I am unable to connect to the ESP8684 module for flashing using esptool.py. When attempting to run the flash_id command,

[Accound]

A fatal error occurred: Failed to connect to ESP32-C2: Invalid head of packet (0xE3): Possible serial noise or corruption.
Additionally, I have tried using idf.py for flashing as well as Espressif IDE, but I encounter similar issues in both cases, preventing successful code flashing.
System Setup:
Chip Model: ESP8684-WROOM-01C
Development Environment: ESP-IDF v5.2.2
USB-to-Serial Adapter: USB-Enhanced-SERIAL CH9102
Power Supply: 3.3V regulated supply
Troubleshooting Steps Taken:
Verified the connections of TX, RX, 3.3V, GND, GPIO0, and EN pins.
Confirmed GPIO0 is held low during reset to enter bootloader mode.
Tried flashing at multiple baud rates (115200, 74880, etc.).
Tested with a different USB-to-serial adapter and COM port.
Updated esptool.py to the latest version (v4.8.1).
Attempted on an alternate computer to rule out local configuration issues.
Despite these steps, I continue to encounter the "Invalid head of packet" error. I would greatly appreciate any additional guidance or troubleshooting recommendations for resolving this issue.

[ESP_Sprite]

What specific hardware are you using? Can you post schematics?

[Accound]

Add a small capacitor (typically 10 μF) between the EN pin and GND. This can stabilize the signal and sometimes helps with communication issues during flashing, especially on ESP8684-based setups.


we try

but it is not help

we have tsem problem

we try this way too. but nothing has changed, we have the same problem

[ESP_Sprite]

What specific hardware are you using? Can you post schematics?

[sonukmrsah]

I also get these error a lot since I started doing embedded and I figured out this can be due to a number of reasons, it may be due to driver issue, cable problem, etc. but recently I got this error and I took my microcontroller from the board and freed up the ESP from all the wires except the data cable to upload, and the upload was successful. I recommend doing the same, but I wanted to know the reason for this specific behaviour.

[Accound]

I am unable to connect to the ESP8684 module for flashing using esptool.py. When attempting to run the flash_id command, I encounter the following error:
vbnet


A fatal error occurred: Failed to connect to ESP32-C2: Invalid head of packet (0xE3): Possible serial noise or corruption.
Additionally, I have tried using idf.py for flashing as well as Espressif IDE, but I encounter similar issues in both cases, preventing successful code flashing.
System Setup:
Chip Model: ESP8684-WROOM-01C
Development Environment: ESP-IDF v5.2.2
USB-to-Serial Adapter: USB-Enhanced-SERIAL CH9102
Power Supply: 3.3V regulated supply
Troubleshooting Steps Taken:
Verified the connections of TX, RX, 3.3V, GND, GPIO0, and EN pins.
Confirmed GPIO0 is held low during reset to enter bootloader mode.
Tried flashing at multiple baud rates (115200, 74880, etc.).
Tested with a different USB-to-serial adapter and COM port.
Updated esptool.py to the latest version (v4.8.1).
Attempted on an alternate computer to rule out local configuration issues.
Despite these steps, I continue to encounter the "Invalid head of packet" error. I would greatly appreciate any additional guidance or troubleshooting recommendations for resolving this issue.

[Accound]

I am unable to connect to the ESP8684 module for flashing using esptool.py. When attempting to run the flash_id command, I encounter the following error:
vbnet


A fatal error occurred: Failed to connect to ESP32-C2: Invalid head of packet (0xE3): Possible serial noise or corruption.
Additionally, I have tried using idf.py for flashing as well as Espressif IDE, but I encounter similar issues in both cases, preventing successful code flashing.
System Setup:
Chip Model: ESP8684-WROOM-01C
Development Environment: ESP-IDF v5.2.2
USB-to-Serial Adapter: USB-Enhanced-SERIAL CH9102
Power Supply: 3.3V regulated supply
Troubleshooting Steps Taken:
Verified the connections of TX, RX, 3.3V, GND, GPIO0, and EN pins.
Confirmed GPIO0 is held low during reset to enter bootloader mode.
Tried flashing at multiple baud rates (115200, 74880, etc.).
Tested with a different USB-to-serial adapter and COM port.
Updated esptool.py to the latest version (v4.8.1).
Attempted on an alternate computer to rule out local configuration issues.
Despite these steps, I continue to encounter the "Invalid head of packet" error. I would greatly appreciate any additional guidance or troubleshooting recommendations for resolving this issue.

[aliarifat794]

Serial communication can be sensitive to noise. Add a capacitor (e.g., 10 µF electrolytic and 0.1 µF ceramic) close to the ESP8684 module’s power pins to help smooth any voltage fluctuations.

[Accound]

No, we have already tried this method.

If possible, I hope we can chat privately or contact each other by email. I can't upload the schematic, which makes me anxious

[Accound]

Could you please specify what pins you used for flashing code into ESP?
In my case I used (RX, TX, 3V3, GND, EN and IO0).