Invalid head of packet during uploading code (ESPTOOL-1109)

[cniedzi]

Operating System

Windows 11

Esptool Version

5.0.1

Python Version

Python 3.13.5

Chip Description

ESP32-D0WD-V3 (revision v3.1)

Device Description

Plain ESP32 Dev Module with CP2102 USB to UART chip.

Upload works seamlessly when used with ESP32 Dev Module based on CH340, or with Esptool 5.0.0.-dev1.

Hardware Configuration

Plain module without any connection. Only USB cable connected to PC for uploading code.

How is Esptool Run

Windows CMD or Arduino IDE, or Platformio (esptool.py)

Full Esptool Command Line that Was Run

C:\Users\User>C:\Users\User.platformio\penv\Scripts\esptool.exe --chip esp32 --port "COM3" --baud 921600 --before default-reset --after hard-reset write-flash -z --flash-mode dio --flash-freq 80m --flash-size detect 0x0 "D:\test\bootloader.bin" 0x8000 "D:\test\partitions.bin" 0xe000 "D:\test\boot_app0.bin" 0x10000 "D:\test\firmware.bin"

Esptool Output

C:\Users\User>C:\Users\User\.platformio\penv\Scripts\esptool.exe version
esptool v5.0.1
5.0.1

C:\Users\User>C:\Users\User\.platformio\penv\Scripts\esptool.exe --chip esp32 --port "COM3" --baud 921600 --before default-reset --after hard-reset write-flash -z --flash-mode dio --flash-freq 80m --flash-size detect 0x0 "D:\test\bootloader.bin" 0x8000 "D:\test\partitions.bin" 0xe000 "D:\test\boot_app0.bin" 0x10000 "D:\test\firmware.bin"
esptool v5.0.1
Serial port COM3:
Connecting.......

A fatal error occurred: Invalid head of packet (0x00): Possible serial noise or corruption.

More Information

Upload works seamlessly when used with ESP32 Dev Module based on CH340, or with Esptool 5.0.0-dev1.
Checked with two modules, different USB cables.

Esptool 5.0.1

C:\Users\User>C:\Users\User\.platformio\penv\Scripts\esptool.exe version
esptool v5.0.1
5.0.1

C:\Users\User>C:\Users\User\.platformio\penv\Scripts\esptool.exe --chip esp32 --port "COM3" --baud 921600 --before default-reset --after hard-reset write-flash -z --flash-mode dio --flash-freq 80m --flash-size detect 0x0 "D:\test\bootloader.bin" 0x8000 "D:\test\partitions.bin" 0xe000 "D:\test\boot_app0.bin" 0x10000 "D:\test\firmware.bin"
esptool v5.0.1
Serial port COM3:
Connecting.......

A fatal error occurred: Invalid head of packet (0x00): Possible serial noise or corruption.

Esptool 5.0.0.-dev1

C:\Users\User>C:\Users\User\.platformio\penv\Scripts\esptool.exe version
esptool.py v5.0.0-dev1
5.0.0-dev1

C:\Users\User>C:\Users\User\.platformio\penv\Scripts\esptool.exe --chip esp32 --port "COM3" --baud 921600 --before default-reset --after hard-reset write-flash -z --flash-mode dio --flash-freq 80m --flash-size detect 0x0 "D:\test\bootloader.bin" 0x8000 "D:\test\partitions.bin" 0xe000 "D:\test\boot_app0.bin" 0x10000 "D:\test\firmware.bin"
esptool.py v5.0.0-dev1
Connected to ESP32 on COM3:
Chip type:          ESP32-D0WD-V3 (revision v3.1)
Features:           Wi-Fi, BT, Dual Core + LP Core, 240MHz, Vref calibration in eFuse, Coding Scheme None
Crystal frequency:  40MHz
MAC:                d0:ef:76:46:60:6c

Stub flasher running.
Changing baud rate to 921600...
Changed.

Writing at 0x0006d3ff [█████░░░░░░░░░░░░░░░░░░░░░░░░░]  20.0% 163840/819568 bytes...
Writing at 0x00067780 [█████░░░░░░░░░░░░░░░░░░░░░░░░░]  18.0% 147456/819568 bytes...
Writing at 0x0005fc9b [████░░░░░░░░░░░░░░░░░░░░░░░░░░]  16.0% 131072/819568 bytes...
Writing at 0x00059978 [████░░░░░░░░░░░░░░░░░░░░░░░░░░]  14.0% 114688/819568 bytes...
Writing at 0x00053e5b [███░░░░░░░░░░░░░░░░░░░░░░░░░░░]  12.0% 98304/819568 bytes...
Writing at 0x00047204 [██░░░░░░░░░░░░░░░░░░░░░░░░░░░░]  10.0% 81920/819568 bytes...
Writing at 0x0003bbe9 [██░░░░░░░░░░░░░░░░░░░░░░░░░░░░]   8.0% 65536/819568 bytes...
Writing at 0x00033e73 [█░░░░░░░░░░░░░░░░░░░░░░░░░░░░░]   6.0% 49152/819568 bytes...
Writing at 0x0002ac1e [█░░░░░░░░░░░░░░░░░░░░░░░░░░░░░]   4.0% 32768/819568 bytes...
Writing at 0x0001d606 [░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░]   2.0% 16384/819568 bytes...
Writing at 0x00010000 [░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░]   0.0% 0/819568 bytes...

