Source: https://mokxi.com/boards/cheap-yellow-display Updated: 2026-10-26 Board # Cheap Yellow Display simulator, an ESP32 with a touch screen The Cheap Yellow Display, Sunton’s ESP32-2432S028R, is a classic ESP32, of which one Xtensa LX6 core runs here, behind a 2.8 inch 240x320 ILI9341 screen with an XPT2046 touch film. Both are wired inside the board as on the real one, so TFT_eSPI needs no setup file and you touch the screen by pressing it. WiFi joins a simulated network. Start building free - 7 peripheral areas modeled - 2 projects ready to run - Real time on your own machine Click to open it in the editor The board is running real firmware right now. Click it to open the circuit in the editor. The model ## What is modeled Taken from the board's own contract document and put in plain words, with what is missing beside it. ### Modeled Core One Xtensa LX6 core, the DevKit V1 model whole The screen The ILI9341 part on HSPI: MOSI 13, MISO 12, SCK 14, CS 15, DC 2, backlight on GPIO 21 The touch film The XPT2046 on its own lines: CLK 25, DIN 32, DO 39, CS 33, IRQ 36. Press the screen to touch it TFT_eSPI The board’s User_Setup.h built in, so a sketch that names no pins draws on the screen The RGB LED GPIO 4, 16 and 17, each color lit when its pin is LOW The connectors P1, P3 and CN1, by the names Wokwi’s drawing gives them WiFi, simulated WiFi.h over a network written in software: no radio, no 802.11, no real internet ### Not modeled - The light sensor on GPIO 34, the speaker amplifier on GPIO 26 and its connector, and the microSD slot on VSPI. - CN1’s second IO22: here IO22 is only on P3, as in Wokwi’s drawing. - Reading the panel back over MISO: it gives black. - The second core, ADC2, Bluetooth and a real radio. Start here ## Open one and press Run Each of these opens in the editor exactly as it is drawn here. Projects ## Every built-in project on the Cheap Yellow Display Each has its own page with the circuit running, the code and a parts list. - CYD hello Beginner - CYD touch paint Intermediate Learn ## Tutorials that use this board Each one ends in a running circuit, on this same board. - The Cheap Yellow Display pinout: connectors, screen and touch ## Questions Is it free? Yes. Every board and every part is on the free plan, with no account needed. Do I need a User_Setup.h? Not here. If your sketch names no TFT pins, TFT_eSPI gets the board’s setup: ILI9341_2_DRIVER, MISO 12, MOSI 13, SCLK 14, CS 15, DC 2, RST -1, backlight 21. On a real board you install that setup in the TFT_eSPI library folder, as the tutorials say. How do I touch the screen? Press on it while the circuit runs, and drag to move your finger. The sketch reads the XPT2046 with XPT2046_Touchscreen on its own SPIClass(VSPI), on CLK 25, MISO 39, MOSI 32 and CS 33, with IRQ on 36. Why is the board drawn upright? So it fits beside a breadboard. The real board lies landscape. Rotate the part to lay it the same way; setRotation(1) in the sketch turns the picture to landscape too. Also here ## The other boards Every one of these runs today, and every one is free. ESP32-C3-DevKitM-1 A RISC-V chip at 160 MHz, on the real memory map. Open the board page Arduino Uno R3 The classic Arduino, with an ATmega328P running at 16 MHz. Open the board page Arduino Nano The Uno’s chip on a small board that fits a breadboard. Open the board page Arduino Mega 2560 The big Arduino, with 54 digital pins and four serial ports. Open the board page Arduino Leonardo An Uno-shaped board whose chip does its own USB serial. Open the board page ESP32-C6-DevKitC-1 A second RISC-V board, with 31 pins and simulated WiFi. Open the board page ESP32 DevKit V1 The classic ESP32 at 240 MHz, with simulated WiFi. Open the board page ESP32-S3-DevKitC-1 The ESP32-S3 at 240 MHz, with USB serial and an RGB LED. Open the board page All 39 boards ## Try it on your own firmware What you build here runs on the board on your desk, unchanged. Nothing to install and no account needed. Start building free Open the editor