Espressif ESP32-WROVER-IB 8M 64Mbit Flash WiFi Bluetooth Module

Specifications

• Clock Speed: Adjustable from 80 MHz to 240 MHz
• Wireless Connectivity: 802.11 b/g/n Wi-Fi (up to 150 Mbps) and Bluetooth v4.2 BR/EDR & BLE
• External Flash: 8MB SPI Flash
• External PSRAM: 8MB (64Mbit) Pseudo static RAM (PSRAM)
• Antenna Interface: U.FL / IPEX connector for external antennas
• Operating Voltage: 3.0V ~ 3.6V (Strictly 3.3V Logic)
• Minimum Power Supply: 500mA (Recommended 1A+ for peak RF transmission)
• Operating Temperature: –40 °C ~ 85 °C
• Dimensions: 18 mm x 31.4 mm x 3.3 mm
• Integrated Peripherals: Capacitive touch, Hall sensors, SD card interface, Ethernet MAC, high-speed SPI, UART, I2S, and I2C
• Moisture sensitivity level (MSL): Level 3

Applications

• Advanced Audio Processing: Perfect for internet radio, voice encoding, MP3 decoding, and music streaming thanks to the I2S interface and 8MB PSRAM buffer.
• Edge Machine Learning: Run TensorFlow Lite for Microcontrollers to perform voice recognition or basic computer vision.
• Heavyweight Data Logging: Buffer massive amounts of sensor data before writing to an SD card or uploading via Wi-Fi.
• Smart Home Hubs: Act as a central MQTT broker or local mesh network controller.

Unlock New Capabilities

• Past Projects: If you've mastered blinking LEDs and basic Wi-Fi web servers on a standard ESP32-WROOM...
• Feature Upgrade: The ESP32-WROVER-IB unlocks the ability to stream uninterrupted audio, handle complex graphical displays (GUI), and run resource-heavy MicroPython libraries that would instantly crash standard boards due to Out-Of-Memory errors. The IPEX connector also allows you to route an antenna outside of a metal enclosure for massive range upgrades!
• Effort/Requirements: Intermediate to Advanced. This is a bare surface-mount module. You will require a breakout board, a 3.3V voltage regulator, an external IPEX antenna, and a USB-to-TTL converter to program it.

Virtual Technician & Wiring Guide

• ⚠️ CRITICAL WARNING: The ESP32-WROVER-IB is strictly a 3.3V device. Applying 5V to the VCC or any GPIO pin will permanently destroy the chip.

Basic Boot & Flashing Wiring (using a CP2102/CH340 USB-TTL):

• 3V3: Connect to a dedicated 3.3V Regulator (Must supply >500mA)
• GND: Connect to Common Ground
• EN (Enable): Pull HIGH to 3.3V via a 10k resistor (Add a push button to GND to manually reset).
• IO0 (Boot Mode): Must be pulled LOW (to GND) during power-up to enter flashing mode.
• TXD0 (GPIO1): Connect to RX on your USB-TTL adapter
• RXD0 (GPIO3): Connect to TX on your USB-TTL adapter
• Note: Pins GPIO 6, 7, 8, 9, 10, 11, 16, and 17 are used internally for the integrated Flash and PSRAM. Do not use these pins in your external circuitry.

Package Includes:

• 1 x Espressif ESP32-WROVER-IB 8M 64Mbit Flash WiFi Bluetooth Module

Frequently Asked Questions (FAQ)

• What is the difference between ESP32-WROVER-B and ESP32-WROVER-IB?
  The "B" version has an onboard PCB trace antenna, while the "IB" version features an IPEX (U.FL) connector for attaching an external antenna.
• How much memory does this specific module have?
  This module is equipped with 8MB of SPI Flash and 8MB (64Mbit) of PSRAM.
• Can I use this module without an external antenna?
  No. The ESP32-WROVER-IB requires an external 2.4GHz antenna connected to the IPEX port for Wi-Fi and Bluetooth to function properly.
• Is the ESP32-WROVER-IB 5V tolerant?
  No. The power supply and all GPIO pins operate strictly at 3.3V. Using 5V logic will damage the chip.
• How do I put the module into flash/upload mode?
  You must pull GPIO0 LOW (to GND) while resetting the board (pulling the EN pin LOW then HIGH).
• Which GPIO pins are restricted because of the internal memory?
  GPIO 6 through 11, as well as GPIO 16 and 17, are connected to the integrated SPI flash and PSRAM. Do not use these for external components.
• Which pins are "Input Only" on the ESP32?
  GPIOs 34, 35, 36 (VP), and 39 (VN) can only be used as inputs and do not have internal pull-up/pull-down resistors.
• Why am I getting a "Brownout detector was triggered" error?
  This usually occurs when your power supply cannot provide the sudden spike in current (often >500mA) required when the Wi-Fi radio turns on. Ensure your 3.3V regulator is adequately rated.
• Can I run MicroPython on this module?
  Yes! The 8MB of PSRAM makes this module exceptionally well-suited for MicroPython and CircuitPython, allowing for much larger scripts than standard ESP32s.
• Does this module have a built-in USB port?
  No. This is a bare surface-mount module. You need an external USB-to-UART converter (like an FTDI, CP2102, or CH340) to program it.
• How do I enable the PSRAM in the Arduino IDE?
  Go to Tools > Board > ESP32 Dev Module (or similar WROVER board). Then, look for the "PSRAM" option in the Tools menu and set it to "Enabled".
• Can I use ADC2 while using Wi-Fi?
  No. The ADC2 channels are shared with the Wi-Fi driver. If Wi-Fi is active, you must use ADC1 channels to read analog sensors.
• What is the pitch of the pads on the bottom of the module?
  The castellated edge pads have a standard 1.27mm pitch.
• Does this support 5GHz Wi-Fi?
  No, the ESP32 family only supports 2.4GHz Wi-Fi (802.11 b/g/n).
• Can I use standard breadboards with this module?
  Not directly. You will need to solder this module onto an ESP32 breakout board adapter before it can be plugged into a standard 2.54mm pitch breadboard.
• What is the maximum clock frequency?
  The dual-core Tensilica processor can run at up to 240 MHz.
• What type of Bluetooth does it support?
  It supports Bluetooth v4.2 BR/EDR and Bluetooth Low Energy (BLE).
• Is this compatible with FreeRTOS?
  Yes, the ESP-IDF (Espressif IoT Development Framework) is built natively around FreeRTOS, allowing for advanced multitasking.
• What size IPEX connector does it use?
  It uses a standard IPEX Generation 1 (U.FL compatible) connector.
• Can I use the ESP32-WROVER for image processing?
  Yes! The 8MB PSRAM provides the necessary memory buffer to capture, process, and stream images using compatible camera modules.