If you have TX to TX, the STB will never "receive" the command, leading to a timeout or a buffer error. Try swapping the TX and RX pins to see if the error clears. 2. Adjust the Baud Rate
Cheap RS232-to-USB adapters (especially those using "fake" Prolific chips) often have timing issues that cause the STB buffer to overflow. If possible, switch to an adapter using the or FTDI chipset, as they handle high-speed serial data much more reliably. 5. Disable "FIFO" Buffers in Windows If you have TX to TX, the STB
on your adapter must go to RX (Receive) on the STB. If you have TX to TX
To understand the fix, you need to understand the "conversation" happening: If you have TX to TX, the STB