This movie is a demo of the Arduino CAN-Bus shield. It is connected to a car via the OBDII port. The demo give a real time reading of RPM, road speed, engine temperature and throttle position. It uses the Microchip MCP2515 CAN controller with MCP2551 transceiver.
CAN-Bus Shield info:
https://skpang.co.uk/catalog/arduino-canbus-shield-with-usd-card-holder-p-706.html
There is a new version of the sketch at:
https://github.com/skpang/Arduino_CAN-Bus_ECU_reader
Post time: Sep-09-2017