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Old 09-22-2008, 09:55 PM   #29 (permalink)
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Ziggy - '95 Audi S6 Sedan

Manfred - '97 Audi A6 Quattro Sedan
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Clarabell - '03 Audi A4 Quattro Avant

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RJ45 for Onboard Power and for Programming

If a second RJ45 is provided on board it could be used to power the Guino in the car. This cable provides only +12V power and ground.

A programming cable could be built with an RJ45 plug on one end and a USB to TTL serial on the other. It provides +12V power, ground and programming signals. Power and ground fed through the same pins as the onboard power cable.

Remove the onboard power cable from the Guino. Plug in the programming cable. Program the Guino. Swap the cables back. Walla! New code.

If current carrying capacity is an issue, use 2 wires for power and 2 wires for ground. The remaining 4 are available for programming signals.
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