ESP32-WROVER-E WiFi & BLE IoT Wireless Module Chip 4M 32Mbit Flash

Specifications:

• Wi-Fi Protocols 802.11 b/g/n (802.11n up to 150 Mbps) A-MPDU and A-MSDU aggregation and 0.4 µs guard interval support
• Frequency range 2412 ~ 2484 MHz
• Bluetooth Protocols Bluetooth v4.2 BR/EDR and Bluetooth LE specification Radio
• NZIF receiver with –97 dBm sensitivity
• Class-1, class-2 and class-3 transmitter
• AFH Audio CVSD and SBC Hardware Module interface SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, Two-Wire Automotive Interface (TWAI®), compatible with ISO11898-1 (CAN Specification 2.0)
• On-chip sensor Hall sensor
• Integrated crystal 40 MHz crystal
• Integrated SPI flash 4 MB
• Integrated PSRAM 8 MB
• Operating voltage/Power supply 3.0 V ~ 3.6 V
• Minimum current delivered by power supply 500 mA Recommended operating temperature range –40 °C ~ 85 °C
• Package size (18.00±0.15) mm × (31.40±0.15) mm × (3.30±0.15) mm
• Moisture sensitivity level (MSL) Level 3

Applications

• Voice Encoding & Streaming: Ideal for smart speakers or VoIP applications.
  IoT Gateways: Managing massive data packets with the help of 8MB PSRAM.
• Industrial Automation: Utilizing the Two-Wire Automotive Interface (TWAI®/CAN 2.0).
• Wearable Electronics: Low-power sleep modes for battery-sensitive devices.

Project Evolution

• Past Projects (Prerequisites): If you have already built basic web servers using the ESP32-WROOM series or Arduino, you are ready for the next level.
• Feature Upgrade: The ESP32-WROVER-E unlocks massive memory capabilities. While standard ESP32 modules struggle with large buffers, the 8MB PSRAM on this module allows for real-time MP3 decoding, high-resolution camera frames, and complex machine learning inference at the edge.
• Effort/Requirements: Advanced. Requires SMD soldering skills (or a breakout board) and familiarity with ESP-IDF or Arduino IDE memory management to utilize the PSRAM.

Virtual Technician & Wiring

• ⚠️ Safety Warning: This module operates strictly on 3.3V. Connecting 5V directly to the VCC or GPIO pins without level shifters will permanently damage the chip.

      Pin Mapping (Common Pins):

• 3V3: Power Supply (Min 500mA)
• GND: Common Ground
• EN: High (3.3V) for chip enable; Low for Reset
• GPIO0: Boot Mode (Pull low to enter flash mode)
• TXD0/RXD0: Serial Programming interface

Package Includes:

• 1 x ESP32-WROVER-E WiFi & BLE IoT Wireless Module Chip 4M 32Mbit Flash

Frequently Asked Questions (FAQ)

• What is the difference between ESP32-WROVER-E and ESP32-WROOM-32E?
  The WROVER-E includes an additional 8MB of PSRAM, which the WROOM-32E lacks, making the WROVER better for memory-intensive tasks.
• Does this module come with a built-in antenna?
  Yes, the "E" version features an integrated PCB antenna.
• How do I enable the 8MB PSRAM in Arduino IDE?
  You must select "ESP32 Dev Module" and ensure the "PSRAM: Enabled" option is selected in the Tools menu.
• Is this module compatible with the ESP-IDF framework?
  Yes, it is fully supported by Espressif's official IoT Development Framework.
• What is the maximum operating temperature?
  The industrial-grade range is –40 °C to 85 °C.
• Can I use this for audio decoding?
  Yes, the 8MB PSRAM provides sufficient buffering for MP3 and AAC decoding.
• What is the input voltage for the ESP32-WROVER-E?
  It requires a stable 3.0V to 3.6V DC supply.
• Does it support Bluetooth 5.0?
  No, it supports Bluetooth v4.2 (Classic and LE).
• How many cores does the ESP32-D0WD-V3 have?
  It is a dual-core processor.
• Can I program this using a standard USB-to-TTL converter?
  Yes, as long as the converter is set to 3.3V logic.
• What is the flash memory size?
  It has 4 MB of integrated SPI flash.
• What does "Logic-Safe" mean for this module?
  It means we provide the necessary documentation to ensure you don't fry the 3.3V pins with 5V signals.
• Is the PCB antenna efficient for long-range?
  It is optimized for standard indoor/outdoor use; for extreme range, consider the WROVER-IE with an IPEX connector.
• What is the current draw in deep sleep?
  The chip consumes less than 5 µA in deep sleep mode.
• Does it support OTA (Over-the-Air) updates?
  Yes, secure encrypted OTA is supported.
• Is it pin-compatible with older WROVER-B modules?
  Yes, the "E" series is the designated replacement for the "B" series.
• Can I run MicroPython on this module?
  Yes, the large PSRAM makes it excellent for MicroPython or CircuitPython.
• Does it have a built-in Hall sensor?
  Yes, the ESP32 chip includes an internal Hall effect sensor.
• What is the SPI speed for the PSRAM?
  The PSRAM operates on a high-speed SPI bus, typically at 40MHz or 80MHz.
• Is this suitable for battery-powered IoT devices?
  Absolutely, due to its advanced power management and low sleep current.