ESP32-S3 Development Board 3.49 inch IPS Capacitive Touch Display

Resources:

Wiki: www.waveshare.com/wiki/ESP32-S3-Touch-LCD-3.49

ESP32-S3 Development Board with 3.49-inch IPS Capacitive Touch Display

The ESP32-S3-Touch-LCD-3.49 is a high-performance, feature-rich development board from Waveshare, designed for intelligent control, HMI interfaces, IoT applications, and embedded product development. It integrates the ESP32-S3R8 dual-core microcontroller, a 3.49-inch IPS capacitive touch display, advanced sensors, and robust connectivity — enabling developers to create interactive and visually engaging smart systems efficiently. Powered by the Xtensa 32-bit Lx7 dual-core processor, running up to 240 MHz, the ESP32-S3 offers excellent performance for multitasking, AI inference, and edge processing. It includes 512KB SRAM, 384KB ROM, 8MB PSRAM, and 16MB Flash memory, ensuring sufficient storage and smooth system operation for demanding applications. With 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) support, it enables stable wireless connectivity for IoT projects and smart device integration.

The board features a 3.49-inch IPS capacitive touchscreen (172x640 resolution, 16.7M colours), providing vivid visual output and intuitive touch control. It integrates a dual-microphone array with noise reduction and echo cancellation, ideal for voice interaction, speech recognition, and far-field wake-up scenarios. Additionally, it includes a QMI8658 6-axis IMU for motion detection and gesture sensing, and a PCF85063 RTC chip for accurate real-time clock functions. For multimedia and expansion capabilities, the board includes a low-power audio codec, TF card slot, and battery interfaces supporting both 3.7V lithium cells and 18650 batteries. A 22-pin expansion header allows developers to connect additional modules easily, extending the board’s flexibility for various applications such as smart home systems, portable devices, and wearable electronics.

Key Features

• Powerful ESP32-S3R8 MCU: Xtensa 32-bit Lx7 dual-core processor up to 240MHz with 512KB SRAM and 384KB ROM.
• Large Memory Support: 8MB PSRAM and 16MB Flash for enhanced performance and data storage.
• Wireless Connectivity: Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) with onboard antenna.
• High-Resolution Display: 3.49-inch IPS capacitive touchscreen (172×640 resolution, 16.7M colours) for clear visuals and interactive control.
• Touch Controller: Built-in AXS15231B LCD & touch controller with QSPI and I2C interfaces.
• Dual Microphone Array: With noise reduction and echo cancellation circuit for precise speech recognition.
• Integrated Sensors: Onboard QMI8658 6-axis IMU (3-axis accelerometer+3-axis gyroscope) for motion detection and gesture recognition.
• Real-Time Clock (RTC): PCF85063 RTC chip for accurate timekeeping and scheduled operations.
• Audio Codec IC: Low-power audio chip for media playback and voice features.
• Power Management: Mx1.25 lithium battery charging/discharging header or 18650 battery holder for flexible power options.
• Storage Expansion: TF card slot for data logging, media storage, and rapid data transfer.
• Programmable Buttons: PWR and BOOT keys for easy firmware uploading or user-defined control.
• Expansion Interface: 22-pin 2.54mm pitch through-hole header for module expansion and prototyping.
• Ideal Applications: IoT control panels, smart displays, AI interfaces, robotics, and multimedia devices.

ESP32-S3 High-Performance Development Board With 3.49inch IPS Capacitive Touch Display, 172x640 Resolution, Integrated With ESP32-S3R8 Dual-core Processor

Capacitive Touch

What's On Board

1. ESP32-S3R8
   Wi-Fi and Bluetooth SoC, up to 240MHz operating frequency, with onboard 8MB PSRAM
2. Onboard antenna
   supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE)
3. TCA9554PWR
   8-bit I2C GPIO expansion chip
4. W25Q128JVSI
   16MB Flash memory
5. ES8311 DAC audio encoding chip
   high-performance, low-power audio DAC
6. ES7210 ADC audio decoding chip
   high-performance, low-power audio ADC, supports multiple microphone inputs
7. QMI8658
   3-axis gyroscope and 3-axis accelerometer, suitable for applications such as attitude sensing and motion recognition
8. Dual microphone array design
   dual-digital microphone, supports more advanced voice interaction functions
9. TF card slot
   supports FAT32-formatted TF card for data expansion
10. RESET button (back side)
    press the BOOT, then click the RESET button to enter download mode
11. PWR power button (back side)
    Enables power control via software configuration when using Lithium battery for power supply
12. BOOT button (back side)
    press the BOOT, then click the RESET button to enter download mode
13. MX1.25 2PIN speaker header (back side)
    audio signal output, for connecting external speaker
14. IPEX1 connector
    for connecting external antenna, enabled via resoldering an onboard resistor
15. 22PIN 2.54mm pitch through-hole pads
    for connecting external modules and enabling functional expansion
16. Type-C port
    for program burning and log printing
17. PCF85063
    RTC clock chip, supports time retention

Dimensions

Package Content:

1. ESP32-S3-Touch-LCD-3.49x1
2. OPTIONAL 18650 Lithium batteryx1