The TFT LCD Display Module 3.5 inch with Touch is an essential component for interactive automation projects. With its ability to display vivid texts and images and provide touch functionality, it opens up exciting possibilities for user interaction. This module also features an SD card slot for reading and writing data directly to the screen. In this guide, we will cover everything you need to know about setting up this display with an ESP32, understanding the pin configurations, and following essential safety guidelines.
Displays are quite common in automation projects. Among these displays is the “TFT LCD Display Module 3.5 inch with Touch.” With this display, you can show various texts and also get amazing outputs by touching it. It includes an SD card slot, allowing you to read and write images and data using an SD card, which can also be displayed on the screen. To make the display work entirely, 10 pins of the ESP32 are used. Only 5 pins are necessary for the display, and a separate pin of the ESP32 must be used to control the backlight. Otherwise, it can be connected directly to 3.3 volts. No connection is needed for the pin named SDO (MISO). The TFT_eSPI library is used for the complete interface.
Pin Diagram of TFT LCD Display Module:
The display has a total of (14+4) = 18 pins on both sides. The left side has power pins (3.3 volts) and pins for the display and touch panel. The opposite side has pins for the SD card. It is not necessary to connect all the pins simultaneously. Only the required pins need to be connected for the task being worked on. The CS, RESET, DC/RS, SDI (MOSI), SCK, and LED pins are necessary for the display. When touch functionality is needed, the T_CLK, T_CS, T_DIN, T_D0, and T_IRQ pins are used, and for the SD card, the SD_CS, SD_MOSI, SD_MISO, and SD_SCK pins are used.
ESP32
The pin diagram of the TFT LCD Display Module is provided below.
Dimensions:
Required Components:
The list of components is given below. All connections are made using silicone jumper wires. Due to their high quality, there will be no issues with wire separation inside.
| Serial No. | Component Name | Model | Quantity |
| 1 | TFT LCD Display Module 3.5 inch with Touch | DIS-00122 | 1 |
| 2 | Breadboard (830 Point) | MIS-00002 | 1 |
| 3 | ESP32 Development Board 30 Pin | WIR-00072 | 1 |
| 4 | Micro USB Data Cable | C&C-00259 | 1 |
| 5 | SD Card or Micro SD Card | 1 | |
| 6 | ESP32 IOT Board | DEV-00129 | 1 |
| 7 | Silicone Jumper Wire (Male to Female) | C&C-00246 | 1 |
| 8 | Silicone Jumper Wire (Male to Male) | C&C-00245 | 1 |
Circuit Connection:
Demo Code:
The demo code is mainly an example code from the TFT_eSPI library, which can be found in this location: TFT_eSPI\examples\480 x 320\TFT_Rainbow480. There are codes available for several display sizes, which can be tested as per your preference.
Warnings:
1. Do not apply pressure on the display screen when placing it on the breadboard.
2. Do not supply more than 3.3 volts to the VCC pin.
3. The LED pin should be turned on with 3.3 volts unless controlled separately.
4. The SDO (MISO) pin should remain disconnected according to the current circuit.
5. Ensure all connections are secure before supplying voltage.
Conclusion
The TFT LCD Display Module 3.5 inch with Touch is an invaluable component for interactive and visually engaging projects. By understanding its pin configuration and proper setup with the ESP32 board, you can unlock the full potential of this display, from showing text and images to utilizing its touch functionality and SD card capabilities. Remember to follow the guidelines and warnings mentioned to ensure the longevity and efficiency of your setup.
FAQs
1. What is the main advantage of using the TFT LCD Display Module 3.5 inch with Touch?
The primary advantage is the combination of vibrant display output and touch functionality, which allows for interactive interfaces in automation and IoT projects. Additionally, the built-in SD card slot enables reading and displaying images or data effortlessly.
2. How many pins are required to set up the TFT LCD Display Module 3.5 inch with Touch?
The display requires 10 pins of the ESP32, but only 5 pins are necessary for the display functionality. An additional pin can be used for controlling the backlight, and specific pins are needed for the touch interface and SD card functionality.
3. What precautions should I take when using the TFT LCD Display Module?
• Avoid applying pressure on the screen, especially when placing it on a breadboard.
• Do not exceed 3.3 volts for the VCC pin.
• Ensure that the SDO (MISO) pin remains disconnected as specified.
• Verify all connections before supplying power to prevent damage.
4. Can I use any SD card with the display module?
Yes, most SD or Micro SD cards will work with the module, provided they are properly formatted and compatible with your setup.
5. Which library is recommended for interfacing the display with an ESP32?
The TFT_eSPI library is highly recommended for interfacing the display with an ESP32. This library provides example codes that can be customized for various display sizes.
Note: This content and image are inspired by TechShopBD.
