Overview
The ESP32-WROOM-32D-N8 module, produced by Espressif Systems, is a highly integrated Wi-Fi, Bluetooth, and Bluetooth Low Energy (BLE) module. It is based on the ESP32-D0WD chip, which features a dual-core Xtensa® 32-bit LX6 MCU. This module is designed to be scalable and adaptive, making it suitable for a wide range of applications, including Internet of Things (IoT) solutions, wearable electronics, home automation, and more. The module integrates various peripherals such as capacitive touch sensors, Hall sensors, SD card interface, Ethernet interface, and high-speed SPI/SPI/SPIO, among others. It also supports Wi-Fi and Bluetooth protocols, enabling robust wireless connectivity.
Key Specifications
| Category | Specification |
|---|---|
| Core | ESP32-D0WD |
| CPU Cores | Dual-core Xtensa® 32-bit LX6 MCU |
| Clock Frequency | 80 MHz to 240 MHz |
| Memory | 448 kB ROM, 520 kB SRAM, 8 kB RTC FAST Memory, 8 kB RTC SLOW Memory, 1 kbit eFuse |
| Flash Memory | 4 MB, 8 MB, or 16 MB |
| 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 specification |
| Frequency Range | 2.4 ~ 2.5 GHz |
| Antenna | Onboard PCB antenna |
| Dimensions | 18 mm x 25.5 mm x 3.1 mm |
| Operating Voltage | 2.7 V ~ 3.6 V |
| Operating Current | Average: 80 mA, Minimum current delivered by power supply: 500 mA |
| Operating Temperature Range | –40 °C ~ +85 °C (–40 °C ~ +105 °C for high temperature option) |
| Moisture Sensitivity Level (MSL) | Level 3 |
Key Features
- Combo Wi-Fi, Bluetooth (BT), and Bluetooth Low Energy (BLE) module
- Two independently controlled CPU cores with adjustable clock frequency from 80 MHz to 240 MHz
- Sleep current less than 5 μA, suitable for battery-powered and wearable-electronics applications
- Integrated peripherals: SD card, UART, SPI, SDIO, I²C, LED PWM, Motor PWM, I²S, IR, GPIO, capacitive touch sensor, ADC, DAC, Hall sensors
- Supports Wi-Fi modes: Soft-AP/Station/SoftAP+Station/P2P
- Bluetooth Low Energy (BLE) connects to smartphones, broadcasting low-energy beacons for easy detection
- Fully certified with integrated PCB antenna and software stacks
- FreeRTOS operating system with LwIP; TLS 1.2 and built-in hardware acceleration
- Secure encrypted over-the-air (OTA) updates
Applications
- Universal low-power IoT sensor hub
- Universal low-power IoT data logger
- Camera video streaming
- OTT TV box/set-top box equipment
- USB device
- Speech Recognition
- Home automation
- Smart home control panel
- Wi-Fi toys
- Wearable electronics
- Music streaming and MP3 decoding
- Sensor networks
- Voice encoding
Q & A
- What is the core chip of the ESP32-WROOM-32D module?
The core chip is the ESP32-D0WD, which belongs to the ESP32 series and features a dual-core Xtensa® 32-bit LX6 MCU.
- What are the supported Wi-Fi protocols?
The module supports Wi-Fi protocols 802.11 b/g/n/e/i (802.11n up to 150 Mbps), A-MPDU and A-MSDU aggregation, and 0.4 µs guard interval support.
- What Bluetooth protocols does the module support?
The module supports Bluetooth v4.2 BR/EDR and BLE specification.
- What is the operating voltage range of the module?
The operating voltage range is 2.7 V ~ 3.6 V.
- What are the dimensions of the ESP32-WROOM-32D module?
The dimensions are 18 mm x 25.5 mm x 3.1 mm.
- What is the average operating current of the module?
The average operating current is 80 mA.
- What are some common applications of the ESP32-WROOM-32D module?
Common applications include IoT solutions, wearable electronics, home automation, music streaming, and sensor networks.
- Does the module support over-the-air (OTA) updates?
Yes, the module supports secure encrypted OTA updates.
- What operating system does the module use?
The module uses the FreeRTOS operating system with LwIP and TLS 1.2 support.
- What is the moisture sensitivity level (MSL) of the module?
The moisture sensitivity level is Level 3.
- What are the supported interfaces on the module?
The module supports interfaces such as SD card, UART, SPI, SDIO, I²C, LED PWM, Motor PWM, I²S, IR, GPIO, capacitive touch sensor, ADC, and DAC.
