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Next time you see unexpected response 0x68 , don’t curse the hex. Listen to the 'h' . Your hardware is trying to tell you something — just not what you expected.
Hold for 10–15 seconds to force a hard reset. handshaking... error unexpected response 0x68
This error indicates a or baud rate disagreement during the serial handshake. The 0x68 response is often a "NACK" (Negative Acknowledge) or a status byte in protocols like IEC 60870-5-101/104 , DLMS/COSEM , or custom embedded systems . Next time you see unexpected response 0x68 ,
: Refer to the device manuals and manufacturer's support resources for specific guidance on resolving the 0x68 error. Hold for 10–15 seconds to force a hard reset
: If working with electronics, confirm that no other device on the bus is conflicting with address 0x68 and that your pull-up resistors are properly configured.