ESP32-S3-Touch-LCD-2.1
- ESP32-S3-Touch-LCD-2.1 (Flat Touch Panel)
- ESP32-S3-Touch-LCD-2.1B (2.5D Curved Touch Panel)
The ESP32-S3-Touch-LCD-2.1 (Flat Touch Panel) and ESP32-S3-Touch-LCD-2.1B (2.5D Curved Touch Panel) are microcontroller development boards that support 2.4GHz Wi‑Fi and Bluetooth BLE 5. They integrate large‑capacity Flash and PSRAM, feature an onboard 2.1inch touch screen, and can smoothly run GUI applications such as LVGL. Combined with various peripheral interfaces, they enable rapid development of HMI applications based on the ESP32‑S3. It integrates large capacity Flash and PSRAM and has onboard 2.1inch capacitive touch screen, can smoothly run GUI programs such as LVGL. Combined with various peripheral interfaces, it is suitable for the quick development of the HMI and other ESP32-S3 applications.
| SKU | Product |
|---|---|
| 28169 | ESP32-S3-Touch-LCD-2.1 |
| 30697 | ESP32-S3-Touch-LCD-2.1B |
Features
- Powered by a high-performance Xtensa 32-bit LX7 dual-core processor, with a main frequency of up to 240MHz
- Supports 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) with an onboard antenna
- Onboard 512 KB SRAM, 384 KB ROM, 8 MB PSRAM, and 16 MB Flash
- Onboard 2.1inch touch screen, 480 × 480 resolution, 262K colors
- Supports I2C interface for touch control, with interrupt support
- Exposes UART, I2C, and some I/O interfaces; integrated full‑speed USB serial port
- Onboard QMI8658 6-axis IMU, RTC clock sensor, TF card slot and battery charging management module, etc.
- Supports flexible clock control and various power modes for low-power scenarios
Onboard Resources
- ESP32-S3R8 Dual-core processor, operating frequency up to 240MHz
- QST Attitude Sensor QMI8658 (6‑axis gyroscope + accelerometer)
- TCA9554PWR GPIO expander chip, all pins used, not brought out
- FSUSB42UMX UART selection chip: when the UART Type‑C is connected, the 4Pin UART is disabled; when the UART Type‑C is not connected, the 4Pin UART is enabled
- CH343P USB‑to‑UART converter with an onboard automatic download circuit, allowing program flashing without extra steps
- 16MB Flash
- RTC Chip PCF85063 RTC clock
- Battery Charging Management Chip
- ME6217C33M5G Low dropout LDO, current (Max) 800mA
- USB Type-C Port
- Battery Header MX1.25 2PIN connector for 3.7V lithium battery, supports charging and discharging
- 12PIN Multi‑function Interface
- IPEX1 Connector Switching to use the external antenna via resoldering an onboard resistor
- TF card slot
- RTC Battery Header For connecting a rechargeable RTC battery
- I2C Header Connected to other onboard chips; only for connecting external I2C devices, cannot be remapped to other functions
- UART Header This interface is not available when the USB TO UART Type‑C interface is connected
- USB TO UART Type‑C Port For programming, debugging, and power supply
- Buzzer
- Power Indicator
- Charging Indicator When a system battery is connected, it stays on while charging and turns off when fully charged (status indeterminate when no system battery is connected)
- Battery Power Control Switch
- RESET Button
- BOOT Button
Interface Description
When using the ESP32-S3-LCD-2.1/2.1B, it is important to understand the following interface descriptions.
12PIN Wire Interface Pin Mapping Table (click to expand)
| Pin Label | Function | Description |
|---|---|---|
| GND | GND | Power ground |
| VBus | 5V | USB power |
| D- | USB differential (GPIO19) | USB differential or GPIO |
| D+ | USB differential (GPIO20) | USB differential or GPIO |
| GND | GND | Power ground |
| 3V3 | 3V3 | 3.3V output |
| SCL | SCL (GPIO7) | I2C clock line, cannot be used as a regular GPIO |
| SDA | SDA (GPIO15) | I2C data line, cannot be used as a regular GPIO |
| TXD | TXD (GPIO43) | UART data transmit or can be used as a regular GPIO |
| RXD | RXD (GPIO44) | UART data receive or can be used as a regular GPIO |
| NC | NC | No pin connection |
| IO0 | GPIO0 | Spare GPIO pin |
I2C Interface Pin Mapping Table (click to expand)
| Pin Label | Function | Description |
|---|---|---|
| GND | GND | Power ground |
| 3V3 | 3V3 | 3.3V output |
| SCL | SCL (GPIO7) | I2C clock line, cannot be used as a regular GPIO |
| SDA | SDA (GPIO15) | I2C data line, cannot be used as a regular GPIO |
UART Interface Pin Mapping Table (click to expand)
| Pin Label | Function | Description |
|---|---|---|
| GND | GND | Power ground |
| 3V3 | 3V3 | 3.3V output |
| TXD | TXD (GPIO43) | UART data transmit or can be used as a regular GPIO |
| RXD | RXD (GPIO44) | UART data receive or can be used as a regular GPIO |
Dimensions
Development Methods
The ESP32-S3-Touch-LCD-2.1 supports two development frameworks: Arduino IDE and ESP-IDF, providing flexibility for developers to choose the tool that best fits their project requirements and personal preference.
Both development methods have their own advantages. Developers can choose based on their needs and skill levels. Arduino is simple to learn and quick to start, suitable for beginners and non-professionals. ESP-IDF provides more advanced development tools and stronger control capabilities, suitable for developers with professional backgrounds or higher performance requirements, and is more appropriate for complex project development.
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Arduino IDE is a convenient, flexible, and easy-to-use open-source electronics prototyping platform. It requires minimal foundational knowledge, allowing for rapid development after a short learning period. Arduino has a huge global user community, providing a vast amount of open-source code, project examples, and tutorials, as well as a rich library ecosystem that encapsulates complex functions, enabling developers to implement various features rapidly. You can refer to the Working with Arduino to complete the initial setup, and the tutorial also provides related demos for reference.
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ESP-IDF, short for Espressif IoT Development Framework, is a professional development framework launched by Espressif Systems for its ESP series of chips. It is based on C language development and includes compilers, debuggers, flashing tools, etc. It supports development via command line or integrated development environments (such as Visual Studio Code with the Espressif IDF plugin), which provides features like code navigation, project management, and debugging. We recommend using VS Code for development. For the specific configuration process, please refer to the Working with ESP-IDF. The tutorial also provides relevant demos for reference.