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Then the terminal spits out "chip sync error" and disconnects. I would like this to work because buying a ftdi cable isn't an option right now. I run the same problem too and took me countless hours to figure this error out. The problem seems the Baud rate starts at 115200 while the COM port is set to. 2010. 3. 8. · Chip Description. ESP8266 ESP-12N CP2102. Device Description. NodeMCU V1 ESP8266 ESP-12N CP2102. Hardware Configuration. SCL SDA FROM SSD1306 to D1 and D2, RX From gps to D3 TX from gps to D4, (sd card reader) SCLK to D5, DO to D6, DI to D7, CS to D8. How is Esptool Run. CLI. Full Esptool Command Line that Was Run. esptool.py -p /dev/ttyUSB0. 2017. 6. 29. · Are you using the same ESP32 chip this time, or a different chip? If this is a new chip, have you written the secure boot key to the efuse of the new chip with espefuse.py , same as the old chip? If this is the same chip with a new project, have you recompiled and reflashed a new bootloader or are you re-flashing the same bootloader-reflash-digest.bin?. The ESP32 Flash Download Tool, just like the ESP8266 download tool, is the official Espressif Download tool that runs on Windows platform. The tool can be used to modify and generate init BINs, generate consolidated BIN files or program multiple chips for production runs. The tool uses COM port to send BIN files from PC to the ESP32, which then.