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

High-resolution image

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

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

How to

1. ESP32: pinout, specs and Arduino IDE configuration
2. ESP32: integrated SPIFFS Filesystem
3. ESP32: manage multiple Serial and logging
4. ESP32 practical power saving
   1. ESP32 practical power saving: manage WiFi and CPU
   2. ESP32 practical power saving: modem and light sleep
   3. ESP32 practical power saving: deep sleep and hibernation
   4. ESP32 practical power saving: preserve data, timer and touch wake up
   5. ESP32 practical power saving: external and ULP wake up
   6. ESP32 practical power saving: UART and GPIO wake up
5. ESP32: integrated LittleFS FileSystem
6. ESP32: integrated FFat (Fat/exFAT) FileSystem
7. ESP32-wroom-32
   1. ESP32-wroom-32: flash, pinout, specs and IDE configuration
8. ESP32-CAM
   1. ESP32-CAM: pinout, specs and Arduino IDE configuration
   2. ESP32-CAM: upgrade CamerWebServer with flash features
9. ESP32: use ethernet w5500 with plain (HTTP) and SSL (HTTPS)
10. ESP32: use ethernet enc28j60 with plain (HTTP) and SSL (HTTPS)
11. How to use SD card with esp32
12. esp32 and esp8266: FAT filesystem on external SPI flash memory

13. Firmware and OTA update management
    1. Firmware management
       1. ESP32: flash compiled firmware (.bin)
       2. ESP32: flash compiled firmware and filesystem (.bin) with GUI tools
    2. OTA update with Arduino IDE
       1. ESP32 OTA update with Arduino IDE: filesystem, firmware, and password
    3. OTA update with Web Browser
       1. ESP32 OTA update with Web Browser: firmware, filesystem, and authentication
       2. ESP32 OTA update with Web Browser: upload in HTTPS (SSL/TLS) with self-signed certificate
       3. ESP32 OTA update with Web Browser: custom web interface
    4. Self OTA uptate from HTTP server
       1. ESP32 self OTA update firmware from the server
       2. ESP32 self OTA update firmware from the server with version check
       3. ESP32 self-OTA update in HTTPS (SSL/TLS) with trusted self-signed certificate
    5. Non-standard Firmware update
       1. ESP32 firmware and filesystem update from SD card
       2. ESP32 firmware and filesystem update with FTP client

14. Integrating LAN8720 with ESP32 for Ethernet Connectivity with plain (HTTP) and SSL (HTTPS)
15. Connecting the EByte E70 to ESP32 c3/s3 devices and a simple sketch example
16. ESP32-C3: pinout, specs and Arduino IDE configuration
17. Integrating W5500 with ESP32 Using Core 3: Native Ethernet Protocol Support with SSL and Other Features
18. Integrating LAN8720 with ESP32 Using Core 3: Native Ethernet Protocol Support with SSL and Other Features
19. Dallas ds18b20:
    • Dallas ds18b20 with esp32 and esp8266: introduction and parasite mode
    • Dallas ds18b20 with esp32 and esp8266: pull-up P-MOSFET gate and alarms
    • Dallas ds18b20 with esp32 and esp8266: all OneWire topologies, long stubs and more devices

Datasheet

ESP32s3 datasheet

Board Schematic

PCB size

Thanks

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