Other Steps to Reproduce

No response

I Have Read the Troubleshooting Guide

• I confirm I have read the troubleshooting guide.

[github-actions]

Hi @cniedzi! Please be aware that (1) the following suggestions are generated by a bot and haven't been fact-checked by Espressif Systems, (2) burning eFuses and enabling security features are irreversible operations and can damage your ESP32 device. We hope that this message will help you until an Espressif Engineer looks at your issue.

---

Thank you for the detailed report. The error message:

A fatal error occurred: Invalid head of packet (0x00): Possible serial noise or corruption.

is a known issue and is typically caused by one of the following, according to Espressif’s official troubleshooting documentation:

• The chip is not resetting into download mode. If the ESP32 is not in download mode, it may send unexpected data on the UART, resulting in this error.
• Poor quality or faulty USB cable.
• Electrical noise or interference, possibly from breadboards or poor connections.
• Power supply issues, especially if the USB-to-UART chip’s regulator cannot supply enough current.
• Serial port contention or configuration issues.

Recommended steps:

1. Check Download Mode:
   Ensure the ESP32 is properly entering download mode. If your board does not have reliable auto-reset circuitry, try manually resetting into download mode as described in the Manual Bootloader instructions.

2. Try a Different USB Cable:
   Even if the cable works with other devices, some cables can cause issues at higher baud rates or with certain USB-to-UART chips.

3. Reduce Baud Rate:
   Try lowering the baud rate (e.g., --baud 115200 or even --baud 9600) to see if the problem persists. High baud rates can be more susceptible to noise and timing issues.

4. Check Power Supply:
   Make sure your ESP32 is getting a stable 3.3V supply. Some USB-to-UART chips (like FTDI or CP2102) may not provide enough current, especially at high baud rates. If possible, try powering the ESP32 from a separate, stable 3.3V source.

5. Remove from Breadboard:
   If you are using a breadboard, try removing the ESP32 and connecting it directly, as breadboards can sometimes cause signal integrity issues.

6. Check for Serial Port Contention:
   Ensure no other software is accessing the same COM port (serial terminals, other IDEs, etc.).

7. Try Esptool 5.0.0-dev1:
   Since you mentioned that esptool 5.0.0-dev1 works but 5.0.1 does not, this could indicate a regression or compatibility issue in esptool 5.0.1 with your specific hardware setup. Consider opening an issue on the esptool GitHub with your findings, as this information will help the maintainers investigate further.

These steps are directly recommended in Espressif’s troubleshooting guide for this error. If none of these resolve the issue, please provide additional details or open an issue as suggested above so the Espressif team can assist further.
ESP32 Troubleshooting Guide

---

Summary:
This error is most often caused by download mode issues, USB cable quality, power supply, or serial port problems. Since the problem is specific to esptool 5.0.1 and CP2102, but not 5.0.0-dev1 or CH340, it may also be a regression in esptool. Please try the above steps and report your findings to the esptool maintainers for further investigation.

[Dzarda7]

Hi @cniedzi, I see that you are using some modified esptool from platformio. I am unable to reproduce your issue with esptool installed using pip. Can you please try to either install using pip as described here or just download binary from here and try it with official esptool? Thanks.

If the issue permits, please try to update drivers for the cp2102 using automatic update in Windows as described here, I encountered the similar issue before and this solved it. Thanks.

[cniedzi]

Hi @cniedzi, I see that you are using some modified esptool from platformio. I am unable to reproduce your issue with esptool installed using pip. Can you please try to either install using pip as described here or just download binary from here and try it with official esptool? Thanks.

If the issue permits, please try to update drivers for the cp2102 using automatic update in Windows as described here, I encountered the similar issue before and this solved it. Thanks.

Hi @Dzarda7, thanks for your reply!
I downloaded esptool from: here and unpacked it to D:\esptool-windows-amd64\.

The following command:
D:\esptool-windows-amd64\esptool.exe --chip esp32 --port "COM3" --baud 921600 --before default-reset --after hard-reset write-flash -z --flash-mode dio --flash-freq 80m --flash-size detect 0x0 "D:\test\bootloader.bin" 0x8000 "D:\test\partitions.bin" 0xe000 "D:\test\boot_app0.bin" 0x10000 "D:\test\firmware.bin"

still returns:

D:\>D:\esptool-windows-amd64\esptool.exe --chip esp32 --port "COM3" --baud 921600 --before default-reset --after hard-reset write-flash -z --flash-mode dio --flash-freq 80m --flash-size detect 0x0 "D:\test\bootloader.bin" 0x8000 "D:\test\partitions.bin" 0xe000 "D:\test\boot_app0.bin" 0x10000 "D:\test\firmware.bin"
esptool v5.0.1
Serial port COM3:
Connecting....

A fatal error occurred: Invalid head of packet (0x00): Possible serial noise or corruption.

I also downloaded 5.0.0 and 4.9.0.

