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.
$33.95
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Specifications
Components
Xtensa LX7 dual-core processor at 240MHz with integrated WiFi and Bluetooth 5.0 LE, 512KB SRAM and 8MB stacked PSRAM
172x640 IPS LCD with 16.7M colors, 350 cd/m² brightness, 1200:1 contrast, driven via QSPI interface with I2C capacitive touch
3-axis accelerometer and 3-axis gyroscope for motion sensing and orientation detection
Low-power I2C real-time clock/calendar chip for accurate timekeeping with battery backup support
Low-power mono audio codec with integrated DAC for speaker output
High-performance 4-channel audio ADC for dual microphone array input with noise reduction
8-bit I2C-bus and SMBus I/O expander providing additional GPIO pins
Bus Interfaces
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
Use Cases
5Embedded UI
Embedded graphical user interfaces for touchscreen devices, control panels, and custom displays.
Smart Home Dashboard
Wall-mounted or tabletop display showing Home Assistant dashboards, sensor readings, and smart home controls.
industrial-hmi
IoT Dashboard
Display real-time IoT sensor data on an embedded screen for local monitoring.
wearable-device
Resources
Where to Buy
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