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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →The WEMOS LOLIN S3 Pro is an ESP32-S3 development board that adds a built-in MicroSD/TF slot, a connector intended for TFT or EPD displays, an I2C port and battery charging support. WEMOS lists MicroPython as its default firmware, with Arduino and ESP-IDF also supported. The manufacturer does not identify a specific compatible display model, so verify the connector and pinout before choosing a screen.
What the LOLIN S3 Pro adds
The LOLIN S3 Pro pairs an ESP32-S3-WROOM-1 implementation with integrated expansion connections. That makes it a candidate for projects needing removable storage, a display connection or battery-powered operation without adding every interface as a separate module.
- MicroSD/TF slot: for removable storage. WEMOS does not state supported card capacities or speed classes in its product documentation.
- Display port: intended for TFT or EPD displays.
- LOLIN I2C port: for connecting compatible I2C peripherals.
- Battery port: includes 500mA charging support.
These feature descriptions come from WEMOS’s S3 Pro documentation.
LOLIN S3 Pro specifications
| Specification | WEMOS-listed value |
|---|---|
| Processor platform | ESP32-S3-WROOM-1 |
| Flash | 16MB Quad SPI |
| PSRAM | 8MB Octal SPI |
| Clock speed | 240MHz |
| Digital I/O | 25 pins |
| Operating voltage | 3.3V |
| Dimensions | 65.3 × 25.4mm |
| Weight | 7.2g |
| Battery charging | 500mA |
These are specifications published on WEMOS’s product page, which is undated; they are not independent measurements.
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#1 Best Overall
- POWERFUL ESP32-S3 PLATFORM: Dual-core Xtensa LX7 processor running at up to 240 MHz provides the performance needed for IoT, robotics, automation, audio processing and edge-AI projects.
- 16MB FLASH AND 8MB PSRAM: The ESP32-S3-WROOM-1 N16R8 module provides expanded memory for complex Arduino, MicroPython, ESP-IDF and PlatformIO applications.
- ONBOARD MICROSD CARD SLOT: Add removable local storage for sensor logs, configuration files, audio, images and other project data without wiring a separate storage module.
- WI-FI AND BLUETOOTH 5 LE: Integrated 2.4 GHz Wi-Fi 802.11 b/g/n and Bluetooth Low Energy support connected sensors, smart devices, wireless controllers and IoT prototypes.
- FLEXIBLE DEVELOPMENT INTERFACES: USB Type-C and support for GPIO, SPI, I2C, UART, ADC, PWM and USB OTG provide flexible connections for displays, sensors, actuators and other components.
Which displays work with the S3 Pro?
WEMOS describes the board’s display port as intended for TFT and EPD displays, but its product page does not name a confirmed display model, cable, connector pinout or display driver. The port description alone is not enough to guarantee that a particular screen will work.
CNX Software’s November 28, 2022 launch article suggested that a 2.4-inch TFT and 10-pin cable might work. That is a reported inference, not manufacturer-confirmed compatibility. Before buying, compare the display’s connector and pinout with the board, and verify its voltage and software-driver support. See CNX Software’s launch coverage for that dated suggestion.
Rank #2
- The expansion board allows for the connection of an external 3.7V lithium battery and supports charging the battery via USB
- The ESP32-C3 SUPERMINI expansion board is specifically designed for the ESP32-C3 SUPERMINI development board. It addresses many limitations of the ESP32C3 SUPERMINI development board.
- If a higher voltage output is required, you can short the PCB (as shown in the image below). In this case, VCC1 and VCC2will output the power supply voltage of 3.7V.
- The expansion board provides a better power supply solution, featuring two power outputs: VCC1 and VCC2 for ESP32-C3/ ESP32-S3 /ESP32-H2 /ESP32-C6
- All 10 GPIO pins are extended, making it convenient for users to connect various sensors.
Firmware and development options
WEMOS lists MicroPython as the default firmware and names Arduino and ESP-IDF as supported development frameworks. Its documentation states: “Default firmware: MicroPython.”
For PlatformIO, the board ID is lolin_s3_pro. PlatformIO also notes that the board has no onboard debug probe, so hardware debugging requires an external probe. Its setup information is on the PlatformIO LOLIN S3 Pro page.
Rank #3
- 【18650 Battery】Upgrade "battery" integrates ESP8266 battery slot, makes it easier to develope ESP8266 project .SMT connector available for sleep mode; Additional LED Programmable.
- 【Premium Performance】18650 charge system integration. LED indicator (green for full, red for charging) can be used while charging.
- 【High Quality】18650 battery is made of high quality material which can use for a long time, can run almost 17 hours if it is put into a standard 3000mah battery.
- 【Note】 The positive and negative direction of the battery must be placed correctly,otherwise the charging chip will be damaged.overercharge protection; over discharge protection.
- Thank you very much for shopping in our store. Please feel free to contact us if you have any questions.
WEMOS’s Arduino setup guide for the S3 series calls for Python, Arduino IDE and a CH340 driver, and tells users to select “LOLIN S3.” Because that line does not explicitly say “LOLIN S3 Pro,” check the board definitions available in your installed package and choose the matching definition rather than assuming the label is identical.
CircuitPython also has a dedicated LOLIN S3 Pro download page. The version shown there can change, so check the page for the current release before installing firmware.
Rank #4
- This expansion board module is safe, reliable, and can be extended to various application; it is made of high-quality materials, with good stability and high reliability
- This expansion board module is safe, reliable, and can be extended to various application; it is made of high-quality materials, with good stability and high reliability
- Broad Compatibility: The ESP32 S3 Breakout Board Features a standard 44-pin GPIO interface, perfectly compatible with 44-pin development boards like the ESP32-S3 N8R2/N16R8/N8R8
- ESP32-S3 N16R8 16MB Flash 8MB PSRAM,Dual USB-C, WiFi BLE 5.0 for Arduino IDE, MicroPython, ESP-IDF, C/C++
- Package: You will get 2PCS ESP32 S3 Breakout Board GPIO 1 into 2+2PCS ESP32-S3 N16R8
How it differs from the LOLIN S3
CNX Software described the Pro as an adaptation of the LOLIN S3, adding a display connector and MicroSD socket alongside LiPo charging support. Its November 2022 coverage also noted that the Pro has one USB port, fewer header I/O than the other board and no RGB LED. Those are launch-era comparison details; consult current manufacturer documentation when choosing between board revisions.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price and availability
CNX Software reported a launch-era AliExpress price of $9.50 plus shipping in its November 28, 2022 article. That is historical pricing, not a current quote or confirmation of stock. WEMOS’s product page links to a purchase route, but current sellers, availability and price are not established here. Check a seller’s current listing and confirm the exact board revision before ordering.
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Quick Recap
Best Value
- ESP32-S3-Zero development board based on ESP32-S3FH4R2, equipped with 32-bit LX7 dual-core processor, up to 240MHz main frequency
- ESP32-S3 Mini board supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE), built in 512KB of SRAM and 384KB ROM, onboard 4MB Flash memory and 2MB PSRAM
- Integrated with USB serial port full-speed controller, 34 × GPIO pins allows flexibly configuring pin functions, 4 × SPI, 2 × I2C, 3 × UART, 2 × I2S, 2 × ADC, etc.
- Supports flexible clock, module power supply independent setting, and other controls to realize low power consumption in different scenarios
- Castellated module and onboard ceramic antenna, allows soldering direct to carrier boards, suitable For SMD Applications
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
