The ESP32-S3-MINI-1 and ESP32-S3-MINI-1U are general-purpose Wi-Fi + Bluetooth Low Energy MCU modules, offering powerful functionality with a wide range of peripheral interfaces. The modules are optimized in size, making them suitable for embedded systems, smart home devices, wearable electronics, and other IoT scenarios. The ESP32-S3-MINI-1 features a PCB onboard antenna, while the ESP32-S3-MINI-1U uses a connector for an external antenna. Both modules come with up to 8 MB of SPI flash, with some versions featuring 2 MB of SPI PSRAM.
Features
CPU and On-Chip Memory
- Integrated ESP32-S3 chip with Xtensa® dual-core 32-bit LX7 microprocessor (supports single-precision floating-point unit) with clock frequency up to 240 MHz
- 384 KB ROM
- 512 KB SRAM
- 16 KB RTC SRAM
- Up to 8 MB Quad SPI flash
- 2 MB embedded PSRAM (only for ESP32-S3FH4R2 chip)
Wi-Fi
- Supports 802.11 b/g/n
- Data rates up to 150 Mbps in 802.11n mode
- Frame aggregation (TX/RX A-MPDU, TX/RX A-MSDU)
- 0.4 µs guard interval
- Operating channel center frequency range: 2412 ~ 2484 MHz
Bluetooth
- Bluetooth Low Energy (Bluetooth LE): Bluetooth 5, Bluetooth mesh
- Supports data rates of 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps
- Advertising Extensions
- Multiple Advertisement Sets
- Channel Selection Algorithm #2
- Coexistence of Wi-Fi and Bluetooth with shared antenna
Peripherals
- GPIO, SPI, LCD interface, Camera interface, UART, I2C, I2S, Infrared remote, Pulse counter, LED PWM, Full-speed USB 2.0 OTG, USB Serial/JTAG controller, MCPWM, SDIO host interface, GDMA, TWAI® (compatible with ISO 11898-1, CAN 2.0), ADC, Touch sensor, Temperature sensor, Timers, and Watchdog
Module Integrated Components
- 40 MHz integrated crystal oscillator
Antenna Options
- Onboard PCB antenna (ESP32-S3-MINI-1)
- Connector for external antenna (ESP32-S3-MINI-1U)
Operating Conditions
- Operating voltage/power supply voltage: 3.0 ~ 3.6 V
- Operating temperature range: –40 ~ 85 °C
Certifications
- Environmental Certifications: RoHS/REACH
Testing
- HTOL/HTSL/uHAST/TCT/ESD
Comparison of ESP32-S3-MINI-1 and ESP32-S3-MINI-1U Series Models
| Model Number | Flash | PSRAM | Operating Temperature (°C) | Module Dimensions (mm) |
|---|---|---|---|---|
| ESP32-S3-MINI-1-N8 | 8 MB (Quad SPI) | - | –40 ~ 85 | 15.4 × 20.5 × 2.4 |
| ESP32-S3-MINI-1-N4R2 | 4 MB (Quad SPI) | 2 MB (Quad SPI) | –40 ~ 85 | 15.4 × 15.4 × 2.4 |
| ESP32-S3-MINI-1U-N8 | 8 MB (Quad SPI) | - | –40 ~ 85 | 15.4 × 20.5 × 2.4 |
| ESP32-S3-MINI-1U-N4R2 | 4 MB (Quad SPI) | 2 MB (Quad SPI) | –40 ~ 85 | 15.4 × 15.4 × 2.4 |