📡 OFFICIAL MAPFEST FIRMWARE v1.0.4

Flash Your Heltec V4

Install the official MapFest firmware on your Heltec WiFi LoRa 32 V4 directly from your browser. Zero software installation required.

1

Connect Your Device

Plug your Heltec V4 into your computer via a USB-C data cable.

2

Click Connect & Install

Tap the button below and select your device from the browser popup (e.g., CP210x or USB JTAG/serial).

3

Ready for the Festival

Your Heltec will reboot into active LoRa mesh mode (917.3 MHz) with OLED diagnostics enabled.

Web Serial is not supported in this browser. Web Serial requires HTTPS.
⚠️ Web Flashing requires a browser supporting Web Serial API (Google Chrome, Microsoft Edge, Brave, or Opera on Windows, Mac, Linux, or Chromebook).
Need help? Read our Downloads & Sideloading Guide or visit our Shopify Store.