: Since these devices rarely have a user-facing update portal for manual files, flashing "full" firmware often requires a microSD card boot script or connecting to the device's internal UART (Serial) headers using a USB-to-TTL adapter.
Keep holding all three buttons down until the screen lights up and displays an official EMUI upgrade processing screen.
Camal00 is a compact, open-source firmware project aimed at bringing advanced features and customization to budget microcontroller-based devices (primarily ESP8266/ESP32 variants). "Firmware full" typically refers to the complete firmware image or a full-featured build that includes all modules, extras, and utilities rather than a minimal or stripped-down release.