ILI9341 Project ESP-IDF

Overview

This project demonstrates how to read temperature and humidity data from a DHT22 sensor and display it using LVGL (Light and Versatile Graphics Library). The temperature and humidity data are updated in real-time on a graphical user interface (GUI) running on an embedded system.

Hardware Requirements

• ESP32 development board
• DHT22 sensor
• ILI9341 TFT LCD display

Wiring

ILI9341 Pin	ESP32 Pin	Description
VCC	3.3V	Power supply
GND	GND	Ground
CS	GPIO 13	Chip Select
RST	GPIO 12	Reset
DC (RS)	GPIO 14	Data/Command
SDI (MOSI)	GPIO 27	SPI Master Out Slave In
SCK(CLK)	GPIO 26	SPI Clock
LED	3.3V	Backlight
SDO (MISO)	GPIO 25	SPI Mater In Slave Out

Add Library

LVGL (8.3.7)

From your project's root directory:

1. Download here: https://github.com/lvgl/lvgl/archive/refs/tags/v8.3.7.zip
2. Create a directory named components (if you don't have one already) with mkdir -p components
3. Move/copy lvgl/ to /components
4. Run idf.py menuconfig, go to Component config then LVGL configuration to configure LVGL.

lvgl_esp32_drivers

From your project's root directory:

1. Clone the lvgl_esp32_drivers

   git clone https://github.com/hiruna/lvgl_esp32_drivers/tree/develop/lvgl_8.3.7_idf_5.2

2. Create a directory named components (if you don't have one already) with mkdir -p components.

3. Move/copy lvgl_esp32_drivers to /components

4. Run idf.py menuconfig, go to Component config then LVGL TFT configuration and LVGL TFT Display configuration to configure lvgl_esp32_drivers.

am2302_rmt

From your project's root directory:

1. Download Here: https://components.espressif.com/api/download/?object_type=component&object_id=2446f0b5-72f7-406f-bc51-20baafcde756
2. Create a directory named components (if you don't have one already) with mkdir -p components.
3. Move/copy am2302_rmt to /components

How to use

1. Build/compile the project

   idf.py build

2. If no error exist, flash the program

   idf.py flash

References

https://github.com/xpress-embedo/ESP32/tree/master/ESP-IDF/LVGL_HelloWorld

https://docs.lvgl.io/8.3/index.html