Setting Vehical Speed on MQB TTS Cluster

[benni4000]

Hey, i am new to this amazing forum!

I hope that maybe someone can help me with my Problem to get a TTS Cluster working (so far as possible) as standalone.
Its already possible to set RPM, Red Mark of RPM Limit and such other things.


I am trying to set Vehical speeed on ID 0x0FD (ESP_21) but it just does nothing. I think its a checksum problem because other things are working and 0x0FD is checksumed at Byte0

I've already checked this forum and found a MQB Checksum Algorithm with those "Magic Bytes" and i'm almost sure it am using it correctly.
Here the code i've implemented: https://github.com/commaai/opendbc/blob ... /common.cc

Does someone have any Idea how to solve it?

Regards Benni

[golfdubcrazy]

Hi,

been a while since i looked at this try send messages on id 320 bytes 4/5 for speed.

Hopefully that helps

[sergeular]

Hey, i am new to this amazing forum!

I hope that maybe someone can help me with my Problem to get a TTS Cluster working (so far as possible) as standalone.
Its already possible to set RPM, Red Mark of RPM Limit and such other things.


I am trying to set Vehical speeed on ID 0x0FD (ESP_21) but it just does nothing. I think its a checksum problem because other things are working and 0x0FD is checksumed at Byte0

I've already checked this forum and found a MQB Checksum Algorithm with those "Magic Bytes" and i'm almost sure it am using it correctly.
Here the code i've implemented: https://github.com/commaai/opendbc/blob ... /common.cc

Does someone have any Idea how to solve it?

Regards Benni

good afternoon, did you manage to find the formula for calculating the checksum?
or any solution to this problem?
I need to make a speed arrow for audi Virtual Cockpit, but I can't get it to start.
please help me with the solution

[Jacobsmess]

viewtopic.php?p=81924&hilit=0x0FD+mqb#p81924 solution is probably in here