# Waveshare ESP32-S3 Touch LCD 3.49

> ESP32-S3 dev board with 3.49" capacitive touch IPS display, dual microphone array, 6-axis IMU, RTC, and battery support. Ideal for wearable UIs and compact IoT dashboards.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$33.95
- **Product Readiness:** developer
- **CPU:** ESP32-S3R8
- **CPU Architecture:** Xtensa LX7 Dual-Core
- **CPU Cores:** 2
- **RAM:** 512KB SRAM
- **PSRAM:** 8MB
- **Flash:** 16MB
- **USB:** Type-C
- **Power:** 5V
- **Operating Voltage:** 3.3V
- **Antenna:** Onboard + IPEX
- **SD Card:** TF (microSD)
- **Display:** 3.49" IPS LCD 172x640

## Connectivity

- **Wifi:** 2.4GHz 802.11b/g/n
- **Bluetooth:** BLE 5.0

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Compatible Firmware

arduino, esp-idf, micropython, lvgl

## Use Cases

- embedded-ui
- smart-home-dashboard
- industrial-hmi
- iot-dashboard
- wearable-device

## Components

- **ESP32-S3R8** (MCU): Xtensa LX7 dual-core processor at 240MHz with integrated WiFi and Bluetooth 5.0 LE, 512KB SRAM and 8MB stacked PSRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **3.49" IPS LCD (AXS15231B)** (Display): 172x640 IPS LCD with 16.7M colors, 350 cd/m² brightness, 1200:1 contrast, driven via QSPI interface with I2C capacitive touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Touch-LCD-3.49&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **QMI8658** (IMU): 3-axis accelerometer and 3-axis gyroscope for motion sensing and orientation detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qstcorp.com%2Fupload%2Fpdf%2F202202%2FQMI8658A%2520Datasheet%2520Rev%2520A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **PCF85063** (RTC): Low-power I2C real-time clock/calendar chip for accurate timekeeping with battery backup support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **ES8311** (Audio DAC): Low-power mono audio codec with integrated DAC for speaker output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES8311%2520PB.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **ES7210** (Audio ADC): High-performance 4-channel audio ADC for dual microphone array input with noise reduction — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES7210%2520PB.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **TCA9554PWR** (GPIO Expander): 8-bit I2C-bus and SMBus I/O expander providing additional GPIO pins — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftca9554.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **QSPI**

## Description

## Overview

The Waveshare ESP32-S3 Touch LCD 3.49 is a compact development board built around the ESP32-S3R8 dual-core processor running at up to 240 MHz. It features a 3.49-inch IPS capacitive touchscreen with 172x640 resolution, making it well-suited for building vertical UI interfaces, smart home panels, and wearable-style displays.

## Key Features

- **High-resolution display**: 3.49" IPS LCD (172x640) with 16.7M colors, 350 cd/m² brightness, and 1200:1 contrast ratio
- **Capacitive touch**: I2C touch interface for responsive UI interaction
- **Rich audio**: Dual microphone array with noise reduction and echo cancellation, ES8311 DAC and ES7210 ADC
- **Motion sensing**: QMI8658 6-axis IMU (accelerometer + gyroscope)
- **Real-time clock**: PCF85063 RTC chip for timekeeping
- **Expandable storage**: TF card slot with FAT32 support
- **Battery powered**: 3.7V lithium battery connector (18650 or LiPo depending on case variant)
- **GPIO expansion**: TCA9554PWR 8-bit I2C expander with 22-pin through-hole pads (2.54mm pitch)
- **Wireless**: WiFi 802.11 b/g/n (2.4 GHz) and Bluetooth 5.0 LE with onboard + IPEX antenna options

## Use Cases

- Compact smart home control panels
- Wearable device prototyping
- IoT sensor dashboards
- Audio recording and voice control interfaces
- Industrial monitoring displays

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-esp32-s3-touch-lcd&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export) — $33.95
- [Waveshare Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-touch-lcd-3.49.htm&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export) — $33.95

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-touch-lcd-3.49.htm&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Touch-LCD-3.49&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FESP32-S3-Touch-LCD-3.49&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)

## Tags

`esp32-s3`, `touch-display`, `ips-lcd`, `imu`, `rtc`, `audio`, `battery`, `waveshare`

## Images

![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/82cbc4a17ec2.jpg)
![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/91efb321fcd6.jpg)
![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/e8bbdc30e63a.jpg)
![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/05f95ee66b94.jpg)
![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/76ff866ed220.jpg)
![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/c92c3990ca9d.jpg)
![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/1f8ad5aadb78.jpg)
![Waveshare ESP32-S3 Touch LCD 3.49](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-touch-lcd-3-49/cfea5cc44a56.jpg)

---
[View full device page](https://openhardware.directory/devices/waveshare-esp32-s3-touch-lcd-3-49)