plugging in or switching on the power to the STB. The BootROM only listens for the UART signal for a few milliseconds after power-up. Cable and Wiring Check (Receive) on the STB is connected to (Transmit) on your USB-to-TTL adapter, and vice versa. Verify the
The error message typically appears when trying to flash firmware or debug a Set-Top Box (STB) , router, or embedded device via a serial (UART) connection. plugging in or switching on the power to the STB
Flashing incompatible firmware for your board. plugging in or switching on the power to the STB
This phrase indicates that the Boot ROM is waiting to receive a boot file over a serial (UART) connection. It is actively listening for a signal from an external host (your PC) to upload a bootloader image. plugging in or switching on the power to the STB