@king_412r Two approaches:

The wider Lora hobbyist community The LilyGO technical site:
https://github.com/Xinyuan-LilyGO/T-Deck

You can also try sales at LilyGO to see if they respond !
-Terry

I have managed to "unconfuse" myself 😊 regarding my last point about Lilygo's labelling of pins.

Somehow my brain made a connection between physical pin number on PCB and GPIO. It seemed incorrect that they were identical.
I see my mistake now.

But the other questions remain. I accidentally ordered the version without soldered pins, so it's a bit difficult for me to test if all GPIO's on PCB are available for us.

@pike2k It was worse a year ago, I had to make my own LilyGO T-Display S3 (not AMOLED) GitHub repository to help people once I got it figured out.
The one on the left of the schematic image that I sent you is
U0RXD = SCL (GPIO 44) (The 'U' stands for Universal)
U0TXD = SDA (GPIO 43) use Wire.begin(43, 44);

The other connector is marked correctly.
It might have been added as an after thought because the ancient but very common Dallas Semiconductor DS18B20 won't run from the GPIO pins 43 or 44.
ESP32 S3 can use almost any pins for almost any function .
But when setting up I2C you have to call Wire.begin(3, 2);
Or whatever pins you want, within reason. (There is a complicated datasheet for the ESP32 S3 and it points out the only no-no's.)
-Terry

@papadeltasierra Aha, there is indeed 4 MB of flash! You need to use idf.py menuconfig and then set the Serial flasher config to 1Flash size 4 MB and then use Partition table to select a 4 MB usable partition table.

Hi Terry, thank you for your reply.
I will try it but it is very complex.

I try it to solve directly with Squaline Studio.

Found it! with help of the lilygo sales team! 🙂

Schematic, DXF, pinout, its all here:
https://github.com/Xinyuan-LilyGO/ESP32_S2

@covalspace Do you already have a LilyGo SIM7000g?
Could you just remove the battery holder?

I have the https://www.lilygo.cc/products/t-journal.

This is exactly why, PlatformIO or Arduino, which Sketch, etc., I asked for instructions.
If I sell such products, I also have to provide instructions on how to use them. And by that I don't just mean plug it in and use it. The products are specifically designated as a development board. Then I want to be able to “develop” with it. But if I have to start from scratch because there are no useful instructions, I can also assemble the hardware myself.
I bought these modules and was hoping for some convenience so that I didn't have to start from scratch and could implement my project quickly.
Really very unfortunate!

@pratikgawde
https://github.com/Xinyuan-LilyGO/T-Display-S3/blob/main/image/T-DISPLAY-S3-TOUCH.png
and
this one is just the base LilyGO T-Display S3, not the Touch, but the same accept the add-on Touch component.
https://github.com/Xinyuan-LilyGO/T-Display-S3/blob/main/schematic/T_Display_S3.pdf

I raised an Issue just now to get a Touch schematic!
-Terry