ESP32 WROOM-32 WiFi BLE Bluetooth MCU Module | Compoden
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ESP32 WROOM-32 WiFi BLE Bluetooth MCU Module with 4MB Flash
The ESP32 WROOM-32 is a low-power microcontroller module with integrated WiFi and Bluetooth/BLE connectivity. It's ideal for IoT devices, smart home automation, and portable battery-powered projects. Its dual-core processor and rich peripheral set make it a versatile choice for both beginners and advanced developers.
Key Specifications
| Specification | Value |
|---|---|
| Microcontroller | ESP32-D0WDQ6 (dual-core Xtensa LX6) |
| Clock Speed | 240 MHz |
| Flash Memory | 4 MB (Quad SPI) |
| SRAM | 520 KB |
| WiFi | 802.11 b/g/n (2.4 GHz) |
| Bluetooth | v4.2 BR/EDR and BLE |
| GPIO Pins | 34 (some shared with other functions) |
| Operating Voltage | 2.3V to 3.6V (typically 3.3V) |
What You Can Build With This
- Wi-Fi weather station that uploads data to the cloud
- Bluetooth-controlled robot or car
- Home automation hub to control lights, switches, and sensors
- Battery-powered IoT sensor node for temperature, humidity, or motion
Compatibility
This module works with the Arduino IDE via the ESP32 board package, as well as ESP-IDF and MicroPython. It's compatible with common prototyping boards and can be integrated into custom PCBs. Pair it with an external 3.3V regulator and USB-to-serial adapter for development.
Wiring Notes
Provide a stable 3.3V supply capable of at least 500mA. The EN pin must be pulled high for normal operation. For initial programming, connect GPIO0 to ground while resetting to enter download mode. Keep antenna area clear of metal for best wireless performance.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
The ESP32 WROOM-32 cannot plug directly into an Arduino Uno shield, but it can be programmed using the Arduino IDE with the ESP32 board package installed.
What is the typical Wi-Fi range?
In open air with the onboard ceramic antenna, expect around 100 meters line‑of‑sight. Walls and interference will reduce this.
Does it come with headers soldered?
No, this is a bare module. You will need to solder it to a breakout board or your own PCB.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 3-7 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items
The official datasheet / documentation for this part:
View DatasheetPinout
| Pin | Function |
|---|---|
| GPIO0 | digital, output, adc2, touch, strapping, boot |
| GPIO1 | digital, output, uart0 tx |
| GPIO2 | digital, output, adc2, touch, strapping |
| GPIO3 | digital, uart0 rx |
| GPIO4 | digital, output, adc2, touch, pwm |
| GPIO5 | digital, output, pwm, strapping, spi cs vspi |
| GPIO12 | digital, output, adc2, touch, strapping |
| GPIO13 | digital, output, adc2, touch, pwm |
| GPIO14 | digital, output, adc2, touch, pwm |
| GPIO15 | digital, output, adc2, touch, strapping |
| GPIO18 | digital, output, pwm, spi sck vspi |
| GPIO19 | digital, output, pwm, spi miso vspi |
| GPIO21 | digital, output, pwm, i2c sda |
| GPIO22 | digital, output, pwm, i2c scl |
| GPIO23 | digital, output, pwm, spi mosi vspi |
| GPIO25 | digital, output, adc2, dac1, pwm |
| GPIO26 | digital, output, adc2, dac2, pwm |
| GPIO27 | digital, output, adc2, touch, pwm |
| GPIO32 | digital, output, adc1, touch, pwm |
| GPIO33 | digital, output, adc1, touch, pwm |
| GPIO34 | digital, input only, adc1 |
| GPIO35 | digital, input only, adc1 |
| GPIO36 | digital, input only, adc1, sensor vp |
| GPIO39 | digital, input only, adc1, sensor vn |
| GPIO6 | reserved spi flash, do not use |
| GPIO7 | reserved spi flash, do not use |
| GPIO8 | reserved spi flash, do not use |
| GPIO9 | reserved spi flash, do not use |
| GPIO10 | reserved spi flash, do not use |
| GPIO11 | reserved spi flash, do not use |
| GPIO16 | digital, output, pwm |
| GPIO17 | digital, output, pwm |
I2C: SDA GPIO21, SCL GPIO22
Boot pins — avoid for buttons/pull-ups: GPIO0, GPIO2, GPIO5, GPIO12, GPIO15
Input only: GPIO34, GPIO35, GPIO36, GPIO39
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