Overview
The ESP32-WROOM-32D-N4 is a powerful and versatile Wi-Fi and Bluetooth module developed by Espressif Systems. At its core, it features the ESP32-D0WD chip, which is part of the ESP32 series. This module is designed to be scalable and adaptive, making it suitable for a wide range of applications, from low-power sensor networks to demanding tasks such as voice encoding, music streaming, and MP3 decoding. The module integrates traditional Bluetooth, Bluetooth Low Energy (BLE), and Wi-Fi capabilities, along with a variety of peripherals and interfaces.
Key Specifications
| Category | Specification |
|---|---|
| CPU | Dual-core Xtensa 32-bit LX6 MCU, adjustable clock frequency from 80 MHz to 240 MHz |
| Internal Memory | 448 kB of ROM, 520 kB of on-chip SRAM, 8 kB of RTC FAST Memory, 8 kB of RTC SLOW Memory, 1 kbit of eFuse |
| External Memory | 4 MB of external SPI flash |
| Wi-Fi Protocols | 802.11 b/g/n/e/i (802.11n up to 150 Mbps), A-MPDU and A-MSDU aggregation, 0.4 µs guard interval support |
| Bluetooth Protocols | Bluetooth v4.2 BR/EDR and BLE, NZIF receiver with -97 dBm sensitivity, Class-1, Class-2, and Class-3 transmitter |
| Frequency Range | 2.4 ~ 2.5 GHz (Wi-Fi), Bluetooth frequency range as per standard |
| Operating Voltage | 3.0 V ~ 3.6 V |
| Operating Current | Average: 80 mA, Minimum current delivered by power supply: 500 mA |
| Operating Temperature | -40 °C ~ +85 °C |
| Dimensions | (18.00±0.10) × (25.50±0.10) × (3.10±0.10) mm |
| Antenna | Onboard PCB antenna, external antenna connector available |
| Peripherals | SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, GPIO, capacitive touch sensor, ADC, DAC, Hall sensor |
Key Features
- Dual-Core CPU: The ESP32-D0WD chip features two Xtensa 32-bit LX6 microprocessors with adjustable clock frequencies from 80 MHz to 240 MHz.
- Wi-Fi and Bluetooth Capabilities: Supports 802.11 b/g/n/e/i Wi-Fi protocols and Bluetooth v4.2 BR/EDR and BLE.
- Low Power Consumption: Sleep current is less than 5 μA, making it suitable for battery-powered and wearable electronics applications.
- Rich Peripherals: Includes capacitive touch sensors, Hall sensors, SD card interface, Ethernet interface, high-speed SPI, UART, I2S, and I2C.
- Integrated Memory: 448 kB of ROM, 520 kB of on-chip SRAM, and 4 MB of external SPI flash.
- Certifications: Fully certified with Wi-Fi Alliance, Bluetooth BQB, Green Certification, REACH/RoHS, and reliability tests.
Applications
- IoT Devices: Suitable for a wide range of IoT applications, including smart home devices, industrial automation, and wearable electronics.
- Low-Power Sensor Networks: Ideal for low-power sensor networks due to its low sleep current.
- Audio and Voice Applications: Supports voice encoding, music streaming, and MP3 decoding.
- Industrial Automation: Can be used in industrial settings for control and monitoring systems.
- Wearable Electronics: Suitable for wearable devices due to its low power consumption and compact size.
Q & A
- What is the core processor of the ESP32-WROOM-32D-N4 module?
The core processor is the ESP32-D0WD chip, which features a dual-core Xtensa 32-bit LX6 MCU.
- What are the supported Wi-Fi protocols?
The module supports 802.11 b/g/n/e/i Wi-Fi protocols, including 802.11n up to 150 Mbps.
- What Bluetooth protocols are supported?
The module supports Bluetooth v4.2 BR/EDR and Bluetooth Low Energy (BLE).
- What is the operating voltage range of the module?
The operating voltage range is 3.0 V ~ 3.6 V.
- What are the dimensions of the module?
The dimensions are (18.00±0.10) × (25.50±0.10) × (3.10±0.10) mm.
- What kind of antenna does the module have?
The module has an onboard PCB antenna and an external antenna connector.
- What peripherals are integrated into the module?
The module includes SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, GPIO, capacitive touch sensor, ADC, DAC, and Hall sensor.
- Is the module certified for various standards?
Yes, the module is fully certified with Wi-Fi Alliance, Bluetooth BQB, Green Certification, REACH/RoHS, and reliability tests.
- What are some typical applications of the ESP32-WROOM-32D-N4 module?
Typical applications include IoT devices, low-power sensor networks, audio and voice applications, industrial automation, and wearable electronics.
- How much current does the module consume in sleep mode?
The sleep current is less than 5 μA.
