The flash tool sent a "handshake" command to establish secure communication, but the device responded with an unexpected command ( 0x68 ), indicating it is either locked, insecure, or the communication is being interrupted.
If the master is querying a specific slave ID, but another device (or no device) is responding, the response data might be misinterpreted. handshaking... error unexpected response 0x68
: Use Wireshark to inspect the raw packets of a TLS handshake. Look for Client Hello , Server Hello , and any Alert messages (especially Alert Level 0x28, a fatal HandshakeFailure). The flash tool sent a "handshake" command to
In hexadecimal notation, 0x68 represents the ASCII character . This specific value is the ultimate clue to diagnosing and solving the issue. The Root Cause: Protocol Mismatch Look for Client Hello , Server Hello ,
A WebSocket handshake is an HTTP upgrade request. If a server cannot parse this request or is unable to fulfill it, it will return an unexpected response code like 0x68 (or more commonly, a standard HTTP error). The error often indicates a more fundamental protocol problem.
: Incorrect or outdated USB drivers (especially MTK or Qualcomm drivers) often cause the system to misinterpret device responses.