Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Any interest in developing an open source fuel economy gauge/computer?

jmonroe · 05-21-2008, 11:32 AM

Does the ELM use TTL straight out of the chip? I am currently trying to use a MAX233 on the Arduino side to convert the ttl to rs232 but, I am having some trouble. I thought that the chip itself used rs232 but, I hope I am wrong.

05-21-2008, 11:32 AM	#158 (permalink)
jmonroe EcoModding Lurker Join Date: May 2008 Location: St. Louis Posts: 28 silverciv - '01 Honda Civic EX 2dr 90 day: 36.13 mpg (US) Thanks: 0 Thanked 0 Times in 0 Posts	Does the ELM use TTL straight out of the chip? I am currently trying to use a MAX233 on the Arduino side to convert the ttl to rs232 but, I am having some trouble. I thought that the chip itself used rs232 but, I hope I am wrong. __________________