The ESP32-WROOM-32 is a powerful Wi-Fi + Bluetooth module developed by Espressif Systems. It’s built around the ESP32-D0WDQ6 (or ESP32-D0WD) chip, which integrates:
Dual-core Xtensa® 32-bit LX6 microprocessor (up to 240 MHz)
Integrated Wi-Fi 802.11 b/g/n
Bluetooth v4.2 BR/EDR and BLE
Rich peripheral interfaces
Key Features
Processor: Dual-core 32-bit Xtensa® LX6 CPU, up to 600 DMIPS
RAM: 520 KB SRAM (on-chip)
Flash Memory: 4 MB (in standard WROOM-32 module)
Wireless:
Wi-Fi 802.11 b/g/n (2.4 GHz)
Bluetooth v4.2 (Classic + BLE)
I/O Interfaces:
34 programmable GPIOs
UART, SPI, I²C, I²S, CAN, PWM
12-bit SAR ADC (up to 18 channels)
2 × 8-bit DACs
Touch sensors
Power: 3.0V–3.6V operating voltage, deep-sleep current ~5 μA
Operating Temperature: –40 °C to +85 °C
Physical Description
Package: 38-pin SMD module, metal RF shield
Size: 18 mm × 25.5 mm × 3.1 mm
Antenna: Onboard PCB antenna (with U.FL connector in some variants)
Applications
Smart home (lights, sensors, voice assistants)
Wearables & healthcare devices
Industrial automation and robotics
IoT gateways and data loggers
Wireless audio (via I²S + Bluetooth)