Remember: In serial communication, there’s no magic. Only bits, bauds, and bad handshakes. Now go fix that 0x68 .
In the world of serial communications, industrial automation, and legacy system integration, few errors are as simultaneously specific and infuriating as the message: "handshaking... error unexpected response 0x68" handshaking... error unexpected response 0x68
You might encounter this in a debug console while trying to flash firmware to a microcontroller, in a PLC (Programmable Logic Controller) communication log, or within a custom script controlling a serial device like a barcode scanner, modem, or payment terminal. Remember: In serial communication, there’s no magic