Firmware runs on a built-in 8051 MCU of DM5680 which is the Baseband chip of VTX.

It works on all VTXs, including VTX Whoop, VTX Whoop Lite, VTX Race V1, VTX Race V2, VTX Freestyle.

• Recommended build environment is Visual Studio Code
• Install PlatformIO IDE extension in Visual Studio Code
• Build source inside of PlatformIO (ctrl + alt + b)

• Navigate to .pio\build\{vtx model}
• Copy HDZERO_TX.bin to root of VRX SD Card
• Follow normal flashing proceedure

Please do not arbitrarily modify the data in use in the EEPROM, that may make your VTX not work.