Update README.md

Author: traviscea

README.md

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 # Pi-Arduino-Digital-Dash
 A DIY digital dash I made using a Raspberry Pi 5, Arduino Mega 2560, and a touchscreen.  While my use case was a 02-07 Subaru WRX/STI variation, this will work for any car from 1920-2025+, with OEM ECUs, Standalones ECUs, with or without CANBUS...as long as you have sensors to pass data, this can work for you.  This [youtube video](https://youtu.be/Trl1QRnZZaE) contains an entire walkthrough
 
+#### For CANBUS ####
+Please read the ```CANBUS_Communication_Setup.md```
 I have added a Haltech INO to read directly from haltech's CANBUS.  This is just a WIP/draft and the arduino will need to be added as a CAN node.  That can be done with this 10$ part(https://a.co/d/0xAnIYF)
 
 Future standalones/canbus configs will be added as I have time.