IRONIQ ESP32 Preconditioning Helper

Small MicroPython app for ESP32 that talks to the Hyundai/Kia EV M-CAN bus and helps trigger battery preconditioning.

What it does

• Sends the preconditioning toggle frame when the BOT button is pressed.
• Monitors BMU status and battery temperature CAN frames.
• Shows a simple LVGL UI with:
  • command state,
  • battery temperature,
  • estimated time to reach 21C,
  • BMU preconditioning status.

Hardware and software

• ESP32 board running MicroPython.
• CAN transceiver (for example TJA1050) connected to the ESP32 CAN pins.
• micropython-esp32-twai driver available as import CAN.
• Display stack used by this project (lvgl, s3lcd_lvgl, and related board libs).

Run

1. Copy project files to the device.
2. Ensure main.py imports ironiq and calls ironiq.main().
3. Reboot the board.
4. Press BOT to start/stop preconditioning logic.

Files

• ironiq.py: main CAN logic and UI.
• main.py: program entry point.
• config.py: local config values.
• tests/: helper scripts and experiments.

Safety note

This project sends CAN traffic. Use only on hardware you understand and at your own risk.