Using a 2.8in SPI LCD Touchscreen ILI9341 with an ESP32 on the new Arduino IDE 2

[@psyience3213]

I recently bought the "UNO R3 2.8 Inches TFT Touch Screen with SD Card Socket" and one major problem was that the header files took up over 50% of the program memory. That left just less than 16k bytes, and I wanted to program up 4 or 5 simple games for it so it REALLY was not a lot of memory left. Sure it's got an sd card slot which is cool for adding sprites and stuff but there isn't a simple way around the lack of program space left over.

[@billglass5160]

This video deserves a 5-star rating. I have been trying to function an ESP32 program using the Adafruit_GFX.h, Adafruit_ILI9341.h, and XP2046.h librarys with little success. (The librarys seem to be targeted for the Teensy microcontroller). The Adafruit graphicstest.ino was running at turtle-speed and I had no success for the 320x240 tft display touch function. I then used the tft_espi library to find a working touch function and an extremely fast graphicstest. Very minor modifications to my program were necessary. Very valuable information in this video!!!!!

[@maxmuster9819]

Well done. Thanks. I use the 3.3V from the ESP32 for the power supply of the display (v1.2), and it works without any issues.

[@retrotechandelectronics]

That’s a lot of current for an esp32 regulator

[@sakisv4138]

Bingo, it worked at once, thanks again man you saved a lot of time!

[@retrotechandelectronics]

Glad to help

[@Klitz_j.kiel21]

Hello! I was wondering if you can help me, I followed your steps but touchscreen is not working for me I have tried using 2 different esp32 but both of them didn't work, I was thinking if it was grounded because when I touched the sd card case the touch calibration works even though I'm not touching the screen and when the touch calibration is done touch screen still doesn't work, thanks!

[@jorgezambrano6993]

Hola.. te cuento, tengo la pantalla tft 2.8 y el esp32. pero no logro que funcione el touch. he realizado todo tal cual lo muestras en tu video. 1. #include . 2. #define TOUCH_CS 5 // Chip select pin (T_CS) of touch screen. tal cual quedan abilitado. en cuanto a la pantalla si genera las imagenes correctamente. pero al incluir el programa para la KEYPAD no funcina el touch en el monitor serie solo muestra: 13:42:44.963 -> 8�����1��V(���1�р�. el cableado esta tal cual el video

[@guntherberger493]

Your explanation is fantastic, thanks 1000x from Austria/Europe ! br Günther

[@retrotechandelectronics]

Glad it was helpful!

[@abrown2637]

You are awesome for putting this info out there, thanks

[@retrotechandelectronics]

Youre welcome

[@konero8537]

why my screen cant full screen??? we have same component and i follow ur tutorials

[@NicholasRadina]

Thank you!! I was stuck until I found your help. Cheers!

[@retrotechandelectronics]

Glad to help

[@NicholasRadina]

Curious if you know what of the LCD pins to GPIO pin designations are able to be changed to other GPIO pins. Thanks for any help!

[@KekoElectronic]

Excellent, thanks for the detailed post

[@retrotechandelectronics]

Glad it was helpful!

[@luckylazer3938]

I’m kinda stuck on a white screen. I followed every step along the way but no luck. I am using a custom pcb with a WROOM-32E

[@retrotechandelectronics]

some of your gpio maybe reserved, verify each and adjust accordingly

[@-Fritz-]

Exceptionally well done. Thanks.

[@retrotechandelectronics]

Glad you enjoyed it!

[@siewkiawTan]

Hello...i like your video ... i try on a ESP32 WROOM, but e ILI9341 only able to show half screen....i try all TFT_eSPI example all display half screen... do you know how to resolved this?

[@siewkiawTan]

hello... can u help?

[@retrotechandelectronics]

You set for wrong device.... Wrong resolution.

[@santhoshv6284]

Isn't VCC 3.3V? Supplying 5V can possibly damage circuits in the display

[@pbart9821]

This one has resistors to protect it

[@alhasan838]

How can I create an interface with an image matrix

[@Imufur]

the not ideal thing you say, to fix that you should have ran the LED from the power supply instead of the 3V3?

[@retrotechandelectronics]

ok

[@billfield8300]

Good demonstration and explanation. You mentioned that the device uses quite a bit of power.. Do you have a value for that? Do you know how much current it draws? That would be helpful for me. I have a datasheet but it is quite lacking in electrical information. Thanks.

[@mrblack3020]

I have a blank white screen when i connect my t_clk to pin 18. The screen works with it not pluged in but then i have no touch screen any ideas?

[@titouangautier5359]

Hi, I have the same problem, did you resolved it ?

[@jumbo999614]

@@titouangautier5359 vcc 3.3v gnd ground cs 15 rst 4 dc 2 mosi 23 csk 18 led 3.3v miso (not connect) t_slk 18 t_cs 21 t_din 23 t_do 19 some of them are shared connection which mean they use the same pin from ESP32.

