Know Your Device Architecture & File Types

VisiCan Hardware Generations

• Generations 1, 2, and 3: Share a common processor architecture across varying motherboard revisions.
• 4th Generation (2023–2025): Uses a dedicated MCU architecture (includes VentMount models).
• 5th Generation (2025+): Completely new hardware architecture featuring upgraded display panels, motherboard, MCU, and multi-button layouts.

Firmware File Types & Extension Reference

• .hex Main Firmware File: Responsible for OBD2/CAN-Bus ECU communication and rendering real-time telemetry on screen.
• .l4h 4th Gen Boot Logo: 240x240 pixel startup logo image file for 4th Generation displays.
• .lhh 5th Gen Full-Screen Boot Logo: 320x240 pixel startup logo image file for 5th Generation displays.
• .bah 5th Gen Boot Animation: 240x240 pixel startup animation sequence for 5th Generation displays.
• .lbh 5th Gen Day Mode Background: 320x240 pixel background image rendered under Light/Day UI mode.
• .dbh 5th Gen Night Mode Background: 320x240 pixel background image rendered under Dark/Night UI mode.

Requesting Latest Firmware Files

Firmware files are uniquely compiled and matched to your specific vehicle ECU and hardware build. To request your update package, email us with the following:

• Your contact details, order number, vehicle model/year, and VisiCan generation.
• A clear photo of your device System Info Screen (obtained by holding Button #3 down while turning on the vehicle ignition).
• Recipient Email: team@visicaneu.com
• Subject Line: VisiCan Firmware Update Request

Approved requests receive personalized download links via email within 1–3 business days.

USB-TTL Driver Installation (Windows PC)

We strongly recommend manually installing official drivers rather than relying on default Windows auto-drivers.

1. Download Drivers

Download the matching driver package for your computer OS and extract the ZIP archive to your Downloads folder:

• CP2102 Chip (Windows 10 / 11):
  Download CP210x Win10/11 Driver
• CP2102 Chip (Windows 7 / 8):
  Download CP210x Win7/8 Driver
• PL23xx Chip (Windows 10 / 11):
  Download Prolific Win10/11 Driver
• PL23xx Chip (Windows 7 / 8):
  Download Prolific Win7/8 Driver

2. Install Driver via Device Manager

1. Plug your USB-TTL programmer into your PC's USB port.
2. Open Device Manager, right-click your top PC node, and click Scan for hardware changes.
   
3. Locate CP2102 USB to UART Bridge Controller under Other devices, right-click it, and select Update driver.
   
4. Select Browse my computer for drivers.
   
5. Click Browse, select your extracted driver folder, and click Next to complete installation.
   
6. Once successfully installed, expand Ports (COM & LPT) and note down your assigned COM Port number (e.g., COM3 or COM4).
   

Flashing Firmware via WebTools

1. Connect your USB-TTL programmer lead to the 6-pin extension harness of your VisiCan display inside your vehicle. (Keep vehicle OBD cable plugged in).
2. Open the WebTools - Firmware Update Tool page:
   Open VisiCan WebTools Firmware Update Tool 🚀
   
3. Under Serial Connection, click Connect. Select your assigned COM Port from the pop-up dialog and click Connect.
   
4. Under Firmware Binary, click Choose File. Browse and select your downloaded firmware or asset file (.hex, .lhh, etc.) and click Open.
   
5. Bootloader Mode Activation: Turn OFF vehicle ignition. Press and hold Button #1 on your VisiCan display and turn the ignition back ON. The display screen will remain blank—this confirms the device is in hardware Programming (Boot) Mode.
6. While the device screen is blank, click the Flash Firmware button on WebTools to begin uploading.
   
7. Once complete, WebTools will display Flash Complete, and your VisiCan display will automatically reboot with updated software.