You’re not just debugging a handshake. You’re debugging timing . Somewhere, your device started listening 2 milliseconds too early — catching the tail end of a previous transmission.
In the context of modem communications, for example, the 0x68 error might relate to a failure in establishing a connection due to a misinterpretation or mismatch in the communication parameters. This could be due to a variety of reasons including: handshaking... error unexpected response 0x68
are frequently caused by poor data transfer. Use a high-quality original USB cable and try a USB 2.0 port instead of USB 3.0. Reflash Stock Firmware You’re not just debugging a handshake
UART communication requires matching parameters beyond just baud rate. handshaking... error unexpected response 0x68