Esptool 5.0.0 still doesn't work, while 4.9.0 flies:

D:\>D:\esptool-v4.9.0-windows-amd64\esptool.exe --chip esp32 --port "COM3" --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size detect 0x0 "D:\test\bootloader.bin" 0x8000 "D:\test\partitions.bin" 0xe000 "D:\test\boot_app0.bin" 0x10000 "D:\test\firmware.bin"
esptool.py v4.9.0
Serial port COM3
Connecting.....
Chip is ESP32-D0WD-V3 (revision v3.1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: d0:ef:76:46:60:6c
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Auto-detected Flash size: 4MB
Flash will be erased from 0x00000000 to 0x00005fff...
Flash will be erased from 0x00008000 to 0x00008fff...
Flash will be erased from 0x0000e000 to 0x0000ffff...
Flash will be erased from 0x00010000 to 0x00164fff...
Compressed 23696 bytes to 15164...
Wrote 23696 bytes (15164 compressed) at 0x00000000 in 0.3 seconds (effective 580.1 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 146...
Wrote 3072 bytes (146 compressed) at 0x00008000 in 0.0 seconds (effective 1355.5 kbit/s)...
Hash of data verified.
Compressed 8192 bytes to 47...
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.0 seconds (effective 1940.9 kbit/s)...
Hash of data verified.
Compressed 1396400 bytes to 819568...
Wrote 1396400 bytes (819568 compressed) at 0x00010000 in 11.1 seconds (effective 1003.4 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

PS. Windows update hasn't helped.

[Dzarda7]

Can you please try to lower the baudrate? It might be some hardware issue. You can try to find what caused the issue by cloning the esptool repository, installing it in editable mode using pip install -e <path_to_esptool> and running git bisect. This way you can find what change caused the issue.

[cniedzi]

I'm not super experienced with Git, so I'm not sure what to do next... :(

esptool.exe has been built.

PS C:\Users\Czarek\Documents\esptool\esptool> pip install --user -e .
Obtaining file:///C:/Users/Czarek/Documents/esptool/esptool
  Installing build dependencies ... done
  Checking if build backend supports build_editable ... done
  Getting requirements to build editable ... done
  Preparing editable metadata (pyproject.toml) ... done
Requirement already satisfied: bitstring!=4.2.0,>=3.1.6 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (4.3.1)
Requirement already satisfied: cryptography>=43.0.0 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (45.0.5)
Requirement already satisfied: pyserial>=3.3 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (3.5)
Requirement already satisfied: reedsolo<1.8,>=1.5.3 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (1.7.0)
Requirement already satisfied: PyYAML>=5.1 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (6.0.2)
Requirement already satisfied: intelhex in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (2.3.0)
Requirement already satisfied: rich_click in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (1.8.9)
Requirement already satisfied: click<8.2.0 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from esptool==5.0.1) (8.1.8)
Requirement already satisfied: colorama in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from click<8.2.0->esptool==5.0.1) (0.4.6)
Requirement already satisfied: bitarray<4.0,>=3.0.0 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from bitstring!=4.2.0,>=3.1.6->esptool==5.0.1) (3.5.2)
Requirement already satisfied: cffi>=1.14 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from cryptography>=43.0.0->esptool==5.0.1) (1.17.1)
Requirement already satisfied: pycparser in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from cffi>=1.14->cryptography>=43.0.0->esptool==5.0.1) (2.22)
Requirement already satisfied: rich>=10.7 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from rich_click->esptool==5.0.1) (14.1.0)
Requirement already satisfied: typing_extensions>=4 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from rich_click->esptool==5.0.1) (4.14.1)
Requirement already satisfied: markdown-it-py>=2.2.0 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from rich>=10.7->rich_click->esptool==5.0.1) (3.0.0)
Requirement already satisfied: pygments<3.0.0,>=2.13.0 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from rich>=10.7->rich_click->esptool==5.0.1) (2.19.2)
Requirement already satisfied: mdurl~=0.1 in c:\users\czarek\appdata\local\programs\python\python313\lib\site-packages (from markdown-it-py>=2.2.0->rich>=10.7->rich_click->esptool==5.0.1) (0.1.2)
Building wheels for collected packages: esptool
  Building editable for esptool (pyproject.toml) ... done
  Created wheel for esptool: filename=esptool-5.0.1-0.editable-py3-none-any.whl size=11437 sha256=c65adb96db53956b219698286a727c85725bc008fb1a4b1fd45448e880442fe3
  Stored in directory: C:\Users\Czarek\AppData\Local\Temp\pip-ephem-wheel-cache-04ddseqx\wheels\8a\85\5e\19cb83b6f20982baea4e173a51c25bf8aefdd3e30298d37758
Successfully built esptool
Installing collected packages: esptool
  Attempting uninstall: esptool
    Found existing installation: esptool 5.0.1
    Uninstalling esptool-5.0.1:
      Successfully uninstalled esptool-5.0.1
  WARNING: The scripts esp_rfc2217_server.exe, espefuse.exe, espsecure.exe and esptool.exe are installed in 'C:\Users\Czarek\AppData\Roaming\Python\Python313\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed esptool-5.0.1

[Dzarda7]

This does not build the exe, this installs the esptool as a python package so you can run it now as esptool.py <some_command>. Now you need to be in the esptool folder you installed using pip install --user -e .. Here is a nice example of how to use git bisect. You basically run git bisect start, then specify good and bad commit. (for latest commit git bisect bad 0f32306551ae35fbaf2a6ee4a28e56d59f41e1ae, for release 4.9.0dev5 commit git bisect good a32988e2d5f02845ce16e22022f5b64368f12572). Now git will automatically go through the history of changes and let you find the place where it stopped working. After bad and good is specified, you run esptool.py flash_id, if it works, you write git bisect good, if not git bisect bad. After few steps, git will print the commit which caused the issue.

