Freematics Forum

HI Stanley,


but still, in the other brands can't read any traffic broadcast byte...

please any idea???

Hi Stanley,

the make trucks is:

freightliner model cascadia
fuso model canter
mercedez model atego

Im testing the model "H" with the following brands of trucks: Freightliner, Fuso, Mercedes, using the library: "J1939_monitor", but I still can't read any byte from the trucks... any ideas

the code no pass this line:

J1939 data monitor started

not print anything else.

please help

Hi @chi,


I interested in model truck you uses to data capture.


please contact me: maicoll@bellpi.com

HI Stanley,

we already use the example that you say, and it doesn't detect any value. in (FreematicsPlus.cpp), I check up the tag "#define VERBOSE LINK" to see UART traffic, and add line to check protocol setted in (FreematicsOBD.cpp), like that:

if (protocol != PROTO_AUTO) {
sprintf(buffer ...

Hi Stanley, please read this,


The model H does not read protocol J1939, because the chip version elm327 v1.5 that you are using is not compatible with it.
I read this code: FrematicsOBD.ccp and I tried to send the following AT commands:

link->sendCommand("ATZ\r", buffer, sizeof(buffer), OBD ...