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Old 05-21-2008, 12:10 PM   #160 (permalink)
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Location: St. Louis
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silverciv - '01 Honda Civic EX 2dr
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It looks like the RX schematic on the ELM is converting ttl to rs232 but, the TX line doesn't look like it.

I am switching tx and rx. I had it working once before. I have a pre-built ELM which I have tested with a USB to serial adapter and hyperterminal.

Also, I do have to unhook things to program the arduino

Last edited by jmonroe; 05-21-2008 at 12:11 PM.. Reason: forgot something
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