[cniedzi]

This does not build the exe, this installs the esptool as a python package so you can run it now as esptool.py <some_command>. Now you need to be in the esptool folder you installed using pip install --user -e .. Here is a nice example of how to use git bisect. You basically run git bisect start, then specify good and bad commit. (for latest commit git bisect bad 0f32306551ae35fbaf2a6ee4a28e56d59f41e1ae, for release 4.9.0dev5 commit git bisect good a32988e2d5f02845ce16e22022f5b64368f12572). Now git will automatically go through the history of changes and let you find the place where it stopped working. After bad and good is specified, you run esptool.py flash_id, if it works, you write git bisect good, if not git bisect bad. After few steps, git will print the commit which caused the issue.

Thx, will try!

[cniedzi]

@Dzarda7, I got it :) but it is 4.8.1... strange, because the 4.9.0 from the official download works for me.

D:\xxx>git bisect bad
0b3460fa12756291f187949d2e6ff15fe2ac9c2c is the first bad commit
commit 0b3460fa12756291f187949d2e6ff15fe2ac9c2c (HEAD)
Author: Jaroslav Burian <jaroslav.burian@espressif.com>
Date:   Fri Jun 20 16:29:41 2025 +0200

    fix: enable ESP32-P4 ECO5 chip detection

    Register was read in order to detect SDM, this cannot be done with new
    ESP32-P4 ECO5, because it has different address space and crashes
    when trying to read current magic address. This also improves detection
    for ESP32-S2 as is is only chip that has SDM support and is detected
    by reading magic address.

 esptool/cmds.py            |  56 ++++++----------------
 esptool/loader.py          | 113 ++++++++++++++++++++++++++++++++-------------
 esptool/targets/esp8266.py |   2 +
 3 files changed, 98 insertions(+), 73 deletions(-)

[Dzarda7]

The version report might be incorrect in the commits in between releases. This one is not present in v5.0.0dev1, the first release where this commit is present is v5.0.0. Thanks for the investigation. I will try to reproduce it and fix it. The issue is present only on cp2102 right? I encountered this exact issue with this commit, but it was a driver issue. Can you please try to run following commands on the not working version (or commit) and paste the output here:

esptool.py --trace flash_id
esptool.py --trace --chip esp32 flash_id

[cniedzi]

The issue is present only on cp2102 right?

Yes, it works well on CH340 board.

esptool.py --trace flash_id

D:\xxx>esptool.py --trace flash_id
Warning: DEPRECATED: 'esptool.py' is deprecated. Please use 'esptool' instead. The '.py' suffix will be removed in a future major release.
Warning: Deprecated: Command 'flash_id' is deprecated. Use 'flash-id' instead.
esptool v5.0.1
Found 1 serial ports...
Serial port COM3:
Connecting...
  TRACE +0.000   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.108   No serial data received.
.
  TRACE +0.052   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.104   No serial data received.
.
  TRACE +0.053   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.103   No serial data received.
.
  TRACE +0.053   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.102   No serial data received.
.
  TRACE +0.053   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.007   Read 1 bytes:         c0
  TRACE +0.000   Read 31 bytes:
    0108040020555555 00000000c0c00108 | .... UUU........
    0400205555550000 0000c0c0010804   | .. UUU.........
  TRACE +0.000   Received full packet: 010804002055555500000000
  TRACE +0.001   Received full packet: 010804002055555500000000
  TRACE +0.002   Read 32 bytes:
    0020555555000000 00c0c00108040020 | . UUU..........
    55555500000000c0 c001080400205555 | UUU.......... UU
  TRACE +0.000   Received full packet: 010804002055555500000000
  TRACE +0.001   Received full packet: 010804002055555500000000
  TRACE +0.002   Read 32 bytes:
    5500000000c0c001 0804002055555500 | U.......... UUU.
    000000c0c0010804 0020555555000000 | ......... UUU...
  TRACE +0.000   Received full packet: 010804002055555500000000
  TRACE +0.001   Received full packet: 010804002055555500000000
  TRACE +0.001   Read 16 bytes:        00c0c0010804002055555500000000c0
  TRACE +0.000   Received full packet: 010804002055555500000000
  TRACE +0.001   Received full packet: 010804002055555500000000

Detecting chip type...
  TRACE +0.002   --- Cmd GET_SECURITY_INFO (0x14) | data_len 0 | wait_response 1 | timeout 3.000 | data  ---
  TRACE +0.000   Write 10 bytes:       c00014000000000000c0
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 31 bytes:
    0108040020555555 01050000c0c00108 | .... UUU........
    0400205555550105 0000c0c0010804   | .. UUU.........
  TRACE +0.000   Received full packet: 010804002055555501050000

