ESP32 S2 Mini / Adafruit ESPTool

[TobiasPSP]

ESP32 S2 Mini uses dual UART USB and changes active USB port when switching to firmware upload mode. ESP Web Tool breaks with this board:

Connecting via Web Serial works well, selection menu shows "ESP32-S2" (when in firmware upload mode), else "TinyUSB".

"Prepare for First Use" and "INSTALL" both raise "Failed to initialize" after a few seconds of spinning wheel.

Browser-based "Adafruit ESPTool" (https://adafruit.github.io/Adafruit_WebSerial_ESPTool/) works like a charm. Apparently, this tool correctly handles the S2 Mini.

I'd like to either

a) understand how "Prepare For First Use" works and where the ESP Web Tools gets the four bin files that are mentioned in its manifest so I can use the Adafruit tool to provision S2 Mini with these files in the same way that "Prepare For First Use" would do if it worked correctly with S2 Mini.
b) better yet, get the ESP Web Tools to work with S2 Mini by adopting the technique used by Adafruit ESPTool

I cannot create ESPHome configuration and download its firmware, then upload with the Adafruit tool (which does works beautifully) since I need to provision 100s of boards. I need a generic reusable firmware that triggers "ADOPT" in ESPHome.

Any help or suggestion greatly appreciated. Many thanks.

[EmileSpecialProducts]

This is linked to the #375 and esptool-js issue.
I have same problem that the 10.0.1 will not work on the WEMOS LOLIN S2.
But will work on the 8.0.6 version.
You can find my project Turtle-ESP-mouse-jiggler
This also has a script for platformIO to create the Bin files.

Consol log output:

ESP Web Tools 10.0.1 by Nabu Casa; https://esphome.github.io/esp-web-tools/
install-dialog-BWZCBYvU.js?module:477 Initializing Improv Serial
install-dialog-BWZCBYvU.js?module:477 Starting read loop
install-dialog-BWZCBYvU.js?module:477 Writing to stream: [0x49, 0x4D, 0x50, 0x52, 0x4F, 0x56, 0x01, 0x03, 0x02, 0x02, 0x00, 0xE5, 0x0A]
install-dialog-BWZCBYvU.js?module:477 Finished read loop
install-dialog-BWZCBYvU.js?module:807 Improv initialization failed. Error: Improv Wi-Fi Serial not detected
    at install-dialog-BWZCBYvU.js?module:477:1355
_initialize @ install-dialog-BWZCBYvU.js?module:807
await in _initialize
firstUpdated @ install-dialog-BWZCBYvU.js?module:807
_$AE @ styles-ChWDJ3ue.js?module:1
performUpdate @ styles-ChWDJ3ue.js?module:1
scheduleUpdate @ styles-ChWDJ3ue.js?module:1
_$ET @ styles-ChWDJ3ue.js?module:1
await in _$ET
requestUpdate @ styles-ChWDJ3ue.js?module:1
_$Ev @ styles-ChWDJ3ue.js?module:1
A @ styles-ChWDJ3ue.js?module:1
lt @ styles-ChWDJ3ue.js?module:1
Vs @ install-dialog-BWZCBYvU.js?module:477
e @ install-button.js?module:1
await in e
(anonymous) @ install-button.js?module:1Understand this error
install-dialog-BWZCBYvU.js?module:477 esptool.js
install-dialog-BWZCBYvU.js?module:477 Serial port WebSerial VendorID 0x303a ProductID 0x2
install-dialog-BWZCBYvU.js?module:477 Connecting...
install-dialog-BWZCBYvU.js?module:477 .
install-dialog-BWZCBYvU.js?module:477 

