Espressif ESP32 S2 WROOM(-1) 4MB Module
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Espressif ESP32 S2 WROOM(-1) 4MB Module
The ESP32-S2-WROOM and ESP32-S2-WROOM-I are versatile Wi-Fi MCU modules with powerful features and a wide range of peripheral interfaces, suitable for applications such as wearable electronics and smart home devices. The ESP32-S2-WROOM uses an onboard PCB antenna, while the ESP32-S2-WROOM-I connects to an external antenna via a connector. Both modules are equipped with 4 MB of external SPI flash, and the information in this document applies to both modules.
Features
CPU and On-chip Memory
- Built-in ESP32-S2 chip, Xtensa® single-core 32-bit LX7 microprocessor, supporting clock frequencies up to 240 MHz
- 128 KB ROM
- 320 KB SRAM
- 16 KB RTC SRAM
Wi-Fi
- 802.11 b/g/n
- Data rates up to 150 Mbps in 802.11n mode
- Frame aggregation (TX/RX A-MPDU, RX A-MSDU)
- 0.4 µs guard interval
- Operating channel center frequency range: 2412 ~ 2484 MHz
Peripherals
- GPIO, SPI, UART, I2C, I2S, LCD interface, Camera interface, IR, pulse counter, LED PWM, TWAI® (ISO 11898-1 compliant, i.e., CAN 2.0 specification), full-speed USB OTG, ADC, DAC, touch sensor, temperature sensor
*Note: For detailed information on module peripherals, refer to the ESP32-S2 Series Chip Technical Reference Manual.
Module Integrated Components
- 40 MHz integrated crystal oscillator
- 4 MB SPI flash
Antenna Options
- Onboard PCB antenna (ESP32-S2-WROOM)
- External antenna via connector (ESP32-S2-WROOM-I)
Operating Conditions
- Operating voltage/power supply voltage: 3.0 ~ 3.6 V
- Operating temperature: –40 ~ 85°C
Certifications
- RF Certifications: Refer to ESP32-S2-WROOM and ESP32-S2-WROOM-I certificates
- Environmental Certifications: RoHS/REACH
Testing
- HTOL, HTSL, uHAST, TCT, ESD
ESP32-S2-WROOM(-I) Module Comparison
| Order PN | Chip embedded | Flash | PSRAM | Antenna | Dimension (mm) |
|---|---|---|---|---|---|
| ESP32-S2-WROOM (*NRND, not recommended for new designs) | ESP32-S2 | 4 MB | — | PCB onboard antenna | 18 × 31 × 3.3 |
| ESP32-S2-WROOM-I (*NRND, not recommended for new designs) | ESP32-S2 | 4 MB | — | IPEX external antenna connector | 18 × 31 × 3.3 |
Applications
- General low-power IoT sensor hub
- General low-power IoT data logger
- Camera video streaming
- OTT TV box/set-top box devices
- USB devices
- Voice recognition
- Image recognition
- Mesh networks
- Home automation
- Smart home control panels
- Smart buildings
- Industrial automation
- Smart agriculture
- Audio equipment
- Health/medical/caregiving
- Wi-Fi toys
- Wearable electronics
- Retail & Catering
- Smart POS applications
Effective Date: March 27, 2025
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