Flashing issues with esp32 - any idea?

[Yann1k]

Hello everyone,

I recently acquired two ESP32 devices and am facing significant issues while attempting to flash them. The devices are:

1. ESP32 ETH01 WT32
2. ESP32 WROOM-32

The ESP32 ETH01 does not have a USB-C port, so the data transfer for flashing must be done through the pins. I am using a CP2102 adapter to make the connection. When connected, the TXD and RXD LEDs on both the CP2102 and the ETH01 blink rapidly and repeatedly.

Unfortunately, when I attempt to flash the devices, I consistently encounter the following errors:

Error 1:
COM14 failed to connect: Failed to connect to Espressif device: Serial data stream stopped: Possible serial noise or corruption.

Error 2:
A fatal error occurred: Failed to connect to ESP32: No serial data received.


The flashing process always halts after a series of dots following "Connecting......."

Here is the precise output of the flashing process:
```
Sketch uses 279213 bytes (3%) of program storage space. Maximum is 8388608 bytes.
Global variables use 20200 bytes (6%) of dynamic memory, leaving 307480 bytes for local variables. Maximum is 327680 bytes.
esptool.py v4.6
Serial port COM4
Connecting......................................


Although the ESP32 receives power, the same error occurs when attempting to flash it.

Does anyone have any ideas on what the issue might be or steps I can take to resolve this problem? I would greatly appreciate any help or tips.

Thank you in advance for your support!

[username]

You need to put the device in bootloader mode first before you flash it.