  TRACE +0.202   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 00100040 ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000000100040c0
  TRACE +0.000   Read 80 bytes:
    0020555555010500 00c0c00108040020 | . UUU..........
    55555501050000c0 c001080400205555 | UUU.......... UU
    5501050000c0c001 0804002055555501 | U.......... UUU.
    050000c0c0010804 0020555555010500 | ......... UUU...
    00c0c00108040020 55555501050000c0 | ....... UUU.....
  TRACE +0.000   Read invalid data:
    0020555555010500 00c0c00108040020 | . UUU..........
    55555501050000c0 c001080400205555 | UUU.......... UU
    5501050000c0c001 0804002055555501 | U.......... UUU.
    050000c0c0010804 0020555555010500 | ......... UUU...
    00c0c00108040020 55555501050000c0 | ....... UUU.....
  TRACE +0.000   Remaining data in serial buffer:
 Autodetection failed, trying again...
Connecting...
  TRACE +0.154   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.105   No serial data received.
.
  TRACE +0.053   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.007   Read 1 bytes:         c0
  TRACE +0.000   Read 31 bytes:
    0108040012205555 00000000c0c00108 | ..... UU........
    0400122055550000 0000c0c0010804   | ... UU.........
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.002   Received full packet: 010804001220555500000000
  TRACE +0.002   Read 32 bytes:
    0012205555000000 00c0c00108040012 | .. UU...........
    20555500000000c0 c001080400122055 |  UU........... U
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.001   Received full packet: 010804001220555500000000
  TRACE +0.001   Read 32 bytes:
    5500000000c0c001 0804001220555500 | U........... UU.
    000000c0c0010804 0012205555000000 | .......... UU...
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.002   Received full packet: 010804001220555500000000
  TRACE +0.001   Read 16 bytes:        00c0c0010804001220555500000000c0
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.001   Received full packet: 010804001220555500000000

Detecting chip type...
  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 00100040 ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000000100040c0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a0400831df00000000000c0
  TRACE +0.000   Received full packet: 010a0400831df00000000000
 ESP32
Connected to ESP32 on COM3:

  TRACE +0.000   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 0ca0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000000ca0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a040000a2000000000000c0
  TRACE +0.000   Received full packet: 010a040000a2000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 0ca0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000000ca0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.001   Read 13 bytes:        010a040000a2000000000000c0
  TRACE +0.000   Received full packet: 010a040000a2000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 14a0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000014a0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a04000000100100000000c0
  TRACE +0.000   Received full packet: 010a04000000100100000000

  TRACE +0.002   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 7c60f63f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000007c60f63fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a04000020049600000000c0
  TRACE +0.000   Received full packet: 010a04000020049600000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 14a0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000014a0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a04000000100100000000c0
  TRACE +0.000   Received full packet: 010a04000000100100000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 0ca0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000000ca0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a040000a2000000000000c0
  TRACE +0.000   Received full packet: 010a040000a2000000000000
Chip type:          ESP32-D0WD-V3 (revision v3.1)

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 0ca0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000000ca0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a040000a2000000000000c0
  TRACE +0.000   Received full packet: 010a040000a2000000000000

  TRACE +0.002   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 0ca0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000000ca0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a040000a2000000000000c0
  TRACE +0.000   Received full packet: 010a040000a2000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 10a0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000010a0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a04003303000000000000c0
  TRACE +0.000   Received full packet: 010a04003303000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 18a0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000018a0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a04000400000000000000c0
  TRACE +0.000   Received full packet: 010a04000400000000000000
Features:           Wi-Fi, BT, Dual Core + LP Core, 240MHz, Vref calibration in eFuse, Coding Scheme None

  TRACE +0.002   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 1400f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000001400f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a04006001000000000000c0
  TRACE +0.000   Received full packet: 010a04006001000000000000
Crystal frequency:  40MHz

  TRACE +0.002   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 08a0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000008a0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a0400efd0ac0000000000c0
  TRACE +0.000   Received full packet: 010a0400efd0ac0000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 04a0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000004a0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010a04006c60467600000000c0
  TRACE +0.000   Received full packet: 010a04006c60467600000000
MAC:                d0:ef:76:46:60:6c

Uploading stub flasher...

  TRACE +0.002   --- Cmd MEM_BEGIN (0x05) | data_len 16 | wait_response 1 | timeout 3.000 | data 880d0000010000000018000000e00b40 ---
  TRACE +0.000   Write 26 bytes:
    c000051000000000 00880d0000010000 | ................
    000018000000e00b 40c0             | ........@.
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010504006c60467600000000c0
  TRACE +0.000   Received full packet: 010504006c60467600000000

