@ardymoon The LilyGO products are poorly supported, compared to M5Stack or Arduino.
You can go here:
https://github.com/Xinyuan-LilyGO/T-QT/issues
And start a new issue to get LilyGO support.
I may have misspoken:
The LCD_BL may be active LOW, who knows?
On the LilyGO T-Display S3 it is active HIGH!
Can you check if your sketch does this:
#define PIN_LCD_BL 10
pinMode(PIN_LCD_BL, OUTPUT);
digitalWrite(PIN_LCD_BL, HIGH);
Unbelievably their demo LCD.ino sketch turns this OFF at line 25.
I do not have a T-QT Pro to test but if this fixes it, I will file an issue in their repository against it.
-Terry
@tavdog I saw Mickey closed your issue in LilyGO T-Display S3 repository ?
This is confusing because swap bytes is much like reversing a film negative in that it should change radically with swap bytes true or false.
Did you checkout my LilyGO T-Display S3 repository ?
[edit] I just did this test of your image on my LilyGO T-Display S3 !
point is that blue came out blue and red is red!
@rogeriocpe said in LilyGo-T-Relay change I2C pins:
INA219
oof, OK. Can you draw out the circuit and post it, or email it to me at:
teastain@me.com
Hmmm... not much to go on!
So I would recommend my GitHub Repository setup guide for LilyGO T-Display S3 here:
https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples
My examples are simple stable demo programs to get up and running.
Let me know, Terry.
@rogeriocpe As you probably know there does not seem to be a dedicated I2C port. Looking at the chip pinout here:
https://www.espressif.com/sites/default/files/documentation/esp32-wrover-b_datasheet_en.pdf
page 9, I would guess that GPIO 26 and 14 would work for I2C.
Maybe define them with wire.begin(26, 14);
I do not have a T-Relay to try this on!
Cheers, Terry
@h5n1xp Hi!
I don't know if you've see this, but I have a support and setup guide that I made over on GurHub:
https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples
Thanks for your support!
-Terry
@roblatour The JST beside the USB-C is SDA 43, SCL 44
https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples/blob/main/T-DisplayS3_Pinout.png
Cheers, Terry
@tebachi
As a hobbyist/maker I find Arduino a piece-of-cake and meets all of my needs.
PlatformIO and ESP-IDF looks like a huge pain in the ass!
Cheers, tho'!
@tebachi
Hmmm... I use Arduino Ver 1.8.19 and it is stable, I can load all the projects.
I had a lot of trouble with the T-Display S3 initially with no support from LilyGO, so I made my own "New User" help desk Repository:
https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples
Let me know if it helps!
-Terry
P.S.
The S3 chips sometime (!) need the Boot Button GPIO0 to be pressed, while holding press the tiny black Reset button on the back and release only the Reset, then release the Boot.
(You may still have to unplug from USB and re-plug before it loads.)
very persnickety
@bobbycharles
So glad to hear that you got it running!!!
I had a lot of trouble getting my T-Display S3 working, with no support from LilyGO, so I started my Repository.
Swapbytes is a very technical subject, think of it as "inverse polarity" that creates a negative image.
(It is actually Little Endian vs. Big Endian byte order)
Cheers, Terry
@bobbycharleshEreswhat I use to create my "HotHead" image:
// Generated by : ImageConverter 565 Online
//http://www.rinkydinkelectronics.com/t_imageconverter565.php
//I recommend 170X170 or less as needed for proportion
//select output as .c file and change to .h
// Generated from : hothead.jpg
// Time generated : Sat, 01 Oct 22 00:53:37 +0200 (Server timezone: CET)
// Image Size : h155 x v170 pixels (vertical max170!!!)
// Memory usage : 52700 bytes
This is for T-Display S3, tho.
From my GitHub repository:
https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples/blob/main/HotHead/hothead.h
@jcorbella You will need:
@romanf Hi!
We have all "bricked" our T-Display S3 at some point, so I made a setup and example GitHub repository. The LilyGO T-Display S3 is a very advanced board, but poorly supported by LilyGO, the schematic is a confusing mess.
(The TFT display is one of the first small LCD to be 8bit parallel interface, not SPI as the library name implies. This means that you can only use the supplied TFT_eSPI driver and can never do an Arduino Library Update on it.)
I encourage you to follow it step by step and try running the demo sketch "LilyGO_HotHead.ino" to make sure.
Also: both example sketches are very "tutorial" for learning ESP32 and sprites.
@teastain Also:
LilyGo use the Qwiic "SIZED" connector but no standards as to pin function. It would appear that SDA and SCL are wire/pin swapped at the connector and would require that your cable be cut and re-soldered to the swapped wires.
I got lucky and my T-Display was GND, V+, SDA, SCL same as qwiic.
You may try swapping 44, 43 with 43, 44 (!!!) might work. but wire swapping is best.
Please let me know what you find out!
@mrudick1 I ran a temp sensor on I2C thru the Qwiic port with no problem on a LilyGO T-Display S3.
I have a GitHub Repo with a sample sketch : "LilyGO_tempsensor_hothead.ino "
https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples
Maybe you can read this over and get yours working?
-Terry
Sadly I see no one has responded.
If you can find the GitHub repo from LilyGO for this exact board, you could raise an "Issue" and attract help from the factory.
With another board, the T-Display S3, this fault is caused by not initializing the PWR_EN in the setup of your sketch, but I do not know the GPIO output for your board.
On mine it is GPIO15.
Cheers, Terry
@roblatour Thanks! I know you would like to turn them off, but...
I submitted an Issue on their GitHub and got this response!
"Thank you for your support to lilygo. The gray WS2812 in the schematic does not exist in reality. There are two LED lights on the board, one is for charging indication (it will flicker when the battery is not connected, it will be always on when it is connected to charging, and it will be off in other states). The other one is connected to the same line as the backlight to be controlled together with the backlight."
I further tested and found these characteristics and posted it in my setup text:
<on-board LED colours and function:>
Green LED indicates board is powered up (Power Enabled) using either USB or Battery
Red LED indicates Board is powered up by USB only
@roblatour They are not well documented by LilyGO.
They are not user I/O, so you would have to blot them out with black paint.
I have studied the rather useless schematic provided and Red is USB power and Green is not documented. I have asked LilyGO for an updated or at least correct dwg.
-Terry
