Freematics Forum

I have the V2 adapter for use with a mega 2560. I've managed to get my program to work great with a few vehicles. I get that the protocol J1850 VPW is not supported as you have said several times in this forum. What I didn't know at the time was the vehicle I planned to use this with was J1850VPW. I ...

I would like to add the pid for oil pressure. I believe the pid# for GM oil pressure is 22115c. I don't really know how to add that to the obd.h and obd.cpp files though. I would appreciate any help or examples from anyone who has successfully added a pid to the code.

Thanks

I finally resolved the issue. I guess I should've thought to check this earlier but this is my first arduino project. I'm not really sure what made me think to check it but for some reason I wasn't getting a good connection between the uart ground and the arduino. I messed with it and it works now.

I've tried several things now. I'm at the point where I don't know what to do next to try and get this to work. I wrote this just to try to get the battery voltage and display it on the serial monitor.
//Battery voltage test
#include <OBD2UART.h>
#define mySerial Serial

COBD obd;

void ShowVoltage ...

I have now tried the uart test on three different vehicles with the exact same results. A '13 jeep, the 2015 GM mentioned earlier, and a 2002 GM. After it performs the testout() function and shows "init..." on the serial monitor, it doesn't get the vehicles "VIN" and doesn't seem to perform the ...

I apologize for the rookie mistake. Thanks. It is initializing and returning things now. But I'm not sure if this is what its supposed to be doing. I ran the uart test and let it run for about 15 minutes and I also tried the rpm led test and it didn't work either. When I tried both of these tests ...

Hi,

I have the obd uart v2 and plan to use it on a GM ls1 engine. I am testing this on a 2015 Chevy 2500. I'm using a mega2560 and have white connected to tx0 and green connected to rx0 like the instructions say but when I try to use the obd_uart_test I get this return on the serial monitor ...

Hey Guys,
I'm new to the arduino world but not new to programming. By that I mean I have some experience with c++. I would rate my skills toward the higher end of basic so I'm far from being an expert. Big picture made small, I would like to get data from the OBD2 port in my car and display ...