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Old 03-05-2018, 02:06 PM   #43
ermax
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Just a quick update: I updated the code a little (better reliability of connexion initialization mostly) and changed the way the system is powered in the car.

Now the arduino is directly plugged in a +12v after ign with two 6800nF capacitors.
This way it has the time to open the doors if needed when turning ignition off and then do not draw any current.

This way no worries about the battery if the car is not driven enough.

I've been using this since a few months and some track days without an issue
Brilliant idea!

Oh wait, you can unlock the doors when the ignition is off? I could have sworn I tried this without success. I am using this for door unlock: 750#4005301100400000

I guess I need to test this again. Or maybe there is some sort of grace period or you are sending the command before the key has been completely removed. It would be cool if you could unlock the car without the key in the ignition. Then you could do some sort of BLE proxy unlock/lock.

Last edited by ermax; 03-05-2018 at 05:46 PM.
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Old 06-05-2018, 02:21 PM   #44
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Brilliant idea!

Oh wait, you can unlock the doors when the ignition is off? I could have sworn I tried this without success. I am using this for door unlock: 750#4005301100400000

I guess I need to test this again. Or maybe there is some sort of grace period or you are sending the command before the key has been completely removed. It would be cool if you could unlock the car without the key in the ignition. Then you could do some sort of BLE proxy unlock/lock.
Sorry I did not saw your edit !

There is indeed a grace period (would say about a minute or two).

If we could understand the messages to wake up a specific control unit (lets say the one that manages doors locks / power windows) it would be possible to do many more things like openning the windows remotely etc.

But so far and alone no luck !
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Old 07-19-2018, 12:09 AM   #45
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Iíve been using a Raspberry Pi in my car because it was more flexible. Samba, Syncthing, WiFi, webserver, etc etc. The downfall is boot time and it doesnít have analog input and I am looking to add an oil pressure gauge soon so I need analog. So I pulled out my Arduino Uno and can shield. I took your project as a starting point and swapped out the coolant gauge and replaced it with the Sport LED. I have MT so the sport light is never used anyways.

So here are the functions I sniffed out tonight.

Key fob beeper on and off
Headlights on and off
Track light on and off
Sport light on and off

I got some logs for the AT oil over temp light but so far I havenít been able to find the right packets in the log. That seems like a good LED for the oil temp warning. I have logs for most of the LEDs but only track and sport jumped out at me. I need to study the other logs more closely.

I will post the hex for what I have so far tomorrow when I am back at a computer.

Some other observations I made. I have the Arduino powered off the OBD2 port so itís always on. I was blown away that I was able to lock and unlock the doors even when the key was out. Even after using my key fob to lock the doors. There seems to be no grace period either. So I will probably pick up a BT shield and look into making some sort of proximity unlock when my iPhone is in range.

I was also able to activate the key fob beep when the key is out. My plan is to watch the fuel level and anytime it goes up it will assume I am pumping gas. When it sees me pump gas it will increment a counter. On my second fill up it should be roughly 800miles and at that point I will activate the key fob beep 5 times rapidly to remind me to check the oil. This will be great because I will hear it on the outside of the car when Iím standing around waiting for the pump. I just need to verify that I can query the fuel level when the car is off.
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Old 07-19-2018, 09:33 AM   #46
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Okay the sport light isnít going to work. It worked fine when testing it in the drive way but when I drove to work this morning it turned off when I started moving. Figured I had a big but then I noticed it comes back on when I stop moving. So something is overriding my packets to turn on the light when the car is moving.

I have a dump while the seatbelt beeper was going off. I need to see if I can isolate the packets for the beeper. That would be a good warning. Go beep-beep-beep when it gets up to temp and if itís over temp beep faster and continual.
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Old 07-19-2018, 10:15 AM   #47
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Code:
Key fob beep On:  750#4004301400800000
Key fob beep Off: 750#4004301400000000

Track Light On:   7B0#3007000000008080
Track Light Off:  7B0#3007000000008000

Sport Light On:   7B0#0530310080800000
Sport Light Off:  7B0#0530310080000000

Low Beams On:     750#4005301500400000
Low Beams Off:    750#4005301500000000
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Old 07-19-2018, 02:02 PM   #48
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Hi !

Great ! Did you have any issues running the code on the arduino ?

For the dash lights everything I tried failed miserably as it seems that techstream only set the dash in some "test state" when turning on off specific lights. So when driving it turns off all other lights except the tested one ...

So far I did not found any other way to use them :/
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Old 07-19-2018, 02:10 PM   #49
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Hi !

Great ! Did you have any issues running the code on the arduino ?

For the dash lights everything I tried failed miserably as it seems that techstream only set the dash in some "test state" when turning on off specific lights. So when driving it turns off all other lights except the tested one ...

So far I did not found any other way to use them :/
No problems running your code. Installed the library zip that you included and it compiled and uploaded with not problems. I would just rather have a light for the status.

The sport light didn't work so I switched it to use the track light. I suspect it will also only work when the car is not rolling.
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Old 07-19-2018, 02:20 PM   #50
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No problems running your code. Installed the library zip that you included and it compiled and uploaded with not problems. I would just rather have a light for the status.

The sport light didn't work so I switched it to use the track light. I suspect it will also only work when the car is not rolling.
I will try to do some further tests to see if I can help you, but so far no luck.

I bet that it will be easier to use a digital output on the arduino to drive a led (on the top of the oem mic?) or a speaker (lets say in the glove box).

Using the can bus of this car is a pita compared to other brands ...
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Old 07-19-2018, 03:04 PM   #51
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I will try to do some further tests to see if I can help you, but so far no luck.

I bet that it will be easier to use a digital output on the arduino to drive a led (on the top of the oem mic?) or a speaker (lets say in the glove box).

Using the can bus of this car is a pita compared to other brands ...
Yeah I was thinking about plugging a piezo.
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