|
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
|