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Web Interface (ESP32)

ESP32 boards (and M5Stack Atomic CAN Base) feature an optional web interface for remote monitoring and control via WiFi.

Accessing the Web Interface​

  1. Power on the board — it will create a WiFi hotspot
  2. Connect to WiFi:
    • Network: TeslaCAN
    • Password: canmod12
  3. Open a browser and navigate to: http://192.168.4.1

Features​

Real-Time Status​

  • FSD Active: Current FSD state
  • Bypass TLSSC: Whether the TLSSC requirement is bypassed
  • ISA Speed Chime Suppress: Suppression status (HW4 only)
  • Emergency Vehicle Detection: Detection status (HW4 only)
  • Speed Profile: Current active speed level
  • Speed Offset: Current offset value
  • Uptime: Board uptime in hours:minutes:seconds

Remote Controls​

Bypass TLSSC Toggle​

Enable or disable FSD activation without the "Traffic Light and Stop Sign Control" requirement.

  • Build-enabled: Always available
  • Runtime enabled: Can be toggled on/off via web UI

ISA Speed Chime Suppress (HW4 only)​

Suppress the ISA (Intelligent Speed Assistance) speed warning chime.

  • Build support: Requires ISA_SPEED_CHIME_SUPPRESS define at compile time
  • Runtime control: Toggle on/off via web UI if supported

Emergency Vehicle Detection (HW4 only)​

Enable emergency vehicle detection and response on HW4 vehicles with FSD v14.

  • Build support: Requires EMERGENCY_VEHICLE_DETECTION define at compile time
  • Runtime control: Toggle on/off via web UI if supported

Log Toggle​

Enable or disable serial and web log output.

Live Log​

Real-time scrolling log showing debug output from the firmware. Displays timestamps and log messages.

OTA (Over-The-Air) Firmware Updates​

Update your board's firmware wirelessly without needing a USB cable.

How to Update​

  1. Compile your firmware locally using PlatformIO:

    pio run -e esp32_twai

    This creates a binary file in .pio/build/esp32_twai/firmware.bin

  2. Open the web interface and navigate to the "OTA Update" section

  3. Select the firmware file and click "Upload Firmware"

  4. Wait for completion — the board will reboot automatically after a successful update

Important Notes​

  • The board requires WiFi connectivity during the update
  • Do not power off or disconnect WiFi during the update process
  • A successful update message will appear in the OTA Status area
  • If the update fails, the board will retain the previous firmware

Available Endpoints​

The web interface exposes the following API endpoints:

  • GET /api/status — Get current state (FSD, profile, uptime, etc.)
  • POST /api/bypass-tlssc — Toggle Bypass TLSSC
  • POST /api/isa-speed-chime-suppress — Toggle ISA chime (HW4 only)
  • POST /api/emergency-vehicle-detection — Toggle emergency detection (HW4 only)
  • GET /api/log — Retrieve recent log lines

Building with Web Interface​

The web interface is only compiled when using DRIVER_TWAI (ESP32 boards).

To enable it, use the PlatformIO environment:

pio run -e esp32_twai
pio run -e m5stack-atomic-can-base

Other boards (RP2040, M4) do not have web interface support.