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GMLAN Sniffer¶
Introduction¶
This project makes use of CAN on an LPC1768 to communicate with General Motors GMLAN network via a compatible transceiver. GMLAN is a single wire CAN Bus that operates at 33.333 kbit with 29-bit header packets and is commonly used for transmission of non-critical information between such nodes on automobiles as the following;
- Dash cluster
- Entertainment system (head unit)
- Satellite Navigation (OnStar for example)
- HVAC controls
- Immobiliser / alarm / other security systems
- Door locks and door status
- Power Windows
- Interior / exterior lighting
- Reversing sensors
The list is extensive, for a better idea of what can be done, view the ARBIDs tab on the GMLAN Bible Google Docs spreadsheet (tabs are at the bottom of the page).