Round IPS touch display 2.1" with ESP32-S3 WiFi
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ESP32-S3 development board with a round touch display 2.1" IPS
An advanced development board based on the powerful ESP32-S3 chip, equipped with a round, capacitive IPS touch screen with a diagonal of 2.1 inches and a high resolution of 480 × 480 pixels. The module features integrated Wi-Fi 2.4GHz and Bluetooth 5 (LE) connectivity, and thanks to its large 16 MB Flash and 8 MB PSRAM memory, it enables extremely smooth operation of complex graphical interfaces (e.g., LVGL library). It is an excellent solution for rapid prototyping of smart HMI (Human-Machine Interface) panels, Smart Home systems, and IoT devices with advanced touch interaction.
Key features:
- Powerful dual-core processor ESP32-S3 (Xtensa 32-bit LX7) clocked at up to 240 MHz.
- Round screen IPS 2.1" (480 × 480 pixels, 262 thousand colors) with ST7701 driver (RGB interface).
- Single-point capacitive panel (CST820 driver) operated via I2C interface, with interrupt support.
- Wireless connectivity Wi-Fi 2.4GHz (802.11 b/g/n) and Bluetooth 5 (LE) with built-in ceramic antenna (with the option to switch to an IPEX1 connector).
- Extensive memory: 512 KB SRAM, 384 KB ROM and external chips 16 MB Flash and 8 MB PSRAM.
- Built-in 6-axis inertial measurement unit (IMU) (QMI8658) for motion and position tracking.
- Integrated real-time clock (RTC PCF85063) and a slot for microSD (TF) cards.
- Power management and lithium battery charging module 3.7V (MX1.25 connector).
- Optimized for low power consumption – flexible clock control and multiple power-saving modes.
Display parameters
- Matrix type: IPS LCD
- Screen diagonal: 2.1 inches
- Resolution: 480 × 480 pixels
- Number of displayed colors: 262 thousand (262K)
- Display interface: RGB
- LCD driver: ST7701
- Touch interface: I2C
- Touch driver: CST820 (capacitive, 1-point)
Rich expansion possibilities
The module allows for easy connection with additional peripherals thanks to exposed interfaces such as GPIO, UART, and I2C. It is an integrated platform that facilitates the construction of professional solutions based on a user interface.

Component layout on the board

- ESP32-S3R8 chip: dual-core processor (up to 240 MHz).
- QMI8658 IMU sensor: 6-axis (3-axis gyroscope and 3-axis accelerometer).
- TCA9554PWR chip: GPIO expander.
- FSUSB42UMX chip: UART selection switch (disconnects the 4-pin connector when a cable is plugged into the dedicated USB-C port).
- CH343P chip: USB-UART converter with automatic download function, requiring no manual button pressing during code uploading.
- Flash memory: 16 MB.
- PCF85063 RTC chip: precise real-time clock.
- Battery charging manager: for lithium cells.
- ME6217C33M5G stabilizer: LDO with current efficiency up to 800 mA.
- USB Type-C port: main connector (power / ESP32 programming).
- MX1.25 connector (2-pin): support for lithium batteries 3.7V (charging/discharging).
- 12-pin connector: multifunctional interface and power output.
- IPEX1 connector: optional external antenna socket (requires re-soldering the resistor jumper).
- microSD (TF) card slot: mass storage and graphics support.
- RTC battery connector: backup power for the clock.
- I2C pins: assigned to the board's internal circuits.
- UART pins: active when the USB-C UART port is not in use.
- USB Type-C port (USB TO UART): integrated serial communication.
- Buzzer: sound signaling.
- Power LED: module operation indicator.
- Charging LED: indicates the charging process of the connected battery.
- Battery power button.
- RESET button.
- BOOT button.
Board dimensions


Kit contents
- ESP32-S3-Touch-LCD-2.1B development board – 1 pcs.
- 12-pin SH1.0 cable (length approx. 100 mm) – 1 pcs.
- 4-pin SH1.0 cable (length approx. 100 mm) – 2 pcs.



