Opel/Vauxhall/Holden Astra H Ash Tray Insert

Ash Tray Insert for Opel Astra H. I wanted to monitor the battery voltage and Coolant temperature in my Opel Astra H, so i designed this model to replace the Ash Tray with a nice little Screen to show me this information.

I used this Screen https://amzn.eu/d/7jFRpd0 connected to an ESP32 and this OBD2 Adapter https://amzn.eu/d/0ByxSAM which turns off after 30 mins of inactivity and therefore doesn't drain the battery.

Update:

Uploaded Code to Github: https://github.com/danuvius92/astra_h_infodisplay

Update 03.10.2024:

Added Wiring Diagram at Github

Added my TFT_eSPI's User_Setup.h at Github