S3XY CAN Hunt

Erwin Ried

About this app

S3XY CAN Hunt helps you investigate and identify unknown CAN bus signals on your Tesla. The core idea is simple: take a snapshot of the current CAN bus state, perform an action in your car, then compare what changed to pinpoint which signals are tied to that action.

How it works:
1. Connect to your Tesla via the S3XY OBD WiFi gateway
2. Take a snapshot of all current CAN bus values
3. Do something in the car — turn on the AC, open a window, press the brake
4. Compare against the snapshot to see which values changed, incremented, or toggled
5. Narrow down and label the signals you discover

This investigative approach lets you systematically uncover what each signal does, even without any documentation.

Features:
- Snapshot & Compare: Freeze the CAN bus state and diff it against live data to isolate signals tied to specific actions
- Real-time Monitoring: Watch raw and decoded signal values update live as you interact with the car
- Signal Search: Filter discovered signals by CAN ID, name, or value range
- Data Export: Save your findings for further analysis or to share with the community

The app communicates over your local WiFi network using UDP on port 1338, working directly with raw CAN bus frames from the S3XY OBD gateway (ESP32-based OBD-II device).

Requirements:
- S3XY OBD WiFi gateway connected to your Tesla's OBD-II port
- Android device on the same WiFi network

Privacy:
- No data collection, tracking, or ads
- No internet access required beyond local network
- All vehicle data stays on your device

What’s new

Renamed app to S3XY CAN Hunt for consistent branding across the store and in-app experience.