Based on [Travis Goodspeed’s] GoodFET, the GoodThopter by [Q] uses the Microchip MCP2515 CAN to SPI controller to access the bus. The open hardware tool lets you send and receive messages using ...
and an SPI controlled MCP2515 CAN controller which take care of the particulars of the CAN protocol. The big chip in the middle is a PIC 16F876, responsible for making sense out of the data.
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