Overview
The ESP32-WROOM-32E-H4 is a versatile and powerful Wi-Fi + Bluetooth + Bluetooth LE MCU module developed by Espressif Systems. This module is built around the ESP32-D0WD-V3 or ESP32-D0WDR2-V3 SoC, featuring a Xtensa dual-core 32-bit LX6 microprocessor that operates up to 240 MHz. It is designed to cater to a wide range of applications, from low-power sensor networks to more demanding tasks such as voice encoding, music streaming, and MP3 decoding.
Key Specifications
| Category | Specification |
|---|---|
| CPU and On-Chip Memory | ESP32-D0WD-V3 or ESP32-D0WDR2-V3, Xtensa dual-core 32-bit LX6 microprocessor, up to 240 MHz |
| ROM | 448 KB |
| SRAM | 520 KB + 16 KB SRAM in RTC |
| Wi-Fi | 802.11b/g/n, up to 150 Mbps, A-MPDU and A-MSDU aggregation, 0.4 µs guard interval support |
| Bluetooth | Bluetooth V4.2 BR/EDR and Bluetooth LE, Class-1, class-2 and class-3 transmitter, AFH, CVSD and SBC |
| Peripherals | SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI® (CAN Specification 2.0) |
| Integrated Components | 40 MHz crystal oscillator, 4 MB SPI flash |
| Antenna | On-board PCB antenna |
| Operating Voltage/Power Supply | 3.0 ~ 3.6 V |
| Operating Ambient Temperature | –40 ~ 85 °C |
| Certification | Bluetooth: BQB, RF: See certificates, Green: REACH/RoHS |
Key Features
- CPU and On-Chip Memory: Features an ESP32-D0WD-V3 or ESP32-D0WDR2-V3 SoC with a Xtensa dual-core 32-bit LX6 microprocessor, operating up to 240 MHz, along with 448 KB ROM, 520 KB SRAM, and 16 KB SRAM in RTC.
- Wi-Fi and Bluetooth: Supports 802.11b/g/n Wi-Fi with a data rate up to 150 Mbps and Bluetooth V4.2 BR/EDR and Bluetooth LE.
- Peripherals: Includes a rich set of peripherals such as SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, and TWAI® (compatible with ISO 11898-1, i.e., CAN Specification 2.0).
- Integrated Components: Comes with a 40 MHz crystal oscillator and 4 MB SPI flash.
- Antenna Options: Equipped with an on-board PCB antenna.
- Operating Conditions: Operates within a voltage range of 3.0 ~ 3.6 V and an ambient temperature range of –40 ~ 85 °C.
Applications
The ESP32-WROOM-32E-H4 is versatile and can be used in a variety of applications, including:
- Low-power sensor networks
- Voice encoding and music streaming
- MP3 decoding
- Smart home devices
- IoT projects
- Industrial automation
- Wearable devices
- Automotive systems
Q & A
- What is the core processor of the ESP32-WROOM-32E-H4?
The core processor is the ESP32-D0WD-V3 or ESP32-D0WDR2-V3 SoC, featuring a Xtensa dual-core 32-bit LX6 microprocessor.
- What are the Wi-Fi specifications of the ESP32-WROOM-32E-H4?
It supports 802.11b/g/n with a data rate up to 150 Mbps, A-MPDU and A-MSDU aggregation, and 0.4 µs guard interval support.
- What Bluetooth specifications does the module support?
It supports Bluetooth V4.2 BR/EDR and Bluetooth LE, with Class-1, class-2, and class-3 transmitter capabilities.
- What peripherals are available on the module?
The module includes peripherals such as SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, and TWAI® (CAN Specification 2.0).
- What is the operating voltage range of the ESP32-WROOM-32E-H4?
The operating voltage range is 3.0 ~ 3.6 V.
- What is the operating ambient temperature range of the module?
The operating ambient temperature range is –40 ~ 85 °C.
- Does the module come with an antenna?
Yes, it comes with an on-board PCB antenna.
- What certifications does the module have?
The module has Bluetooth certification (BQB), RF certification (see certificates), and green certification (REACH/RoHS).
- What are some common applications of the ESP32-WROOM-32E-H4?
Common applications include low-power sensor networks, voice encoding, music streaming, MP3 decoding, smart home devices, IoT projects, industrial automation, wearable devices, and automotive systems.
- How much SRAM does the module have?
The module has 520 KB SRAM and an additional 16 KB SRAM in RTC.
