@cesarsarria, If I knew which LilyGO 7680 you have, I could recommend

ESP32 Dev Module
or
ESP32S3 Dev Module
Which are standard board types that LilyGO designed-to to make it easier.
They only recently added the new types, but yours is not specifically listed!!
Below is the ESP32S3 Dev Module that goes with LilyGO T-Display S3
Screenshot 2024-01-12 at 5.20.13 PM.png

@teastain2
Thanks Terry for your response. Sorry for not having seen this thread in many time, I just simply put them in a drawer and moved to another devices.

Time today is gold.

Thank you again, for your gold.

Tx.

You need to enter upload mode by first pressing Boot, then press and release Reset, then release Boot.
After upload you may have to unplug the board and plug it back in.

You can also "erase all flash before uploading" but it takes a long minute!

I have no experience with keyboards and mouse on ESP32, as I consider a Rasp pi a better choice for 'that sort of thing'.

Hello Terry

thank you for answering, I fear that this will not be of much use because I have, as an ex,
uploaded: ESPNOW_for_T_Display
the answer is :

ESP-ROM:esp32s3-20210327 Build:Mar 27 2021 rst:0x15 (USB_UART_CHIP_RESET),boot:0x8 (SPI_FAST_FLASH_BOOT) Saved PC:0x42073a4a SPIWP:0xee mode:DIO, clock div:1 load:0x3fce3808,len:0x44c load:0x403c9700,len:0xbe4 load:0x403cc700,len:0x2a68 entry 0x403c98d4

and the screen remains black

pascal

Does anyone else have any advice on what’s going on here?

@teastain2
Yes, it is plugged into the t_u2t.
It still doesn't have any LEDs anymore - how can I reset it? Have to say the t-u2t is very confusing.. only noticed the button hours in .. still not sure what it does.
Should the status led be on when just connected to power? - mine doesn't.
Could it be broken?

@teastain2
Thanks, I'll take step 3

@dirk Well, Dirk that sketch has 'a lot of moving parts'!
My troubleshooting approach is run my HotHead sketch and see if it will run on battery.
If 'yes' then we must assume that one of your many sensors are drawing too much current and lowering the Vinput.
Can you measure the battery voltage with a meter as you unplug the USB and switch to battery. (This may require a push of the little black Reset button to restart it.
-Terry

@teastain2, just wanted to thank you. Your answer nudged me to search for another type of solution and I figured out a way to make it work with the USB-C.
Thanks a lot!

It's working again.
powered off, removed battery, and left overnight. Powered up and blue light started flashing. Flashed again from the web and it's working OK.

@yams Yes, but it is fraught with danger:

LilyGO sells these as a ready-made user device with a firmware uploaded to it, rather less than a typical Arduino experimenter kit! Hard to find the original as-shipped source code for Arduino 2.x.x Hard to "nail-down" the LilyGO GitHub repository for your EXACT board Sure you can create your own program, but converting back to as-shipped might be difficult due to ever-shifting libraries and other 'dependancies'
(This third party firmware repository may help:
https://github.com/lyusupov/SoftRF/wiki/Prime-Edition-MkIII?spm=a2g0o.detail.1000023.1.4d0d23a04K7ZhM
)

@_flyflo_
"The Guy with the Swiss Accent" is an expert in Arduino and RF.
Check out his posts for more info!
https://www.youtube.com/@AndreasSpiess

LoRa
https://www.youtube.com/watch?v=hMOwbNUpDQA

I have the same problem. Have you solved it?

@blyshchak

Just saw your message, a buddy of mine has a T-Beam, not sure what frequencies his operates at, so I will get my hands on it and take a look.