Based on the error message you provided:

"bootrom error wait for get please check stb uart receive hot,"

If you're staring at the error message you are likely trying to flash firmware onto a Set-Top Box (STB) or a similar embedded device using a serial connection . This error is a classic "handshake failure," meaning your computer's upgrade tool is waiting for a signal from the device that never arrives—or arrives corrupted. What Does the Error Actually Mean?

• Reconnect UART with correct TX/RX and common ground.
• Set baud rate to 115200, 8N1, no flow control.
• Power device while holding a key (e.g., Ctrl+C or Space) to enter download mode.
• Use tool like sbrick or STM32CubeProgrammer (if applicable) to send boot image.
• After successful transfer, error changes to boot success or device resets.

BootROM communication failure

This typically indicates a between a host PC and a device (often a set-top box, router, or embedded board) over UART. Below is a feature explanation — what the error means, why it happens, and how to resolve it.

Sequence Matters

: Press "Start" in your software before powering on or restarting the STB to ensure the computer is ready to catch the initial BootROM request.