OBD UART with Arduino

Development Boards Arduino
1

Hello,

I have bought OBD UART board from Sparkfun. My purpose is to query the obd for engine rpm and save it into arduino memory. I have been trying to connect the board to arduino mega 2560. I’m using arduino serial monitor instead of LCD display. I have tried the code available in the tutorial at sparkfun but had no luck. Somehow, the code seemed to work with OBD but the parameters received from OBD port were not as expected. I was sending 010C to query the rpm of engine. I received random number 1780010C and 860010C in return. These numbers were received while no throttle was at rest. The second bits of value seems to be echo but the second first bit is not recognizable.

Please help me with it.

Regards

Farooq

2

How about showing a bit of your CODE maybe?

Or we can all guess that you put a tomato in your fuel tank and are expecting ketchup to come out of the tailpipe.