Open-source hazard warning system for grassroots motorsport | Web flasher available | 4 hardware variants × 4 regional configs | Built by Wheel Have

⚡ Flash ESP32 & ESP8266 firmware directly from your browser. No installs, no drivers — just WebSerial + esptool-js. Single HTML file, drag & drop .bin flashing, device info panel, and serial console.

Browser-based firmware flasher for ESP8266, ESP32, S2, S3, C3, C6, H2 and Wemos D1 Mini. Drop a .bin file and flash ( no Python, no IDE, no installation. Built with Web Serial API. Host on GitHub Pages and use it anywhere. )