By methodically checking the and the integrity of the TX/RX crossover , you can usually bypass this error and proceed with your firmware flash.
: Disconnect and reconnect the power to both the device and the UART adapter. Sometimes other active connections (like a plugged-in USB cable) can interfere with the serial bootloader. By methodically checking the and the integrity of
: The BootROM is stuck in a loop, waiting to "get" a valid command or handshake signal from your computer. 1 stop bit
: Use 8 data bits, 1 stop bit, and No parity (8N1) unless the specific guide for your box says otherwise. Execute the "Power Cycle" Trick By methodically checking the and the integrity of