  TRACE +0.002   --- Cmd MEM_DATA (0x07) | data_len 3480 | wait_response 1 | timeout 3.000 | data
    880d000000000000 0000000000000000 | ................
    0800f43f1c00f43f 0000f43f00c0fc3f | ...?...?...?...?
    1000f43f36410081 faff51faffc02000 | ...?6A....Q... .
    6808c02000722500 7070749cd741f6ff | h.. .r%.ppt..A..
    81f7ffc02000a804 82280072c7ffa0a0 | .... ....(.r....
    74e008005687fec6 f5ff000081f1ffc0 | t...V...........
    200069081df00000 a0ebfd3f186bfd3f |  .i........?.k.?
    58abfd3fa4ebfd3f 98ebfd3f9cebfd3f | X..?...?...?...?
    364100b1f9ff20a0 7410112025cb0096 | 6A.... .t.. %...
    da0491faff81f8ff c02000b808c02000 | ......... .... .
    8219008080f41bc8 c02000c259008a8b | ......... ..Y...
    c02000a24800c020 0082190092a04080 | . ..H.. ......@.
    80f492d940979847 91ecff81e8ffc020 | ....@..G.......
    00c809a1e8ffb1e6 ff879c1806020000 | ................
    7ce8871ae2c60900 c02000890ac02000 | |........ .... .
    b909460200c02000 b90ac02000890992 | ..F... .... ....
    a18492d97f9a8892 a000c02000925800 | ........... ..X.
    1df00000f820f43f f830f43f36410091 | ..... .?.0.?6A..
    fdffc02000880980 80245648ff91faff | ... .....$VH....
    c020008809808024 5648ff1df0000000 | . .....$VH......
    1020f43f0020f43f 364100101120e5fc | . .?. .?6A... ..
    ff81fbff0c09c020 0099080c1a91f9ff | ....... ........
    50aa01c02000a909 c02000a809567aff | P... .... ...Vz.
    c0200028087cf880 22302020041df000 | . .(.|.."0  ....
    36410010112025fc ff166aff81eeff0c | 6A... %...j.....
    19209901c0200099 08c0200098085679 | . ... .... ...Vy
    ff1df0000c40fd3f 0420f43f36410061 | .....@.?. .?6A.a
    fdff584616850610 1120e5f8ff16fa05 | ..XF..... ......
    0cf872a00057a80b 72260270703470f7 | ..r..W..r&.pp4p.
    40707541101120a5 faff101120e5f3ff | @puA.. ..... ...
    98260c1a40891180 aa018c370c1a90aa | .&..@......7....
    01b1edff80881180 8841c02000890b81 | .........A. ....
    d1ffc02000a26800 c02000a808567aff | ... ..h.. ...Vz.
    0c181c0a708a9380 55c08a9959469926 | ....p...U...YF.&
    1df000002c920040 364100a2a0c081fd | ....,..@6A......
    ffe008001df00000 36410082a0c0ad02 | ........6A......
    879211a2a0db81f7 ffe00800a2a0dc46 | ...............F
    040000000082a0db 87920881f2ffe008 | ................
    00a2a0dd81f0ffe0 08001df03641003a | ............6A.:
    32c6020000a20200 1b22101120a5fbff | 2........".. ...
    3792f11df0000000 7cda0540d82e0640 | 7.......|..@...@
    9cda05401cdb0540 362121a2d1100c16 | ...@...@6!!.....
    81faffe008004066 1186090000607363 | ......@f.....`sc
    cd07bd01ad0281f5 ffe00800a0a074fc | ..............t.
    4acd07bd01a2d110 81f2ffe008007a22 | J.............z"
    7033c05663fd5c83 32d3103a31b2d110 | p3.Vc.\.2..:1...
    ad0381ecffe00800 1c0bad03101120e5 | .............. .
    f7ff0c0286000022 a0631df058100000 | .......".c..X...
    7c10000078100000 7410000070100000 | |...x...t...p...
    fc670040d0920040 0868004036412181 | .g.@...@.h.@6A!.
    fbff2c0a1a884908 81f8ff1a8859080c | ..,...I......Y..
    0852d11082651a81 f6ffe0080091f3ff | .R...e..........
    0c181a9998094088 1197b80286420050 | ......@......B.P
    a52081cdffe00800 91ebff82a06c82d8 | . ...........l..
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    70e2fa3f48240640 f022064036610010 | p..?H$.@.".@6a..
    1120a5caff10a120 81fbffe008002d0a | . ..... ......-.
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    81d6ff91d7ff0c0a 060100a90882c804 | ................
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    2c0a812dffe00800 81d6ffe0080081c0 | ,..-............
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    65b1ff0c8ba2c110 10112025b5ff8207 | e......... %....
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    0c16971802c65f00 f877e867d857c847 | ......_..w.g.W.G
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    83c658000c162648 02065200c1f6fe7c | ..X...&H..R....|
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    10908820a827c020 00890cc1effec020 | ... .'. .......
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    0cc1e7fec0200088 0cb08810908820c0 | ..... ........ .
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    90340c0562a0c056 d90e8084418b67c6 | .4..b..V....A.g.
    0b00a83689c181ec fee008009826a816 | ...6.........&..
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    c6108735cc461e00 2648760c0562a0c0 | ...5.F..&Hv..b..
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  TRACE +0.001   Write 3583 bytes:
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    dd9792d20c188903 22a0dbdd1df0c0   | ........"......
  TRACE +0.316   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010704006c60467600000000c0
  TRACE +0.000   Received full packet: 010704006c60467600000000

  TRACE +0.002   --- Cmd MEM_BEGIN (0x05) | data_len 16 | wait_response 1 | timeout 3.000 | data 9c0000000100000000180000a8ebfd3f ---
  TRACE +0.000   Write 26 bytes:
    c000051000000000 009c000000010000 | ................
    0000180000a8ebfd 3fc0             | ........?.
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010504006c60467600000000c0
  TRACE +0.000   Received full packet: 010504006c60467600000000

