Connect to the port and watch the hex stream during the handshake. Look at the bytes immediately before and after 0x68 .
: The USB port dropped voltage momentarily, forcing the phone out of BROM mode mid-handshake. Step-by-Step Troubleshooting Framework
: The client and server do not support the same version of a protocol (e.g., trying to use TLS 1.3 when the server only supports TLS 1.2). Network Interference handshaking error unexpected response 0x68
Note: Remember to re-enable your security software immediately after testing. Method 4: Clear Network Cache and DNS Corrupted cache files can cause handshake mismatches. Open your command prompt or terminal. Type ipconfig /flushdns (on Windows) and press Enter. Restart your router to clear its internal cache. Method 5: Disable VPNs and Proxies
He typed: HANDSHAKE ACCEPTED.
When an "unexpected response 0x68" occurs, it signifies that during this delicate negotiation phase, the host received a byte of data with the hexadecimal value 0x68 (which translates to the decimal number 104, or the ASCII lowercase letter 'h') from the slave device, and this byte was not what the host's communication state machine was programmed to expect at that precise moment.
If you want to look at more specific debugging alternatives, let me know the you are working on, the chipset architecture (e.g., MT6768), and the specific tool software you are running so we can narrow down the direct solution. Connect to the port and watch the hex
The receiving system expected a specific byte but received 0x68 instead. Common Causes of the 0x68 Handshaking Error
If using a specific application (like a game or database client), ensure it is fully updated. Method 2: Check SSL/TLS Settings Open your command prompt or terminal