Seeed Studio XIAO ESP32-S3 Review: Compact Power for IoT Projects

What it is

Seeed Studio XIAO ESP32-S3 — Seeed Studio SKU 113991114

Specifications

Processor

ESP32-S3R8, Xtensa LX7 dual-core up to 240 MHz Source

Wireless

2.4 GHz Wi-Fi; Bluetooth Low Energy 5.0 / Bluetooth Mesh Source

Memory

8 MB PSRAM and 8 MB Flash Source

I/O

11 GPIO (PWM), 9 ADC, UART, I2C and SPI Source

Dimensions

21 x 17.8 mm Source

Verified price

USD 7.49; in stock when checked 2026-10-10 Source

Use cases

• Compact Wi-Fi/BLE sensor nodes
• Smart irrigation and home-automation controllers
• Embedded prototypes needing more memory than ESP32-C3 class boards
• Space-constrained maker and robotics projects

Evidence / testing

• Research-based review using current Seeed Studio product and technical documentation.
• ITHutir has not yet published hands-on benchmark or long-term reliability testing for this board.

Advantages

• Dual-core 240 MHz ESP32-S3 with substantially more memory than XIAO ESP32-C3
• Very small 21 x 17.8 mm form factor
• Wi-Fi and BLE 5.0 in the same board
• Verified low-cost direct product offer from an approved affiliate merchant

Limitations

• No ITHutir hands-on test evidence yet
• Fewer broken-out pins than larger ESP32 development boards
• Power consumption and RF performance depend on firmware, antenna placement and workload
• Current price and stock can change

Alternatives

• Seeed Studio XIAO ESP32-C3 Review: Budget Compact Wi-Fi/BLE Board

Who it may suit

• Makers building compact connected devices
• IoT developers who need more processing and memory headroom
• Builders who value a small board over maximum pin count

Current purchasing options