WiFi 802.11a/b/g/n, Bluetooth v5.0 Transceiver Module 2.4GHz PCB Trace
The ESP32-S3-WROOM-1-N8R2 is a compact, low-power Wi-Fi and Bluetooth® Low Energy (BLE) module developed by Espressif Systems. It is based on the ESP32-S3 system-on-chip (SoC), which integrates a dual-core Xtensa® LX7 processor optimized for high performance and edge AI processing.
This module includes 8 MB of external SPI flash memory and 2 MB of PSRAM, enabling efficient handling of memory-intensive applications such as graphical interfaces, buffering, and embedded machine learning workloads.
Designed for flexibility and scalability, the module integrates RF components, power management, and a wide range of peripherals into a surface-mount package suitable for IoT, industrial, and consumer electronics applications.
Key Features
Dual-core Xtensa® LX7 processor operating up to 240 MHz
Integrated 2.4 GHz Wi-Fi (802.11 b/g/n)
Bluetooth 5 Low Energy support
Embedded 8 MB SPI flash memory
Integrated 2 MB PSRAM
AI acceleration through vector instruction support
USB OTG (full-speed) capability
Multiple low-power operating modes
Built-in hardware security features
Extensive peripheral interface support
Functional Overview
The module consists of several integrated subsystems, including a dual-core processing unit, memory subsystem (flash and PSRAM), RF subsystem for wireless communication, peripheral interface controllers, power management circuitry, and a hardware-based security engine.
Electrical Characteristics
Operating voltage range: 3.0 V to 3.6 V (typical 3.3 V)
Operating temperature range: -40°C to +85°C
RF operating frequency: 2.4 GHz
Current consumption varies depending on operating mode, ranging from microamp levels in deep sleep to hundreds of milliamps during active transmission
Processor and Memory
The module features a dual-core Xtensa® LX7 CPU capable of running at frequencies up to 240 MHz. It includes approximately 512 KB of internal SRAM, supplemented by 8 MB of external flash memory and 2 MB of PSRAM for extended data storage and processing.
Wireless Connectivity
The ESP32-S3-WROOM-1-N8R2 supports Wi-Fi communication compliant with 802.11 b/g/n standards in the 2.4 GHz band. It also supports Bluetooth 5 Low Energy for short-range wireless communication. The module includes an integrated PCB antenna and supports RF output power up to approximately +20 dBm.
Peripheral Interfaces
The module provides a wide range of interfaces, including general-purpose input/output (GPIO) pins, SPI, I2C, UART, and I2S for audio applications. It also supports PWM for LED control, a 12-bit analog-to-digital converter (ADC), and USB OTG functionality. Pin functions are multiplexed to maximize flexibility.
Power Management
Power efficiency is achieved through multiple operating modes, including active mode, modem sleep, light sleep, and deep sleep. The module includes an RTC subsystem for low-power timekeeping and supports dynamic frequency scaling to optimize performance and energy consumption.
Security Features
The module incorporates several hardware-based security mechanisms, including secure boot, flash encryption, and digital signature verification. It also includes a hardware random number generator and cryptographic accelerators supporting AES, SHA, RSA, and ECC algorithms.
Mechanical Characteristics
The module is designed for surface-mount integration and measures approximately 18 mm by 25.5 mm. It includes an onboard PCB antenna and is suitable for compact embedded designs.
Pin Configuration Overview
GPIO pins are multiplexed to support various peripheral functions such as analog inputs, communication interfaces, and control signals. Dedicated pins are provided for power supply, module enable, and boot configuration.
Typical Applications
Internet of Things (IoT) devices
Smart home systems
Industrial automation and monitoring
Edge AI and machine learning applications
Wearable electronics
Audio and multimedia systems
USB-enabled embedded devices
Compliance
The module is designed to meet Wi-Fi and Bluetooth standards and is compliant with RoHS requirements. Certification such as FCC or CE may apply depending on the specific module variant and deployment.
Ordering Information
The ESP32-S3-WROOM-1-N8R2 variant includes 8 MB of flash memory and 2 MB of PSRAM.
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