The ultimate dual-mode FPV race timer - Works standalone with WiFi or integrates seamlessly with RotorHazard server. Built on ESP32-C3 for maximum performance and reliability.

Perfect for casual solo racing and practice laps

• Instant setup - Just power on and connect to WiFi
• Beautiful web interface - Works on any device (phone, tablet, laptop)
• Real-time RSSI monitoring - Visual feedback with live graphs
• Audio announcements - Lap times announced via browser speech synthesis
• Multi-band support - Raceband, Fatshark, Boscam A/E frequencies
• No server required - Everything runs on the ESP32-C3

Full integration with RotorHazard server

• 100% compatible - Drop-in replacement for standard RotorHazard solo nodes
• High-precision timing - FreeRTOS-based real-time processing
• USB connectivity - Plug and play with existing RotorHazard setups
• Optimized performance - WiFi disabled for maximum timing accuracy

Switch between modes instantly - no firmware changes needed. Use a simple jumper or switch to select WiFi or RotorHazard mode.

• FPV racing clubs - Standalone timing for practice sessions
• RotorHazard users - Professional timing node for competitions
• DIY enthusiasts - Easy to build and customize
• Mobile racing - Take timing anywhere with WiFi mode
• Testing and development - Debug FPV setups and frequencies

Want a fully assembled version? Pre-built boards are available at racefpv.io

Building your own? Check out the DIY Hardware Guide for the RX5808-based version with complete wiring diagrams and PCB design tips.

Want your own custom PCB? Fabrication files and schematics are available in the board/ directory for ordering your own Tracer boards.

1. Power on the device
2. Connect to WiFi network "tracer-XXXX"
3. Open browser to http://tracer.local
4. Start racing!

1. Connect via USB to your RotorHazard server
2. Add as timing node in RotorHazard
3. Full professional features available!

• ESP32-C3 SuperMini development board
• RX5808 FPV receiver module
• Mode selection switch (optional)
• Basic wiring tools

For detailed technical information, pin configurations, and setup instructions, see the docs/ folder:

• Setup Guide - Complete installation and configuration
• Hardware Guide - PCB design and wiring diagrams
• Display Customization - UI customization options

cd Tracer/
pio run -e esp32-c3-supermini --target upload
pio run -e esp32-c3-supermini --target uploadfs

Note: Both commands are required - one uploads the firmware, the other uploads the web interface files.

Common issues and solutions are covered in the Setup Guide. For RSSI problems, frequency issues, or connectivity troubleshooting, check the documentation.

Ready to race? Get started with the Setup Guide and join the FPV racing community!