Comments on: MicroPython: ESP32 Cheap Yellow Display Board – CYD (ESP32-2432S028R)

By: Fred

Fred — Tue, 03 Mar 2026 00:11:05 +0000

In reply to Aart.

For future people who read this, a little late for you. I have a 2USB CYD with ST7789. The ili9341.py driver works with the ST7789 fine for me. Change the following line in ili9341.py

def __init__(self, spi, cs, dc, rst, width=240, height=320, rotation=0, mirror=False, bgr=False, gamma=True):

Rotation 0 and BGR=False (to fix colour inversion.

In the boot.py this line;
display = Display(display_spi, dc=Pin(2), cs=Pin(15),
rst=Pin(15), width=320, height=240, rotation=0)
Just changed the rotation.
That is all and it displays perfectly on a 2USB CYD with ST7789.

By: Sara Santos

Sara Santos — Tue, 21 Oct 2025 14:36:18 +0000

In reply to Tom.

Hi.
Do you get any error messages on the shell?
Regards,
Sara

By: Tom

Tom — Tue, 21 Oct 2025 06:36:49 +0000

Help, again. I had this board up and running and up to Module 3 but have not used it for about 2 months. Today I powered it up and got the PC beep but blank/black screen. I had another CYD and it powered up ok, had text and tabs etc. Everything seemed fine. Then I installed MicroPython successfully but then got black screen again. Re-flashed it again, still no display. Any suggestions?

Win 11/64; i7 9700K; 16GB RAM; Thonny 4.1.7; Python 3.10.11; Tk 8.6.13; MicroPython v1.26.1; CYD 2432S028R

By: Erwin

Erwin — Tue, 06 May 2025 10:10:10 +0000

Hi Sara:
Really appreciating the guide!
The example ‘Draw shapes on the Display – Code’ gives an error stating ‘OSError: transfer on deinitialized SPI’. This is because display.cleanup() is executed twice. The easiest way to prevent the error is to remove display.cleanup() above the try: statement.

By: Sara Santos

Sara Santos — Tue, 06 May 2025 08:19:28 +0000

In reply to Erwin.

Hi.
Thanks for those tips.
Regards,
Sara

By: Erwin

Erwin — Mon, 05 May 2025 18:40:29 +0000

Thx again Sara for this helpful tutorial!
Probably worthwhile to mention >
If you have a not fully filled 90deg rotated screen : change the rotation argument of the Display function in main.py from 90 to 0 (or 180).
If you have red and blue colors swapped : change the bgr argument of the class Display constructor (init) in ILI9341.py from True to False.

By: Glenn Meader

Glenn Meader — Tue, 04 Feb 2025 16:42:31 +0000

In reply to Sara Santos.

https://github.com/de-dh/ESP32-Cheap-Yellow-Display-Micropython-LVGL

By: Mike Larthwell

Mike Larthwell — Sun, 05 Jan 2025 18:10:45 +0000

Hi Sara
Great info again
How do you use the img2rgb565.py tool ?

By: Sara Santos

Sara Santos — Sat, 04 Jan 2025 10:54:53 +0000

In reply to Ed Schmidt.

Hi.
You just need to upload a new code using Arduino IDE.
If you’re using the Pico, you need to press the BOOTSEL button on the board at the same time that you connect the Pico to your computer so that it goes into bootloader mode. Everything is explained in this tutorial: https://randomnerdtutorials.com/programming-raspberry-pi-pico-w-arduino-ide/
Regards,
Sara

By: Ed Schmidt

Ed Schmidt — Fri, 03 Jan 2025 22:54:43 +0000

Very good article, I have been wanting to try MicroPython on my CYD. But I would like you to cover how to uninstall MicroPython and go back to programming with the Arduino IDE. I have been unable to uninstall it from my raspberry pi pico.

Thanks for all you do.