  TRACE +0.001   --- Cmd MEM_DATA (0x07) | data_len 172 | wait_response 1 | timeout 3.000 | data
    9c00000000000000 0000000000000000 | ................
    0cc0fc3fdde70b40 73e80b402bed0b40 | ...?...@s..@+..@
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    94e90b40eaea0b40 6ae80b40bbe80b40 | ...@...@j..@...@
    f5e80b404ee90b40 7ce80b409ceb0b40 | ...@N..@|..@...@
    efec0b40aae60b40 0fed0b40aae60b40 | ...@...@...@...@
    aae60b40aae60b40 aae60b40aae60b40 | ...@...@...@...@
    aae60b40aae60b40 aae60b404beb0b40 | ...@...@...@K..@
    aae60b401eec0b40 efec0b40         | ...@...@...@ ---
  TRACE +0.000   Write 183 bytes:
    c00007ac005a0000 009c000000000000 | .....Z..........
    0000000000000000 000cdbdcfc3fdde7 | .............?..
    0b4073e80b402bed 0b40f5e80b4096e8 | .@s..@+..@...@..
    0b40f5e80b404ee9 0b4053ea0b40c9ea | .@...@N..@S..@..
    0b406eea0b4089e7 0b40ffe90b4048ea | .@n..@...@...@H.
    0b406ce90b40eaea 0b4094e90b40eaea | .@l..@...@...@..
    0b406ae80b40bbe8 0b40f5e80b404ee9 | .@j..@...@...@N.
    0b407ce80b409ceb 0b40efec0b40aae6 | .@|..@...@...@..
    0b400fed0b40aae6 0b40aae60b40aae6 | .@...@...@...@..
    0b40aae60b40aae6 0b40aae60b40aae6 | .@...@...@...@..
    0b40aae60b404beb 0b40aae60b401eec | .@...@K..@...@..
    0b40efec0b40c0                    | .@...@.
  TRACE +0.018   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010704006c60467600000000c0
  TRACE +0.000   Received full packet: 010704006c60467600000000
Running stub flasher...

  TRACE +0.002   --- Cmd MEM_END (0x06) | data_len 8 | wait_response 1 | timeout 0.200 | data 00000000e0e50b40 ---
  TRACE +0.000   Write 18 bytes:
    c000060800000000 0000000000e0e50b | ................
    40c0                              | @.
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 13 bytes:        010604006c60467600000000c0
  TRACE +0.000   Received full packet: 010604006c60467600000000
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 5 bytes:         4f484149c0
  TRACE +0.000   Received full packet: 4f484149
Stub flasher running.


  TRACE +0.000   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 1c20f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000001c20f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200400000800000c0
  TRACE +0.000   Received full packet: 010a0200400000800000

  TRACE +0.002   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 2420f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000002420f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200000000700000c0
  TRACE +0.000   Received full packet: 010a0200000000700000

  TRACE +0.002   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 2c20f43f17000000ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 002c20f43f170000 | ........., .?...
    00ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 1c20f43f00000090ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 001c20f43f000000 | .......... .?...
    90ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.002   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 2420f43f9f000070ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 002420f43f9f0000 | .........$ .?...
    70ffffffff000000 00c0             | p.........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 8020f43f00000000ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 008020f43f000000 | .......... .?...
    00ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 0020f43f00000400ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 000020f43f000004 | .......... .?...
    00ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.002   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 0020f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000000020f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200000000000000c0
  TRACE +0.000   Received full packet: 010a0200000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 8020f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000008020f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a02005e4016000000c0
  TRACE +0.000   Received full packet: 010a02005e4016000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 1c20f43f40000080ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 001c20f43f400000 | .......... .?@..
    80ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 2420f43f00000070ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 002420f43f000000 | .........$ .?...
    70ffffffff000000 00c0             | p.........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 1c20f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000001c20f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200400000800000c0
  TRACE +0.000   Received full packet: 010a0200400000800000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 2420f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000002420f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200000000700000c0
  TRACE +0.000   Received full packet: 010a0200000000700000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 2c20f43f07000000ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 002c20f43f070000 | ........., .?...
    00ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 2020f43f0700005cffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 002020f43f070000 | .........  .?...
    5cffffffff000000 00c0             | \.........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 1c20f43f000000f0ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 001c20f43f000000 | .......... .?...
    f0ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 2420f43f5a000070ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 002420f43f5a0000 | .........$ .?Z..
    70ffffffff000000 00c0             | p.........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 0420f43f00100000ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 000420f43f001000 | .......... .?...
    00ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 8020f43f00000000ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 008020f43f000000 | .......... .?...
    00ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 0020f43f00000400ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 000020f43f000004 | .......... .?...
    00ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 0020f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000000020f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200000000000000c0
  TRACE +0.000   Received full packet: 010a0200000000000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 8020f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000008020f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a02005e0000000000c0
  TRACE +0.000   Received full packet: 010a02005e0000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 1c20f43f40000080ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 001c20f43f400000 | .......... .?@..
    80ffffffff000000 00c0             | ..........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000

