The error message "BootROM error: wait for 'GET', please check stb UART receive!" typically appears when a computer-based upgrade tool is unable to communicate with a Set-Top Box (STB) or microcontroller during a firmware flash or "revival" process. It indicates that while the software is waiting for a handshake signal from the device, it is not receiving any data back. Core Troubleshooting Steps
If you are encountering this error while trying to repair or upgrade a device (like a or similar STB), follow these steps: Verify Physical Connections:
Ensure your RS232 or USB-to-UART cable is securely connected to both the PC and the device.
Check for swapped lines: The TX (Transmit) pin on your cable must connect to the RX (Receive) pin on the device, and vice versa.
Ensure the GND (Ground) connection is solid between the two. Timing of Power-On: The error message "BootROM error: wait for 'GET',
Most upgrade tools require you to click "Start" or "Upgrade" on the software before powering on or restarting the STB.
If you power the device before the software is ready to "GET" the handshake, the bootloader window will close and communication will fail. Driver and Port Configuration:
Confirm that your serial cable drivers are correctly installed in Windows Device Manager.
In the upgrade software (e.g., GXDownloader_boot.exe), verify the COM Port matches the one assigned to your cable. Check Hardware Voltage: A leftover debug tag from Google’s early bootloader
Many boards use 3.3V TTL logic. If your USB-to-UART adapter is set to 5V, it may cause communication errors or damage the chip. Potential Causes
Corrupt Software: The upgrade tool or firmware file you are using might be damaged.
Interference: Anti-virus software or other active serial connections (like a virtual machine or another terminal) can sometimes block the UART port.
Flash Data Issues: If the device's internal flash memory is physically damaged, it may not respond to "GET" requests even with perfect wiring. incorrect UART/serial settings
The string google in this context is likely:
fastboot over UART) emit similar strings when waiting for a device handshake.It does not mean Google’s servers are involved; it’s purely a local embedded string.
During manual unbricking (e.g., using Amlogic USB Burning Tool), users are often told to short certain NAND pins or clock pins to force USB boot. If you short the wrong pins, you can force the SoC into a UART recovery loop instead of USB download mode.
Capture from power-on reset:
BootROM start
wait for get...
bootrom error wait for get please check stb uart receive google
Device fails to boot due to BootROM reporting: "wait for get please check stb uart receive google". Boot process halts waiting for a payload or command over UART (STB interface). Likely causes: missing or corrupted bootloader payload, incorrect UART/serial settings, hardware connection fault, or BootROM expecting a recovery/USB/serial download mode.