install-dialog-BWZCBYvU.js?module:477 Detecting chip type... 
install-dialog-BWZCBYvU.js?module:477 ESP32-S2
install-dialog-BWZCBYvU.js?module:477 Chip is ESP32-S2FH32
install-dialog-BWZCBYvU.js?module:477 Features: Wi-Fi,Embedded 4MB Flash
install-dialog-BWZCBYvU.js?module:477 Crystal is 40MHz
install-dialog-BWZCBYvU.js?module:477 MAC: 80:65:99:eb:74:06
install-dialog-BWZCBYvU.js?module:477 Uploading stub...
install-dialog-BWZCBYvU.js?module:807 Error: Timeout
    at Cs.read (install-dialog-BWZCBYvU.js?module:477:67134)
    at async qs.readPacket (install-dialog-BWZCBYvU.js?module:477:106260)
    at async qs.checkCommand (install-dialog-BWZCBYvU.js?module:477:111107)
    at async qs.memBlock (install-dialog-BWZCBYvU.js?module:477:111799)
    at async qs.runStub (install-dialog-BWZCBYvU.js?module:477:119077)
    at async qs.main (install-dialog-BWZCBYvU.js?module:477:120783)
    at async install-dialog-BWZCBYvU.js?module:807:3522
(anonymous) @ install-dialog-BWZCBYvU.js?module:807
await in (anonymous)
_confirmInstall @ install-dialog-BWZCBYvU.js?module:807
await in _confirmInstall
handleEvent @ styles-ChWDJ3ue.js?module:1Understand this error
install-dialog-BWZCBYvU.js?module:807 Uncaught (in promise) InvalidStateError: Failed to execute 'open' on 'SerialPort': The port is already open.
    at install-dialog-BWZCBYvU.js?module:807:6548
(anonymous) @ install-dialog-BWZCBYvU.js?module:807
setTimeout
(anonymous) @ install-dialog-BWZCBYvU.js?module:89
_e @ install-dialog-BWZCBYvU.js?module:89
(anonymous) @ install-dialog-BWZCBYvU.js?module:807
n @ install-dialog-BWZCBYvU.js?module:807
(anonymous) @ install-dialog-BWZCBYvU.js?module:807
await in (anonymous)
_confirmInstall @ install-dialog-BWZCBYvU.js?module:807
await in _confirmInstall
handleEvent @ styles-ChWDJ3ue.js?module:1Understand this error

Consollog output of Version 8.0.6

Try hard reset.
connect-f67814ca.js?module:488 Chip type ESP32-S2
connect-f67814ca.js?module:488 Uploading stub...
connect-f67814ca.js?module:488 Running stub...
connect-f67814ca.js?module:488 Stub is now running...
connect-f67814ca.js?module:488 Detecting Flash Size
connect-f67814ca.js?module:488 FlashId: 0x164020
connect-f67814ca.js?module:488 Flash Manufacturer: 20
connect-f67814ca.js?module:488 Flash Device: 4016
connect-f67814ca.js?module:488 Auto-detected Flash size: 4MB
connect-f67814ca.js?module:488 Image header, Magic=0xE9, FlashMode=0x02, FlashSizeFreq=0x20
connect-f67814ca.js?module:488 Writing data with filesize: 13648. Compressed Size: 9597
connect-f67814ca.js?module:488 Took 81ms to write 9597 bytes
connect-f67814ca.js?module:488 Erase size 0, blocks 0, block size 0x4000, offset 0x0000, encrypted no
connect-f67814ca.js?module:488 Image header, Magic=0xAA, FlashMode=0x01, FlashSizeFreq=0x02
connect-f67814ca.js?module:488 Writing data with filesize: 3072. Compressed Size: 146
connect-f67814ca.js?module:488 Took 13ms to write 146 bytes
connect-f67814ca.js?module:488 Erase size 0, blocks 0, block size 0x4000, offset 0x0000, encrypted no
connect-f67814ca.js?module:488 Image header, Magic=0x01, FlashMode=0x00, FlashSizeFreq=0x00
connect-f67814ca.js?module:488 Writing data with filesize: 8192. Compressed Size: 47
connect-f67814ca.js?module:488 Took 12ms to write 47 bytes
connect-f67814ca.js?module:488 Erase size 0, blocks 0, block size 0x4000, offset 0x0000, encrypted no
connect-f67814ca.js?module:488 Image header, Magic=0xE9, FlashMode=0x02, FlashSizeFreq=0x20
connect-f67814ca.js?module:488 Writing data with filesize: 279376. Compressed Size: 161665
connect-f67814ca.js?module:488 Took 2611ms to write 161665 bytes
connect-f67814ca.js?module:488 Erase size 0, blocks 0, block size 0x4000, offset 0x0000, encrypted no
connect-f67814ca.js?module:488 DISCONNECT
connect-f67814ca.js?module:488 Finished read loop
connect-f67814ca.js?module:488 HARD RESET
connect-f67814ca.js?module:488 Try hard reset.
connect-f67814ca.js?module:488 Initializing Improv Serial
connect-f67814ca.js?module:488 Starting read loop
connect-f67814ca.js?module:488 Writing to stream: [0x49, 0x4D, 0x50, 0x52, 0x4F, 0x56, 0x01, 0x03, 0x02, 0x02, 0x00, 0xE5, 0x0A]
connect-f67814ca.js?module:488 Finished read loop

[spuder]

Thank you for your workaround. I've also confirmed that I'm unable to flash any Wemos D1 Mini S2 using version 9.x or 10.x of esp-web-tools.

Downgrading to 8.0.6 is a good workaround.