Component Header
| Parameter | Details |
| Manufacturer | Espressif Systems |
| Component Category | Wireless MCU Module |
| Component Type | 2.4 GHz Wi-Fi + Bluetooth LE MCU Module |
| Main Function | Wireless connectivity + embedded processing |
| Integrated SoC | ESP32-S3 |
| CPU | Dual-core 32-bit Xtensa LX7 |
| Maximum CPU Frequency | 240 MHz |
| Flash Options | 4 MB, 8 MB or 16 MB Quad SPI |
| PSRAM Options | None, 2 MB Quad SPI, 8 MB Octal SPI, or 16 MB Octal SPI depending on variant |
| Antenna | Integrated PCB antenna |
| Module Size | 18.0 × 25.5 × 3.1 mm |
| Supply Voltage | 3.0–3.6 V |
| Operating Temperature | Depends on variant: –40 to +65 °C, –40 to +85 °C or –40 to +105 °C |
| GPIO | Up to 36 |
| Lifecycle | Refer to current Espressif product documentation for exact ordering variant |
The ESP32-S3-WROOM-1 is a module family rather than one single memory configuration. The exact MPN suffix determines flash, PSRAM and temperature rating.
Quick Summary
The ESP32-S3-WROOM-1 is a high-performance Wi-Fi + Bluetooth LE MCU module based on Espressif’s ESP32-S3 SoC. It combines a dual-core 32-bit Xtensa LX7 processor operating up to 240 MHz with extensive peripherals, wireless connectivity, optional PSRAM and up to 16 MB flash depending on the variant.
It is particularly suitable for connected products requiring more processing, memory and peripheral capability than entry-level ESP32 modules, including AIoT devices, smart displays, audio products, cameras, smart-home equipment and industrial IoT products.
What Is It?
The ESP32-S3-WROOM-1 is a compact module that integrates the ESP32-S3 SoC with flash memory, optional PSRAM, a 40 MHz crystal oscillator, RF circuitry and a PCB antenna.
The ESP32-S3 provides a dual-core Xtensa LX7 CPU with a maximum frequency of 240 MHz, Wi-Fi 802.11b/g/n, Bluetooth 5 LE and a large peripheral set. It also includes hardware acceleration intended for neural-network computing and signal-processing workloads.
The module exposes up to 36 GPIOs and provides interfaces including SPI, UART, I²C, I²S, USB 2.0 Full-Speed OTG, USB Serial/JTAG, SD/MMC, camera, LCD, TWAI and motor-control PWM.
Key Specifications
| Parameter | Specification |
| SoC | ESP32-S3 |
| CPU | Dual-core Xtensa LX7 32-bit |
| Maximum CPU Frequency | 240 MHz |
| FPU | Single-precision floating-point unit |
| ROM | 384 KB |
| Internal SRAM | 512 KB |
| RTC SRAM | 16 KB |
| Flash | 4 MB / 8 MB / 16 MB depending on variant |
| Flash Interface | Quad SPI |
| PSRAM | None / 2 MB Quad SPI / 8 MB Octal SPI / 16 MB Octal SPI depending on variant |
| Wi-Fi | IEEE 802.11 b/g/n |
| Wi-Fi Frequency | 2.4 GHz |
| Maximum Wi-Fi Data Rate | Up to 150 Mbps |
| Bluetooth | Bluetooth 5 LE |
| Bluetooth LE Data Rates | 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps |
| GPIO | Up to 36 |
| ADC | 12-bit SAR ADC |
| Touch Sensor | Yes |
| UART | 3 |
| SPI | 4 |
| I²C | 2 |
| I²S | 2 |
| USB | USB 2.0 Full-Speed OTG + USB Serial/JTAG |
| TWAI | 2 controllers |
| SD/MMC | SD/MMC Host |
| Camera Interface | Yes |
| LCD Interface | Yes |
| Supply Voltage | 3.0–3.6 V |
| Module Dimensions | 18.0 × 25.5 × 3.1 mm |
| Antenna | PCB antenna |
| Operating Temperature | Variant dependent |
The exact memory configuration and temperature range must be taken from the selected ordering code. For example, ESP32-S3-WROOM-1-N8 provides 8 MB Quad SPI flash with no PSRAM, while ESP32-S3-WROOM-1-N8R8 provides 8 MB Quad SPI flash and 8 MB Octal SPI PSRAM.
