Specifications
ESP32-WROOM-32D is a universal Wi-Fi+Bluetooth combo MCU module launched by Espressif Systems, built on ESP32-D0WD dual-core chip with optimized onboard PCB antenna. It integrates complete RF circuits, crystal oscillator and 4MB SPI flash, delivering balanced computing power, wireless performance and low power consumption for mass IoT and embedded smart hardware projects.
👉 It differs from original ESP32-WROOM-32 which uses larger ESP32-D0WDQ6 chip, and ESP32-WROOM-32U equipped with U.FL external antenna connector. This D version adopts upgraded compact silicon die and tuned built-in PCB antenna, ideal for compact end devices without external antenna expansion demandEspressif Systems.
Key Features
- Dual-Core High-Speed Processing Core
- Dual Xtensa LX6 32-bit microprocessors, configurable clock up to 240 MHz
- 448 KB ROM + 520 KB SRAM + 8 KB RTC fast-access SRAM
- Independent hardware FPU for floating-point calculation, supports audio decoding, sensor data fusion and lightweight AI arithmetic
- Rich multi-level power-saving sleep modes for battery-powered equipment
- Integrated 2.4GHz Wi-Fi & Bluetooth 4.2 Dual Wireless
- Wi-Fi: IEEE 802.11 b/g/n, 1T1R single stream, max throughput 150 Mbps, supports A-MPDU/A-MSDU aggregation
- Bluetooth: BR/EDR classic Bluetooth + BLE low energy, compatible with SBC/CVSD audio encoding, AFH anti-interference frequency hopping
- Simultaneous Wi-Fi & Bluetooth coexistence with hardware RF scheduling, stable concurrent data transmission
- ESP32-WROOM-32D equipped with onboard optimized PCB antenna, no external antenna required
- Abundant Peripheral Interfaces
- Up to 32 multiplexed GPIO pins with strapping function for boot configuration
- Standard peripherals: UART, SPI, SDIO, I2C, I2S audio bus, LED/PWM motor driver
- Analog modules: 12-bit multi-channel ADC, 8-bit dual DAC, capacitive touch sensor interface
- Industrial compatible TWAI bus (ISO 11898 CAN 2.0), IR remote transmit/receive, pulse counter
- Memory & Hardware Integration
- Onboard 40 MHz precision crystal oscillator, integrated RF matching circuit
- Standard 4 MB SPI flash, optional 8 MB / 16 MB flash for large firmware storage
- No embedded PSRAM; for high-buffer scenarios select WROVER series modules
- Compact module dimension: 18 × 25.5 × 3.1 mm, surface-mount stamp hole packaging
- Electrical & Environmental Specifications
- Supply voltage range: 3.0 V ~ 3.6 V (nominal 3.3 V)
- Wide industrial operating temperature: -40°C ~ +85°C
- Full RoHS & REACH green compliance, passed global RF regulatory certifications (FCC, CE, SRRC)
- Supports Arduino IDE, ESP-IDF, MicroPython mainstream development frameworks
Typical Applications
Smart home devices: smart switches, lighting control panels, thermostats and wireless sensors
Battery-powered environmental monitoring nodes, temperature/humidity/vibration data loggers
Bluetooth audio equipment: wireless speakers, headsets, voice intercom terminals
Industrial HMI touch screens, serial-to-Wi-Fi RS485/Modbus IoT gateways
Educational single-board computers, electronic experiment training platforms
Portable wearable devices, fitness bracelets and gesture remote controllers
Small network IPC cameras, low-power wireless alarm security systems
Medical portable monitoring equipment, wireless patient data transmission modules
Retail self-service kiosks, mini POS wireless communication units
Low-cost embedded development boards and mass consumer smart hardware
LXB Semicon supplies original Espressif ESP32-WROOM-32D Wi-Fi Bluetooth MCU module
