ESP32-S2 Parallel TFT with Touch(3.5'')

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Introduction

The 3.5" 320x480 TFT LCD driver is ILI9488, it uses 16bits parallel line for communication with ESP32-S2, the main clock could be up to 20MHz, make the display smooth enough for videos; You can freely use some of Mabee pins(A I2c and a IOs) with the breakout connectors, to connect the ESP32-S2 display with sensors/ actuators, suitable for IoT applications.

Model: Resistive: ESPTFT35RE

ESP32-S2 Parallel TFT with Touch A001.jpg

Features

  • Integrated ESP32-S2 with 2.4G WiFi
  • Wi-Fi Protocols: 802.11b/g/n(802.11n up to 150Mbps),A-MPDU and A-MSDU aggregation and 0.4us guard interval support
  • Wi-Fi Frequency range: 2.402GHz - 2.483Ghz
  • Arduino Compatible: You can play it with Arduino IDE
  • LCD 3.5 inch Amorphous-TFT-LCD (Thin Film Transistor Liquid Crystal Display) for mobile-phone or handy electrical equipment
  • LCD Driver: ILI9488(16bits parallel line)
  • LCD Resolution: 320*480
  • FT6236 Series ICs are single-chip capacitive touch panel controller IC with a built-in 16 bit enhanced Micro-controller unit (MCU)
  • NS2009: A 4-wire resistive touch screen control circuit with I2C interface, which contains A 12-bit resolution A/D converter
  • Power supply: 5V, Type-C USB
  • Micro SD card slot on the board
  • Dual USB Type-C: one for native USB and one for USB-to-UART
  • Two Mabee interfaces
  • Board size: 66mm * 85mm


Diagram

ESP32-S2 Parallel TFT with Touch A002.JPG
Pin Assignment
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Dimension
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Note:unit is mm.

Usage

Warning: Don't operate when in power supply on
Github:Project_Touch_Screen_Camera

Software setup

NOTE: In order for the project to work normally, please install the same version.
1.Install the Arduino IDE V1.8.10.
2.Install the ESP32-S2 boards supporting V2.0.1

ESP32-S2 Parallel TFT with Touch A005.jpg

  • Click “Tools>Board>Boards Manager” to search for and install the ESP32 library:
     

ESP32-S2 Parallel TFT with Touch A006.jpg
3.Install LovyanGFX library V0.4.7

Click “Tools> Manager Libraries” to search for and install LovyanGFX library.

ESP32-S2 Parallel TFT with Touch A009.jpg
5.Select and setting the parameter in the Tools menu, as the picture:
ESP32-S2 Parallel TFT with Touch A010.jpg
Note: Different PC has different Serial COM number.

Graph on LCD

1. You can get the sourve code from github: [1]
2. Open the file Graph16_3.5. Select the screen type used and comment out the ones that are not used.

#define LGFX_USE_V1

#include <LovyanGFX.hpp>
#include <vector>

#define LCD_CS 37
#define LCD_BLK 45

#define LINE_COUNT 6

//Choice your touch IC
#define NS2009_TOUCH    //Resistive screen driver
//#define FT6236_TOUCH  //Capacitive screen driver

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3. Verify it and upload.
ESP32-S2 Parallel TFT with Touch A012.jpg
If failed to upload the code as the picture, please upload again and try to press the Flash switch when the code is uploading.
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4. After done uploading, reset the ESP32-S2 and you will get a graph on the screen.
ESP32-S2 Parallel TFT with Touch A014.jpg

Touch the screen

1. You can get the source code from our github:touch16_3.5
2. Copy the picture you want to show to the SD card. Insert the SD card into the board.
3. Open the file “\/simple_test/touch16_3.5” with Arduino IDE.
If you purchase a capacitive screen, make sure the code as below.

//#define NS2009_TOUCH  //Resistive screen driver
#define FT6236_TOUCH //Capacitive screen driver

If you purchase a resistive screen, make sure the code as below.

#define NS2009_TOUCH  //Resistive screen driver
//#define FT6236_TOUCH //Capacitive screen driver

4. Verify and upload the code, you can touch the screen.
File:ESP32-S2 Parallel TFT with Touch A014.GIF

SD card test

FAQ

You can list your question here or contact support@makerfabs.com for technology support. Detailed descriptions of your question will be helped to solve your question.

  • Q: Why the display fails to respond sometimes I touch.
A: The touching interface is loose, please reconnect it.

Resources