Key Features
- Dual-core 32-bit Xtensa LX7 processor up to 240 MHz
- 2.4 GHz 802.11b/g/n Wi-Fi
- Bluetooth 5 LE
- Up to 16 MB Quad SPI flash
- Optional PSRAM up to 16 MB depending on variant
- Up to 36 GPIOs
- USB 2.0 Full-Speed OTG
- USB Serial/JTAG
- Hardware acceleration for neural-network and signal-processing workloads
- Integrated PCB antenna
- Extensive peripheral set including LCD, camera, SD/MMC and TWAI interfaces
Typical Applications
- AIoT devices
- Smart-home controllers
- Smart appliances
- Smart control panels
- Smart displays
- Smart speakers
- Voice-command products
- Camera-based embedded products
- Wireless industrial controllers
- Connected instrumentation
- Audio processing devices
- IoT gateways
Espressif specifically identifies applications such as wake-word detection, speech-command recognition, face detection/recognition, smart home, smart appliances, smart control panels and smart speakers for this module family.
Interfaces / Functions
| Interface / Function | Practical Use |
| GPIO | Digital I/O and peripheral functions |
| UART | Debugging and external serial devices |
| SPI | Displays, memory and high-speed peripherals |
| I²C | Sensors and peripheral ICs |
| I²S | Digital audio |
| USB OTG | USB host/device applications |
| USB Serial/JTAG | Programming and debugging |
| TWAI | CAN 2.0-compatible controller |
| SD/MMC | External storage |
| LCD Interface | Displays |
| Camera Interface | Image sensors |
| ADC | Analog measurement |
| Touch Sensor | Capacitive touch input |
| MCPWM | Motor and power-control applications |
| LEDC | LED and PWM control |
| Wi-Fi | Network connectivity |
| Bluetooth LE | Short-range wireless connectivity |
The ESP32-S3’s peripheral set is one of the major reasons to select the module over smaller ESP32 variants.
Power Requirements
The ESP32-S3-WROOM-1 operates from a 3.0–3.6 V supply. The module should be supplied from a stable 3.3 V rail with adequate current capability for wireless operation and transient loads.
For product designs, the power supply should be evaluated against the actual operating mode rather than using a single nominal MCU-current value.
Important considerations include:
- Wi-Fi transmission current
- Bluetooth LE transmission current
- CPU loading
- PSRAM activity
- USB operation
- External peripheral loading
- Sleep-mode requirements
Use Espressif’s electrical characteristics and reference design when sizing the regulator and decoupling network.
Why Use This Component?
An engineer may select ESP32-S3-WROOM-1 when the design requires:
- Higher processing performance than entry-level ESP32 modules
- Dual-core processing
- Wi-Fi + Bluetooth LE
- Large GPIO count
- Optional PSRAM
- Large flash configurations
- USB OTG
- Camera interface
- LCD interface
- Digital audio interfaces
- Neural-network/signal-processing acceleration
- Integrated wireless antenna
- A broad peripheral set in a module format
The combination of dual-core processing, optional PSRAM, USB, camera/LCD interfaces and AI-oriented acceleration makes the ESP32-S3 particularly suitable for more complex embedded products.
When Not to Use It
Consider another component or module when:
- The application only requires a simple low-cost Wi-Fi MCU.
- The available processing capability is unnecessary for the product.
- The module footprint is too large.
- 5 GHz Wi-Fi is required.
- Wi-Fi 6 is required.
- Thread or Zigbee/802.15.4 connectivity is required.
- An external RF antenna is mandatory.
- The selected memory configuration does not meet the application requirements.
- A temperature range outside the selected variant’s rating is required.
- The application has extremely tight power-consumption requirements where a lower-power architecture would be more appropriate.
