View this project on CADLAB.io.
WURacing Electronics Team Spring 2016
The purpose of this code is to read packets coming from our AEM Infinity ECU over the AEMNet protocol and write it over XBee to a computer.
Hardware-wise, we are using an Arduino UNO, the SparkFun CAN-Bus Shield, a pair of XBee radios, and a custom-made dashboard. The dashboard contains a bunch of LEDs for our RPM display, an OLED for whatever you want (we are using it to display the numeric RPM), and a check engine light. We are also using a custom connector that takes the four wires from the AEMNet connector and maps them to a DB9 connector to connect to our CAN-Bus Shield.
Be aware that to read the XBee stream, we wrote our own reader on the computer side which displays our data in real-time and writes it to a CSV. Because our ECU writes data over in packets, we left most of the sorting to our Python application, which reads the data in and organizes it before saving it.
We have updated the code to store a backup of the data to an SD card in case the stream is disrupted. This requires no extra hardware because the SparkFun CAN-Bus Shield has a built-in Micro-SD card reader.
UPDATE 4/29/16: The SD card support has been deprecated due to hardware restrictions and lack of necessity.
UPDATE 5/3/16: After burning out our large display, we have rewritten the display code to use a smaller display which cycles through displaying a few different values with the use of a button.
Many of the libraries have been adapted to work with AEMNet, which varies slightly from the CAN-Bus standard.