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latonita / arduino-canbus-monitor

Can bus monitoring tool based on arduino and can bus shield. Implements CAN ASCII/SLCAN protocol compatible with Lawicel CAN232/CANUSB. Can be used for monitoring low speed CAN (interior can bus of most cars, less than 500kbps). For higher speeds serial port can become a bottleneck in case data density is high.
MIT License
306 stars 91 forks source link

CanPlayer Not working #13

Closed seeklakhan closed 2 years ago

seeklakhan commented 2 years ago

So i have connected wires in this manner i'm able to do candamp can0 and receive packets correctly.

shot

so i did candamp -l can0

and when I'm doing canplayer -I file.log it's not working :(

latonita commented 2 years ago

Hi, i think you may try to record this way: candump -L can0 > myfile.log and then play it canplayer -I myfile.log

seeklakhan commented 2 years ago

candump -l file.log is also working fine i'm receiving CAN frames but its not performing actions on transmitting those frames like blinker turn on/off lights etc... although I also tried candump -L can0 > myfile.log canplayer -I myfile.log

still the same results

I have also done sudo ifconfig can0 txqueuelen 1000

so in simple words reply frame is not working

@latonita

seeklakhan commented 2 years ago

I noticed one thing more, i'm only receiving CAN data when car is started not on idle mode. in idle mode i should also received data right? when i press blinker etc... ? @latonita waiting for your reply

latonita commented 2 years ago

@seeklakhan i think you shall receive CAN data when you insert a key and turn it to ACC or ON mode. I can't remember data coming in OFF position

seeklakhan commented 2 years ago

@latonita so do you have any idea why am I not getting blinker, window, lights etc... CAN frames? i also tried reply attack on these items but reply attack is also not working any idea ?

latonita commented 2 years ago

@seeklakhan hm... that depends on the car and on where do you connect - to which can bus. typically there are several segments of can bus and between them are gateways which decide which messages go though, which are not. In my particular case Jeep Grand Ch. 2005 - I connect to "Interior CAN" which is low speed and connected to ECU via firewall of some kind. Although it receives some info on blinkers and other stuff since dashboard is also connected.

Check your car's wiring diagrams.

seeklakhan commented 2 years ago

@latonita these are my connected ports I have tested PIN 6 and 14 although i'm receiving data but i don't think i'm getting complete data what do you think which other PIN should i try ?


IMG20220407140636

latonita commented 2 years ago

what is this port? i have no idea) if its OBD port near the wheel - then it is behind extra firewall typically)

seeklakhan commented 2 years ago

@latonita yes its OBD port and I have checked one thing more today I'm getting CAN Low packets on pin 11. but when i'm doing replay attack or cansend its Not working i think you are right! there is firewall so how can bypass firewall ?

latonita commented 2 years ago

@seeklakhan you need to find another way to connect to CAN bus, not via OBD port

check your car's service manual, find which modules connected to low speed CAN bus and connect