For applications where the ESP32-S3’s additional processing and peripheral capability is not needed, a smaller ESP32-C3-based module may provide a simpler hardware solution.
Key Selection Considerations
Before selecting ESP32-S3-WROOM-1, verify:
- Exact flash requirement
- PSRAM requirement
- CPU performance requirement
- GPIO count
- Required UART/SPI/I²C/I²S interfaces
- USB requirements
- Camera or LCD interface requirements
- Required Wi-Fi functionality
- Bluetooth LE requirements
- Supply voltage
- Wireless peak-current requirements
- Antenna placement
- Required operating temperature
- Module dimensions
- Production availability of the exact MPN
- Required regulatory/certification requirements
- ESP-IDF/software compatibility
Design Considerations
Power Supply
Provide a stable 3.3 V supply with adequate transient-current capability. Wireless transmission and high processor activity can produce substantially greater current demand than idle operation.
Decoupling
Follow Espressif’s reference schematic and place supply bypass capacitors close to the relevant power connections.
Boot and Strapping Pins
The ESP32-S3 uses strapping pins during reset and boot. External circuitry connected to these pins must not unintentionally force an undesired boot configuration.
USB
If USB OTG or USB Serial/JTAG is used, the USB signals should be routed according to Espressif’s hardware design recommendations.
PSRAM
For variants containing PSRAM, verify the memory interface configuration and PCB requirements for the specific PSRAM type.
Peripheral Pin Assignment
ESP32-S3 provides extensive GPIO multiplexing. Verify the final pin assignment against the module’s pin restrictions before PCB release.
RF
The integrated PCB antenna requires appropriate placement and clearance. The final enclosure and surrounding PCB copper can affect RF performance.
PCB / Layout Considerations
The antenna area is the most important PCB consideration for the ESP32-S3-WROOM-1.
- Follow Espressif’s recommended antenna placement.
- Maintain the specified antenna clearance.
- Avoid unnecessary copper and metal around the antenna.
- Keep noisy digital/high-current routing away from the antenna region.
- Provide a suitable ground plane.
- Place supply decoupling close to the module.
- Follow the recommended module land pattern.
- Consider the enclosure and nearby mechanical metal when positioning the antenna.
- Follow Espressif’s USB routing recommendations when USB is used.
- Follow the appropriate high-speed memory recommendations for variants using PSRAM.
The ESP32-S3-WROOM-1 uses an integrated PCB antenna, while the WROOM-1U version provides an external antenna connector.
Equivalent ICs / Alternatives
The ESP32-S3-WROOM-1 is a module family with multiple memory and temperature configurations. Therefore, alternatives should be selected based on the exact application rather than treating every ESP32-S3-WROOM-1 variant as identical.
ESP32-S3-WROOM-1-N8
Manufacturer: Espressif Systems
Description: 8 MB Quad SPI flash version without PSRAM.
Major Difference: Provides more flash than N4 while retaining the standard 85 °C temperature range.
Compatibility: Same Module Family
ESP32-S3-WROOM-1-N8R8
Manufacturer: Espressif Systems
Description: 8 MB Quad SPI flash + 8 MB Octal SPI PSRAM.
Major Difference: Adds 8 MB PSRAM for applications requiring additional runtime memory.
Compatibility: Same Module Family — Verify Memory Configuration
ESP32-S3-WROOM-1-N16R16VA
Manufacturer: Espressif Systems
Description: 16 MB Quad SPI flash + 16 MB Octal SPI PSRAM.
Major Difference: Significantly larger memory configuration for demanding applications.
Compatibility: Same Module Family — Verify Software and Memory Requirements
ESP32-S3-WROOM-1U
Manufacturer: Espressif Systems
Description: ESP32-S3-WROOM module using an external antenna connection instead of the WROOM-1 PCB antenna.
Major Difference: Different antenna implementation and mechanical dimensions.
Compatibility: Alternative with Design Changes
The WROOM-1U measures approximately 18.0 × 19.2 × 3.2 mm, compared with 18.0 × 25.5 × 3.1 mm for WROOM-1.
