WeMos LOLIN S3 (ESP32 S3): high-resolution pinout, datasheet and specs

Renzo Mischianti

13 hours ago

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The LOLIN S3 by WeMos is a development board built around the ESP32-S3 chip, equipped with advanced features like dual USB Type-C ports for OTG and UART, significant memory enhancements with 16MB Flash and 8MB PSRAM, and versatile connectivity including a dedicated I2C port.

It supports programming with MicroPython, Arduino, and ESP-IDF, catering to a wide range of development needs. WeMos is known for creating compact, powerful, and easy-to-use development boards that are ideal for IoT projects, prototypes, and learning platforms.

Here a short selection of esp32s3 ESP32 S3 Purlple AI-S3 - YD-ESP32-S3 - ESP32-S3-DevKitC-1 - ESP32-S3-DevKitC-1 - ESP32-S3 Board screen

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Specifications

Key Component	Description
ESP32-S3-WROOM-1/1U/2	ESP32-S3-WROOM-1, ESP32-S3-WROOM-1U, and ESP32-S3-WROOM-2 are powerful, generic Wi-Fi + Bluetooth LE MCU modules that have a rich set of peripherals. They provide acceleration for neural network computing and signal processing workloads. ESP32-S3-WROOM-1 and ESP32-S3-WROOM-2 comes with a PCB antenna. ESP32-S3-WROOM-1U comes with an external antenna connector.
5 V to 3.3 V LDO	Power regulator that converts a 5 V supply into a 3.3 V output.
Pin Headers	All available GPIO pins (except for the SPI bus for flash) are broken out to the pin headers on the board for easy interfacing and programming. For details, please see Header Block.
USB-to-UART Port	A Micro-USB port used for power supply to the board, for flashing applications to the chip, as well as for communication with the chip via the on-board USB-to-UART bridge.
i2c port	It has on board SH1.0-4P port connected to the standard i2c pins
Boot Button	Download button. Holding down Boot and then pressing Reset initiates Firmware Download mode for downloading firmware through the serial port.
Reset Button	Press this button to restart the system.
USB Port	ESP32-S3 full-speed USB OTG interface, compliant with the USB 1.1 specification. The interface is used for power supply to the board, for flashing applications to the chip, for communication with the chip using USB 1.1 protocols, as well as for JTAG debugging.
USB-to-UART Bridge	Single USB-to-UART bridge chip provides transfer rates up to 3 Mbps.
RGB LED	Addressable RGB LED, driven by `GPIO48`, and you can use `LED_BUILTIN` (`38`) as normal LED.
3.3 V Power On LED	Turns on when the USB power is connected to the board.

In boards featuring ESP32-S3-WROOM-1/1U modules with Octal SPI flash/PSRAM memory, or ESP32-S3-WROOM-2 modules, the GPIO35, GPIO36, and GPIO37 pins are reserved for internal communication between the ESP32-S3 and the SPI flash/PSRAM memory.

CPU and Memory

Xtensa® dual-core 32-bit LX7 microprocessor,
up to 240 MHz
CoreMark® score:
– 1 core at 240 MHz: 613.86 CoreMark; 2.56 CoreMark/MHz
– 2 cores at 240 MHz: 1181.60 CoreMark; 4.92 CoreMark/MHz
128-bit data bus and SIMD commands
384 KB ROM
512 KB SRAM
16 KB SRAM in RTC
SPI, Dual SPI, Quad SPI, Octal SPI, QPI and OPI interfaces that allow connection to multiple flash and external RAM
Flash controller with cache is supported
Flash in-Circuit Programming (ICP) is supported

Advanced Peripheral Interfaces

45 × programmable GPIOs
Digital interfaces:
– 4 × SPI
– 1 × LCD interface (8-bit ~16-bit parallel RGB, I8080 and MOTO6800), supporting conversion between RGB565, YUV422, YUV420 and YUV411
– 1 × DVP 8-bit ~16-bit camera interface
– 3 × UART
– 2 × I2C
– 2 × I2S
– 1 × RMT (TX/RX)
– 1 × pulse counter
– LED PWM controller, up to 8 channels
– 1 × full-speed USB OTG
– 1 × USB Serial/JTAG controller
– 2 × MCPWM
– 1 × SDIO host controller with 2 slots
– General DMA controller (GDMA), with 5 transmit channels and 5 receive channels Espressif Systems 3
Submit Documentation Feedback ESP32-S3 Series Datasheet v1.6
– 1 × TWAI® controller, compatible with ISO 11898-1 (CAN Specification 2.0)
Analog interfaces:
– 2 × 12-bit SAR ADCs, up to 20 channels
– 1 × temperature sensor
– 14 × touch sensing IOs Timers:
– 4 × 54-bit general-purpose timers
– 1 × 52-bit system timer
– 3 × watchdog timers

Every variant has its Flash management.

Ordering Code	Module Integrated	Flash	PSRAM	SPI Voltage
ESP32-S3-DevKitC-1-N8	ESP32-S3-WROOM-1-N8	8 MB QD	—	3.3 V
ESP32-S3-DevKitC-1-N8R2	ESP32-S3-WROOM-1-N8R2	8 MB QD	2 MB QD	3.3 V
ESP32-S3-DevKitC-1-N8R8	ESP32-S3-WROOM-1-N8R8	8 MB QD	8 MB OT	3.3 V
ESP32-S3-DevKitC-1-N16R8V	ESP32-S3-WROOM-2-N16R8V	16 MB OT	8 MB OT	1.8 V
ESP32-S3-DevKitC-1-N32R8V	ESP32-S3-WROOM-2-N32R8V	32 MB OT	8 MB OT	1.8 V
ESP32-S3-DevKitC-1U-N8	ESP32-S3-WROOM-1U-N8	8 MB QD	—	3.3 V
ESP32-S3-DevKitC-1U-N8R2	ESP32-S3-WROOM-1U-N8R2	8 MB QD	2 MB QD	3.3 V
ESP32-S3-DevKitC-1U-N8R8	ESP32-S3-WROOM-1U-N8R8	8 MB QD	8 MB OT	3.3 V

Wi-Fi

IEEE 802.11 b/g/n-compliant
Supports 20 MHz, 40 MHz bandwidth in 2.4 GHz band
1T1R mode with data rate up to 150 Mbps
Wi-Fi Multimedia (WMM)
TX/RX A-MPDU, TX/RX A-MSDU
Immediate Block ACK
Fragmentation and defragmentation
Automatic Beacon monitoring (hardware TSF)
4 × virtual Wi-Fi interfaces
Simultaneous support for Infrastructure BSS in Station, SoftAP, or Station + SoftAP modes Note that when ESP32-S3 scans in Station mode, the SoftAP channel will change along with the Station channel
Antenna diversity
802.11mc FTM

Bluetooth

Bluetooth LE: Bluetooth 5, Bluetooth mesh
High power mode (20 dBm)
Speed: 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps
Advertising extensions
Multiple advertisement sets
Channel selection algorithm #2
Internal co-existence mechanism between Wi-Fi and Bluetooth to share the same antenna

Low Power Management

Power Management Unit with five power modes
Ultra-Low-Power (ULP) coprocessors:
– ULP-RISC-V coprocessor
– ULP-FSM coprocessor

Security

Secure boot
Flash encryption
4-Kbit OTP, up to 1792 bits for users
Cryptographic hardware acceleration:
– AES-128/256 (FIPS PUB 197)
– Hash (FIPS PUB 180-4)
– RSA
– Random Number Generator (RNG)
– HMAC
– Digital signature