Freematics Forum

stanley wrote:Sorry J1939 is not supported though 24v voltage has no problem.

A lot of thanks stanley.

stanley wrote:24V voltage should be no problem. You also need to check the protocol. Some trucks use J1939 which our OBD-II adapter does not support.

A lot of thanks stanley, we are trying to read in a MAN TGX vehicle, it seems use J1939 protocol, how can I read it?

Best regards

Can run the OBDII adapter on trucks? at 24V

Hi,

due to no answer on this forum about my problem, I have open the OBD adapter to find the solution, because other users seem not having my problem.

as I Said before, there's effectively an hardware problem on the adapter : The resistor R4 WAS NOT SOLDERED CORRECTLY : it was shifted and only ...

I have this code to read an show some PIDs, I don't know why but only read the first (RPMs) the other values are 0 or the same as RPMs, can somebody help me? I think that all is correct.

Best regards


#include <Arduino&#46;h>
#include <Wire&#46;h>
#include <SoftwareSerial&#46;h>
#include <OBD&#46 ...