ESP32-S3-MINI-1
Manufacturer: Espressif Systems
Description: Smaller ESP32-S3 module family with Wi-Fi and Bluetooth LE.
Major Difference: Smaller module format with a different mechanical footprint and module configuration.
Compatibility: Alternative with Design Changes
Use when PCB area is more important than the larger WROOM-1 module format.
Where to Buy
The exact ordering code should be specified when purchasing because ESP32-S3-WROOM-1 is available in multiple flash, PSRAM and temperature configurations.
Potential distributors include:
- DigiKey
- Mouser
- Arrow
- element14 / Newark
- LCSC
- RS
ICDigest purchasing note: Stock, pricing and regional availability are dynamic and should be verified at the time of procurement. The distributor should not be considered an official manufacturer source unless that relationship is independently verified.
Manufacturer & Datasheet
Manufacturer: Espressif Systems
Official product page:
https://www.espressif.com/en/module/esp32-s3-wroom-1-en
Official module datasheet:
ESP32-S3-WROOM-1 & WROOM-1U Datasheet, Version 1.8, March 2, 2026.
Additional official documentation:
- ESP32-S3 Series Datasheet
- ESP32-S3 Technical Reference Manual
- ESP32-S3 Hardware Design Guidelines
- ESP-IDF Programming Guide
The module datasheet should remain the primary reference for module-specific electrical, mechanical, pinout and antenna information.
FAQ
What is ESP32-S3-WROOM-1?
ESP32-S3-WROOM-1 is a Wi-Fi + Bluetooth LE MCU module based on Espressif’s ESP32-S3 SoC. It combines a dual-core 240 MHz processor with flash, an integrated PCB antenna and extensive peripherals.
Does ESP32-S3-WROOM-1 support Wi-Fi?
Yes. It supports 2.4 GHz IEEE 802.11b/g/n Wi-Fi with a maximum 802.11n data rate of up to 150 Mbps.
Does ESP32-S3-WROOM-1 support Bluetooth?
Yes. It supports Bluetooth 5 LE, including Bluetooth Mesh and LE data rates from 125 Kbps to 2 Mbps.
How much flash does ESP32-S3-WROOM-1 have?
It depends on the ordering code. The family includes 4 MB, 8 MB and 16 MB Quad SPI flash variants.
Does ESP32-S3-WROOM-1 have PSRAM?
Some variants do. The family includes versions with 2 MB Quad SPI, 8 MB Octal SPI and 16 MB Octal SPI PSRAM, as well as versions without PSRAM. The exact MPN must therefore be checked before selecting the memory configuration.
What is the difference between ESP32-S3-WROOM-1 and ESP32-S3-WROOM-1U?
The main difference is the antenna implementation. WROOM-1 has an integrated PCB antenna, while WROOM-1U uses an external antenna connector. Their mechanical dimensions are also different.
Does ESP32-S3 have a CAN interface?
The ESP32-S3 provides TWAI controllers compatible with ISO 11898-1. Like other ESP32 devices with TWAI, an external physical-layer CAN transceiver is required to connect to a physical CAN bus.
Is ESP32-S3 suitable for AI applications?
The ESP32-S3 includes acceleration features intended for neural-network computing and signal-processing workloads, which is one reason Espressif positions the module for AIoT applications such as wake-word detection, speech commands and face-related applications.
ICDigest Engineering Takeaway
The ESP32-S3-WROOM-1 is a higher-performance ESP32 module intended for applications that need more processing, memory and peripheral capability than simpler ESP32 modules.
Its main selection advantages are the dual-core 240 MHz CPU, Wi-Fi + Bluetooth LE, up to 36 GPIOs, optional PSRAM, USB OTG, camera/LCD interfaces and AI/signal-processing acceleration.
The most important selection point is to choose the exact WROOM-1 ordering code first. Flash size, PSRAM configuration and operating-temperature rating vary substantially between variants, so ESP32-S3-WROOM-1 should not be treated as a single fixed specification part number.