Error Unexpected Response 0x68 //free\\ - Handshaking...

If the basic troubleshooting steps do not resolve the issue, try the following:

: Details on the timing requirements for automotive handshaking. FTDI Troubleshooting : Common fixes for serial-to-USB handshaking failures. To help you more specifically, could you tell me: handshaking... error unexpected response 0x68

: In some TLS implementations, 0x68 (decimal 104) may appear in the Length field of a Client Hello message. An error here often suggests a buffer overflow or a mismatched protocol version (e.g., trying to use TLS 1.3 on a server that only supports TLS 1.1). Fix Unlocktool Handshaking Errors in Minutes (Works!) If the basic troubleshooting steps do not resolve

Ensure GPIO0 is pulled LOW during power-up for flashing, and ensure no other hardware is pulling RX/TX pins high or low. An error here often suggests a buffer overflow

The "handshaking... error unexpected response 0x68" is a frustrating hurdle often encountered by developers and hobbyists working with ESP8266 and ESP32 microcontrollers. This error typically surfaces during the flashing process when the Esptool utility fails to establish a stable communication link with the chip.

In many communication protocols (like the MercuryAPI for RFID readers or some CAN-bus tools), is a status code defined as: (Decimal: 104) Standard Meaning: TMR_ERROR_MSG_PICO_RECEIVE_TIMEOUT or a general "Response Timeout."