[@markuspfaff5504]

good and interesting video, thank you. Is there a way in the parameters that the displayed text on the button can be centered vertically? At the moment it looks like the text is slightly vertically shifted upwards.

[@jinsoku1911]

​@retrotechandelectronics when you show the star field a capacitor suddenly shows up on the breadboard. What was that for?

[@retrotechandelectronics]

Cap is added on certan esp32 boards to help with brownout condition that may occur across ground and vin. not part of actual project.

[@mpimomimo640]

Please assist i Have a esp32 DA Module with 38 pins and a TFT 240mmx320mm touchscreen , i followed the respective steps on your video, and my screen is just white

[@LuisDiaz-of1ez]

same here, screen just white.

[@billybbob18]

You can get a 40mhz clock on that display by modding a few lines in the TFT _eSPI library. That combination can give you crazy frame rates.

[@retrotechandelectronics]

At much greater power consumption..

[@billcheung5326]

Great video with good help! Thanks. Can you advise how you decided with wiring of the pinout? Thanks again!

[@retrotechandelectronics]

I read the documentation in TFT_espi

[@Vagubando]

I have letters inverted vertically on such a display. I have tried many libraries, but there is no result. Advise me where to dig ?????

[@retrotechandelectronics]

tft.setRotation(1);

[@Vagubando]

@@retrotechandelectronics Эта команда переворачивает ВЕСЬ экран, а мне надо ТОЛЬКО буквы в тексте. This command turns the WHOLE screen, and I ONLY need letters in the text.

[@GLOWUPP]

The code plz !!

[@pramagetable]

The code is available when you choose files>examples>tft-espi> and you choose the program you want it opens up and you just have to compile it to make it run😊

[@GLOWUPP]

@@pramagetable bro i graduate 7 months ago 🤣 i needed that for my thesis but it's okay 😅

[@nathanneisan5697]

nice vids thanks, btw could you help me, mine was having only 3/4 of the screen 1/4 blank i dont know why, when i change the rotation from 1 to 3 it change from left to right what should i do ?

[@teohjingyang3082]

What if my tft display is a 3.5" 480x320? Are the steps the same? especially those in User_Select_.h files

[@retrotechandelectronics]

You would need to select the line in the config for the appropriate display.

[@סיניגרבי]

hi. thank for the movie. i do like you. but the display show 80% display. can i help me with that?

[@retrotechandelectronics]

דוגמה עבור צג [320x240], עליך לזכור לבחור מספר 42 ב- 'user.setup.select.h' [240x320].

[@herrkronen9694]

What was that shitty thing with "python" ?? Do I need python in my computer to use the library ?

[@lohikarhu734]

I just wondered if you have the project software Listed? Haven't had time to watch the whole video (quite ill, at the moment), sorry if you point to it in the video...

Olá tudo bem não consegui fazer funcionar se poderia fazer mais um vídeo recente

[@j-baz6454]

Great Video, Thanks!

[@retrotechandelectronics]

Glad you enjoyed it!

[@DmytroSaliy]

Дякую. Відео дуже допомогло.

[@retrotechandelectronics]

Glad it helped.

[@tdmckee-mm8wn]

Libary? Where did the “r” go? Library.

[@retrotechandelectronics]

.

[@JCWren]

Good video, be interested to see what you end up using the touchpad for. One of THE most irritating things about the Arduino/PlatformIO environment is the unnecessary recompilations. 2nd to that is suppressing useful warnings in the name of "ease of use".

[@tookitogo]

The looniest thing is the Arduino IDE 2.0’s way of implementing code auto-completion and error detection: it’s constantly recompiling in the background. So it’s always lagging behind, and it basically can’t keep up with me. (And I am hardly some programming whiz.) I’ve moved completely to PlatformIO.

[@JCWren]

@@tookitogo I haven't looked at 2.0 yet, and it looks like I won't bother to. 2.0 is built on Eclipse, which I've never cared for (buried configuration options, difficult to move projects between machines, etc). I'm a command line kinda guy, and PlatformIO suits me much better. I'll stick with what keeps me productive.

[@tookitogo]

@@JCWren Do you use PlatformIO within Visual Studio Code like most people, or do you run the pure CLI version? (Just curious.)

[@JCWren]

@@tookitogo Pure CLI. I use vim for it's cross-platform portability. Copy my .vimrc file from a Linux, Windows, or Mac machine, and it behaves the same everywhere.

[@retrotechandelectronics]

I was going to use it for the sprinkler project but ended up using the lcd screen and an encoder wheel.

[@Vagubando]

Where is the code ?

[@retrotechandelectronics]

In the examples section of tft_espi

[@appdronemap9475]

tks

[@retrotechandelectronics]

Yw

[@InvisiblePinkSoylent]

Jenny don't change your number!

[@retrotechandelectronics]

She wont.

[@dbjindian]

No code no use

[@retrotechandelectronics]

I’m not sure what that means. Is that a motto?

[@dbjindian]

@@retrotechandelectronics yes