u/madsvodder

Hi everyone. I'm working on a side project. A small standalone dashboard for my car that shows gauges and trip computer info, pulling data off the CAN bus. The usual stuff a lot of people here do.

I originally wanted to keep it all on the ESP32-P4 with a DSI panel and LVGL. The problem is that finding a display the correct size is difficult, and LVGL updating + display drivers is a pain.

I was thinking about running a Qt application on a small Raspberry Pi / Orange Pi instead. The P4 would grab all the data I need from CAN, and the Pi would display it.

I'd like to hear some thoughts on this, or any other recommendations. Thanks!

Hi. I'm looking for an alternative to the LilyGO T-Display Long. It has been discontinued / is sold out everywhere. Is there a development board that's roughly the same size? I haven't been able to find one yet. I would prefer P4, but S3 is also fine,

Thanks!

Hi. I'm starting to dive into the adventure of car hacking. So far, I have managed to make an LED flicker disabler in my Saab 9-3 using "Write Data by Identifier" in GM LAN (very cool!).

Now I have started sniffing some data. I have created a C# application which works with the Scanmatik 2 Pro and GM LAN 33.333 / SW-CAN. This only works because the Scanmatik can be configured to use pin 1 on the OBD port.

Now I would like to use SavvyCAN instead. What would be the best interface here? I'm having a hard time finding something that works with GM LAN / I-bus / SW-CAN (Saab uses pin 1).

Also, what I originally wrote this post for: I'm having a hard time understanding something about the CAN bus system. Let's say I sniff the signal for rolling down the window, and that ID is 243, byte 5. How would I send that message to roll down the window without disturbing any other bytes? Maybe I'm misunderstanding CAN completely. It's a bit hard to explain, so I hope you understand. Thanks!