Ok thanks, I understand now.
As you said, I'm using :
About the data results, it seems obdsim is now looking for queries, right ?
cidou@cidou-Inspiron-9300:~$ obdsim -g Cycle -s 30
Setting cycle length to 30 seconds
SimPort name: /dev/pts/1
Successfully initialised obdsim, entering main loop
10.000029 seconds. 0 samples, 0 queries. 0.00 s/s, 0.00 q/s
10.000102 seconds. 0 samples, 0 queries. 0.00 s/s, 0.00 q/s
10.000786 seconds. 0 samples, 0 queries. 0.00 s/s, 0.00 q/s
If I want obdsim to generate some speed datas for me, do I need to send the appropriate command (like i will do on the ELM327) ?
If I correctly understand the OBD-II PIDs ( http://en.wikipedia.org/wiki/OBD-II_PIDs ), I'll have to send 010D to get speed datas :
(hex) Data bytes returned Description Min value Max value Units Formula
01 0D 1 Vehicle speed 0 255 km/h A
But now, how can I communicate with obdsim ? Is it possible just with an other terminal ?