Is YB-ESP32-S3-ETH a supported hardware platform?

[sauerbi]

Hi folks,

thanks for the great work with OpenDTU-OnBattery. I have an installation feeding an HM-1500 directly from a 16kWh battery and it works great!

Only disadvantage is that the WLAN on the ESP-S3-WROOM-32 has some trouble keeping the connection to my router because of the distance. So I tried to install OpenDTU-4MB-factory image on an
with 4MB of flash (and NO PSRam!) , but with no success.

I ran into several problems:

1. the ESP-tool comments the installation with: "Warning: Image file at 0x0 doesn't look like an image file, so not changing any flash settings." Looking for a solution I tried different steps:
   1.a) Striping the 'factory' part from the binary (the first 0x1000 bytes) which lets the mesage disappear (and -- of course -- starting the programming at 0x1000 also).
   1.b) Using Tasmota Web-Installer to install the binary.
   (this tool is smart and gets it all done, but ONLY with tasmota firmware, even on the UART-port ;-), but that is not what I want to install.
   1.c) Trying the other port, pother binaries (generic, S32, etc.)
   This all had no success.

2. Installing another boot-loader (but how ?!?) ...

3. Trying to install the OpenDTU (the NOT-OnBattery-version) with tasmota-tool.
   This gave me at least this output after booting:

ESP-ROM: esp32s3-20210327
Build:Mar 27 2021
rst: 0x15 (USB_UART_CHIP_RESET), boot: 0x0 (DOWNLOAD (USB/UARTO) )
Saved PC: 0x40041a79 waiting for download

But there was no WLAN-access point opened (it looks like the device still waits for a new upload) and so I could not do anything.

After 2 days of intense searching, testing, and trying I am stuck and kindly asking for your help.

Thanx in advance
(if you hesitate writing / answering in English, I do also speak German -- falls jemand auf Deutsch antworten möchte, geht das auch ;-)