: Ensure you are using a "cross-line" (Null Modem) cable if required, where TX (Transmit) on the PC connects to RX (Receive) on the STB, and vice versa. Driver Issues
The error indicates a communication failure where the computer is sending data, but the STB's processor is not acknowledging it or receiving the "GET" command required to initiate the handshake. Primary Causes & Solutions : Ensure you are using a "cross-line" (Null
: The device is not seeing any data on its RX (Receive) pin, which should be coming from your PC's TX (Transmit) pin. : Ensure you are using a "cross-line" (Null
logic. If your serial adapter is set to 5V, it may fail to communicate or damage the board. Driver & Port Issues Device Manager : Ensure you are using a "cross-line" (Null