AutoCAN_SensorHub

Automotive sensor hub using Arduino. Simplifies wiring and communication when adding multiple aftermarket sensors to a vehicle. Outputs data to the CAN bus to be used by the ECU or other microcontrollers, and analog outputs to be used by traditional gauges.

Development Hardware
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• Arduino-compatible AST-CAN485 Dev Board
• DC buck converter to supply all hardware with 5v power
• VR Conditioner Board for handling VSS pulses
• DAC for analog output (only outputting AFR at this point)
• 3 axis accelerometer with compass (I2C communication)
• GPS module (I2C communication)
• Temperature sensor using 1-wire communication protocol
• Adafruit Bluefruit LE SPI Friend for wireless production debugging
• Optoisolators to take 12v inputs
• Electric cabin heater - VW/Audi part number 1K0 963 235 F

Inputs
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• Fuel pressure (Honeywell MLH100PGB06A sensor)
• VSS (Ford 8k pulse/mile sensor)
• CAN ECU data (from MegaSquirt)
• Triple axis accelerometer
• GPS
• Compass
• Reverse trigger wire from transmission
• Ambient temperature sensor

Outputs
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• Fuel pressure on CAN bus
• VSS on CAN bus
• Trip odometer on CAN bus
• Reverse indicator on CAN bus
• Analog AFR signal
• Accelerometer data on CAN bus
• GPS coordinates, time, date on CAN bus
• Compass heading (degrees) and text representation (“NW”, etc.) on CAN bus
• Ambient outdoor temperature
• 3x cabin heater relay signals