Enabling mixed frame and or extended Low Speed CAN single wire frames like those posted on GMLAN bible

[ironduke]

Could try option 11 to change connect flag but I don’t think that will help.. afaik that’s grabbing every message on the bus, I’ll do a little more digging..

[04colyZQ8]

Well for sure I am not seeing all messages …

Otherwise I just can’t accurately send them… if you send low speed messages or inject them into the data steam do you need a special checksum or sending module identifier?

[ironduke]

Do you have a low speed log of using the app to lock and/or unlock the doors?
Is there just no data being read? or your not finding what you'd expect?

With low speed I have been able to mimic the lock and unlock commands coming from RCDLR to the BCM and make the doors unlock/lock and I even got the remote start to work if I woke up the low speed with a test light connected to b+ momentarily. Now I can send wake up messages so I assume I could do that now with just code.

[04colyZQ8]

Do you have a low speed log of using the app to lock and/or unlock the doors?
Is there just no data being read? or your not finding what you'd expect?

With low speed I have been able to mimic the lock and unlock commands coming from RCDLR to the BCM and make the doors unlock/lock and I even got the remote start to work if I woke up the low speed with a test light connected to b+ momentarily. Now I can send wake up messages so I assume I could do that now with just code.

That’s what I’m trying to do as well. But I don’t have an external rcdlr it’s internal to the bcm, with separate dumb antenna (no data). But onstar is external and can lock, flash lights and start the car.

I know for sure it’s pin 1 can, as I isolated the high speed wires to the module and it still locks, unlocks doors and gets vehicle info without it.

But I see only two messages sent from onstar when I lock, or unlock or flash lights and it allways the same!

High voltage wake up then keep alive Vlan.

So we are missing the lock, unlock flash lights messages?

I’m certain it’s sent via 29 bit extended frame id message. I do not see how to enable logging it? I’m only seeing 11 bit ids on ls can at 33.3k nothing at 83.3k

Im seeing this
00 00 06 XX
00 00 02 XX

But need to see
10 01 XX YY ids

[04colyZQ8]

Guess I’ll have to make my own with arduni or stm32 and can transceiver

[kur4o]

You can try this, but I highly suspect that you have 29bit can frames, Gm start using them with globalB.

It is possible there is direct connection with bcm on separate wiring that triggers what you need. Old RKE used something like that. A careful inspection can reveal hidden discrete wires.

[04colyZQ8]

Yes an agree it’s likely 29 bit.

No discrete wires only power, ground, ign and 5960 low speed can hooked up on bench and it locked unlocked my bcm on the bench

[kur4o]

It may use different baudrate, even though it should be negotiated first. or the tool you have don`t process data as valid can frames.

[04colyZQ8]

Possibly it’s either 33.3 or 83.3 baud rate correct?

I am using an old mongoose pro II v0404.

I tried both of these.

[04colyZQ8]

Btw thanks for everyone’s help if I wasn’t sounding appreciative yet!