111 100 111 99
CAN_BUS GET DATA!
data len = 8
19 68 19 64 2 16 0 0
CAN_BUS GET DATA!
data len = 8
0 0 0 0 0 0 5 60
CAN_BUS GET DATA!
data len = 8
19 64 19 60 2 16 0 0
CAN_BUS GET DATA!
data len = 8
19 72 19 68 2 16 0 0
CAN_BUS GET DATA!
data len = 8
5 34 1 137 0 0 0 0
CAN_BUS GET DATA!
data len = 8
0 0 0 0 0 0 0 0
CAN_BUS GET DATA!
data len = 8
0 0 0 0 0 0 5 60
CAN_BUS GET DATA!
data len = 8
3 179 0 0 0 0 1 244
How do I tell which adress this is coming from, which part of this is the data?
Did you make any further progress? I have the same problem where I get 3-4 lines and then nothing until I reset the arduino or restart the serial monitor.