  TRACE +0.001   --- Cmd WRITE_REG (0x09) | data_len 16 | wait_response 1 | timeout 3.000 | data 2420f43f00000070ffffffff00000000 ---
  TRACE +0.000   Write 26 bytes:
    c000091000000000 002420f43f000000 | .........$ .?...
    70ffffffff000000 00c0             | p.........
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        01090200000000000000c0
  TRACE +0.000   Received full packet: 01090200000000000000
Flash Memory Information:
=========================
Manufacturer: 5e
Device: 4016
Detected flash size: 4MB

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 7480f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000007480f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a02000000a0020000c0
  TRACE +0.000   Received full packet: 010a02000000a0020000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 10a0f53f ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000010a0f53fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200330300000000c0
  TRACE +0.000   Received full packet: 010a0200330300000000

  TRACE +0.001   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 3840f43f ---
  TRACE +0.000   Write 14 bytes:       c0000a0400000000003840f43fc0
  TRACE +0.003   Read 1 bytes:         c0
  TRACE +0.000   Read 11 bytes:        010a0200030000000000c0
  TRACE +0.000   Received full packet: 010a0200030000000000
Flash voltage set by a strapping pin: 3.3V

Hard resetting via RTS pin...

esptool.py --trace --chip esp32 flash_id

D:\xxx>esptool.py --trace --chip esp32 flash_id
Warning: DEPRECATED: 'esptool.py' is deprecated. Please use 'esptool' instead. The '.py' suffix will be removed in a future major release.
Warning: Deprecated: Command 'flash_id' is deprecated. Use 'flash-id' instead.
esptool v5.0.1
Found 1 serial ports...
Serial port COM3:
Connecting...
  TRACE +0.000   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.105   No serial data received.
.
  TRACE +0.053   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.103   No serial data received.
.
  TRACE +0.053   --- Cmd SYNC (0x08) | data_len 36 | wait_response 1 | timeout 0.100 | data
    0707122055555555 5555555555555555 | ... UUUUUUUUUUUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    55555555                          | UUUU ---
  TRACE +0.000   Write 46 bytes:
    c000082400000000 0007071220555555 | ...$........ UUU
    5555555555555555 5555555555555555 | UUUUUUUUUUUUUUUU
    5555555555555555 5555555555c0     | UUUUUUUUUUUUU.
  TRACE +0.007   Read 1 bytes:         c0
  TRACE +0.000   Read 31 bytes:
    0108040012205555 00000000c0c00108 | ..... UU........
    0400122055550000 0000c0c0010804   | ... UU.........
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.002   Received full packet: 010804001220555500000000
  TRACE +0.001   Read 32 bytes:
    0012205555000000 00c0c00108040012 | .. UU...........
    20555500000000c0 c001080400122055 |  UU........... U
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.001   Received full packet: 010804001220555500000000
  TRACE +0.001   Read 32 bytes:
    5500000000c0c001 0804001220555500 | U........... UU.
    000000c0c0010804 0012205555000000 | .......... UU...
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.001   Received full packet: 010804001220555500000000
  TRACE +0.001   Read 16 bytes:        00c0c0010804001220555500000000c0
  TRACE +0.000   Received full packet: 010804001220555500000000
  TRACE +0.001   Received full packet: 010804001220555500000000


  TRACE +0.001   --- Cmd GET_SECURITY_INFO (0x14) | data_len 0 | wait_response 1 | timeout 3.000 | data  ---
  TRACE +0.000   Write 10 bytes:       c00014000000000000c0
  TRACE +0.004   Read 1 bytes:         c0
  TRACE +0.000   Read 31 bytes:
    0108040012205555 01050000c0c00108 | ..... UU........
    0400122055550105 0000c0c0010804   | ... UU.........
  TRACE +0.000   Received full packet: 010804001220555501050000

  TRACE +0.202   --- Cmd READ_REG (0x0a) | data_len 4 | wait_response 1 | timeout 3.000 | data 00100040 ---
  TRACE +0.000   Write 14 bytes:       c0000a04000000000000100040c0
  TRACE +0.000   Read 80 bytes:
    0012205555010500 00c0c00108040012 | .. UU...........
    20555501050000c0 c001080400122055 |  UU........... U
    5501050000c0c001 0804001220555501 | U........... UU.
    050000c0c0010804 0012205555010500 | .......... UU...
    00c0c00108040012 20555501050000c0 | ........ UU.....
  TRACE +0.000   Read invalid data:
    0012205555010500 00c0c00108040012 | .. UU...........
    20555501050000c0 c001080400122055 |  UU........... U
    5501050000c0c001 0804001220555501 | U........... UU.
    050000c0c0010804 0012205555010500 | .......... UU...
    00c0c00108040012 20555501050000c0 | ........ UU.....
  TRACE +0.000   Remaining data in serial buffer:
COM3 failed to connect: Invalid head of packet (0x00): Possible serial noise or corruption.

A fatal error occurred: Could not connect to an Espressif device on any of the 1 available serial ports.

[me-no-dev]

@Dzarda7 chiming in to say that esptool was installed from Arduino. We used the dev1 version initially to add support for the new C5 and then updated to 5.0.1 for the latest release. Binaries are built by your team. Looking forward to this getting fixed and new version released that we can push to our users in next Arduino version.