Espressif ESP32-WROVER-IPEX 4M 32Mbit Flash WiFi Bluetooth Module

Specifications:

• Kind of connector: IPEX Antenna
• Wifi: 802.11 b/g/n (802.11n up to 150 Mbps)
• Frequency range: 2412 ~ 2484 MHz
• Bluetooth: v4.2 BR/EDR and BLE
• Radio: NZIF receiver with –97 dBm sensitivity, Class-1, class-2, and class-3 transmitter, AFH
• Audio: CVSD and SBC
• On-chip sensor: Hall sensor
• Integrated crystal: 40 MHz crystal
• Integrated SPI flash: 4 MB
• Integrated PSRAM: 32 MB
• Operating voltage/Power supply: 3.0 V ~ 3.6 V
• Minimum current: 500 mA
• Operating temperature range: –40 °C ~ 85 °C
• Dimensions: 18 x 31.5 x 3.3 mm
• Moisture sensitivity level (MSL): Level 3

 Applications

• Industrial IoT Gateways: Mount the module inside a DIN-rail metal enclosure and route an external antenna outside for reliable factory-floor telemetry.
• Smart Audio Streaming: Utilize the 8MB PSRAM to buffer internet radio or build custom voice-assistant hardware (like rhasspy).
• Smart Agriculture: Build long-range soil moisture monitoring nodes where high-gain antennas are necessary to punch through crop foliage.
• AI & Machine Learning: Run TensorFlow Lite for Microcontrollers (TinyML) natively, leveraging the extra RAM for larger data models.

Unlock New Capabilities

• Past Projects: If you've mastered the basic ESP32 WROOM module and are hitting "Out of Memory" errors on MicroPython, or losing signal through walls...
• Feature Upgrade: This ESP32-WROVER-IPEX unlocks high-speed data logging, advanced audio manipulation, and serious wireless range.
• Effort Level: Intermediate to Advanced. Because this is a bare module (castellated edges), you will need to solder it to a custom PCB or a breakout board. It does not have a built-in USB port.

Virtual Technician & Wiring Guide

• ⚠️ CRITICAL WARNING: This is a strictly 3.3V device. Applying 5V directly to the VCC or logic pins will instantly destroy the module. We enforce a Probots Logic-Safe standard: Always use a reliable 3.3V LDO regulator (like an AMS1117-3.3) capable of supplying at least 500mA, as Wi-Fi spikes can cause brownouts on weaker power supplies.
• Boot Mode Wiring: To flash code via UART, you must pull GPIO0 LOW and EN (Enable) LOW momentarily to enter bootloader mode.
• Antenna Rule: Never power on the Wi-Fi/Bluetooth radio without an IPEX antenna connected. Doing so can reflect RF energy back into the amplifier and permanently damage the radio.

Package Includes:

• 1 x Espressif ESP32-WROVER-IPEX 4M 32Mbit Flash WiFi Bluetooth Module

Frequently Asked Questions (FAQ)

• What is the difference between ESP32 WROOM and WROVER?
  The WROVER modules include additional PSRAM (Pseudo Static RAM) in this case, 8MB. This is essential for memory-intensive tasks like audio streaming, driving large displays, or running MicroPython efficiently, whereas WROOM only has the internal 520 KB SRAM.
• Does this module have a built-in antenna?
  No, the "IPEX" designation means it requires an external 2.4GHz antenna connected to the U.FL/IPEX socket to transmit or receive any wireless signals.
• Can I power this directly from an Arduino 5V pin?
  No. This module requires a stable 3.3V power supply capable of delivering at least 500mA during Wi-Fi transmission spikes.
• How do I program this bare module?
  You need an external USB-to-TTL Serial adapter (like an FTDI, CP2102, or CH340) connected to the TX0 and RX0 pins, and you must manually manage the EN and GPIO0 pins to enter programming mode.
• Can I use this on a standard breadboard?
  Not directly. The module has castellated holes with a 1.27mm pitch. You will need an ESP32 adapter/breakout board to adapt it to a 2.54mm breadboard pitch.
• Why am I getting "Brownout detector was triggered" errors?
  This indicates your 3.3V power supply is failing to provide enough current (usually during a Wi-Fi transmission spike). Ensure your regulator can handle a 500mA peak.
• How do I enable the 8MB PSRAM in the Arduino IDE?
  Go to Tools > Board, select "ESP32 Wrover Module", and ensure the "PSRAM" option is set to "Enabled".
• Can I use all the GPIO pins?
  Most of them, but GPIO 16 and GPIO 17 are internally wired to the PSRAM on the WROVER module. Do not use these pins for external components.
• Is this module compatible with MicroPython?
  Yes! MicroPython runs exceptionally well on WROVER modules because the 8MB of PSRAM allows for much larger scripts and dynamic memory allocation.
• What type of antenna connector is on the board?
  It uses a standard IPEX connector (also known as U.FL or IPX).
• Can I use a 5V logic level sensor with this module?
  No, the GPIO pins are not 5V tolerant. You must use a logic level converter when interfacing with 5V sensors.
• What is the maximum Wi-Fi range with an external antenna?
  Depending on the dBi rating of your external antenna and environmental obstructions, you can achieve hundreds of meters, significantly outperforming PCB antennas.
• What is the standby power consumption?
  In Deep Sleep mode, the ESP32 chip itself can consume as little as 10µA to 150µA, depending on which peripherals (like the ULP co-processor) are kept active.
• Does this module have a USB-to-UART chip onboard?
  No, this is a bare system-on-module (SoM). It does not contain USB circuitry.
• Can I desolder the IPEX connector and add a wire antenna?
  It is highly discouraged. Modifying the RF pathway will ruin the impedance matching and severely degrade signal quality. Use a proper IPEX pigtail cable.
• Which IDEs can I use with this module?
  You can use the Arduino IDE, PlatformIO, Espressif ESP-IDF (C/C++), Thonny (for MicroPython), and more.
• How much Flash memory does this module have?
  This specific variant has 4MB of SPI Flash memory for storing your program code and file systems (SPIFFS/LittleFS).