ESP32 Development Board WiFi Bluetooth CP2102 30-Pin ESP32-WROOM Compatible - Image 1
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ESP32 Development Board WiFi Bluetooth CP2102 30-Pin ESP32-WROOM Compatible

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Description

⚡ ESP32 Development Board WiFi + Bluetooth Dual-Core CP2102 30-Pin – ESP32-WROOM Compatible DevKit | AuscomTech

This ESP32 Development Board combines dual-core processing, integrated WiFi + Bluetooth/BLE, and ultra-low-power operation in a compact 30-pin DevKit layout.
Using the reliable CP2102 USB-to-serial chip and a pinout compatible with the popular ESP32-WROOM DevKit boards, it drops straight into most ESP32 tutorials, examples, and wiring guides.

Ideal for Arduino, MicroPython, ESPHome, Tasmota, ESP-IDF, IoT devices, Home Assistant nodes, robotics, and wireless sensors.

⚠️ Note: This is a compatible ESP32 DevKit. The PCB is marked “ESP32” and does not carry the official Espressif ESP32-WROOM metal module, but it is firmware and pinout compatible with ESP32-WROOM DevKit-style boards.

🔥 Key Features

🧠 Dual-Core ESP32 Microcontroller

  • ESP32 dual-core 32-bit LX6 CPU

  • Up to 240 MHz clock speed

  • Integrated WiFi 2.4 GHz (802.11 b/g/n)

  • Bluetooth Classic + BLE

  • Hardware support for PWM, ADC, DAC, I²C, SPI, UART, timers, etc.

📡 WiFi + Bluetooth + BLE in One Board

Perfect for:

  • Smart home & Home Assistant

  • Wireless sensors & logging

  • BLE beacons, remote control, and mesh-style networks

🔌 CP2102 USB Interface (Not CH340)

  • Stable USB-UART bridge

  • Widely supported on Windows, macOS, Linux

  • Micro-USB port for both power and programming

📌 30-Pin ESP32 DevKit Layout – ESP32-WROOM Compatible Pinout

  • Matches common ESP32 DevKit / WROOM layouts

  • Breadboard-friendly spacing

  • Breaks out GPIOs for:

    • ADC

    • PWM

    • SPI

    • I²C

    • UART

    • Touch inputs

    • DAC outputs

🌙 Ultra-Low Power

  • Supports deep-sleep modes

  • Ideal for battery-powered IoT nodes and remote monitoring

🧰 Compatible Development Platforms

Fully supported by:

  • Arduino IDE

  • ESPHome (Home Assistant)

  • Tasmota

  • MicroPython

  • ESP-IDF (official SDK)

  • PlatformIO

📐 Specifications

Feature Details
MCU ESP32 dual-core LX6
Clock Speed Up to 240 MHz
Flash 4 MB (typical, may vary by batch)
SRAM 520 KB
USB Interface CP2102 USB-UART
Wireless WiFi 802.11 b/g/n + Bluetooth + BLE
Logic Voltage 3.3 V
Power Input 5 V via Micro-USB or 5V pin
GPIO Layout 30-pin ESP32 DevKit (WROOM compatible)
Programming Via USB (CP2102)
Sleep Modes Deep sleep / light sleep
Connector Micro-USB

🧩 Popular Applications

  • ESPHome / Home Assistant automation nodes

  • Smart switches, relays, and lighting controllers

  • WiFi/BLE environmental sensors

  • Robotics and motor control

  • IoT gateways and MQTT clients

  • Wireless data loggers

  • BLE beacons and proximity projects

  • STEM / maker education and prototyping

📦 Package Includes

  • 1 × ESP32 Development Board (CP2102, 30-Pin, ESP32-WROOM Compatible DevKit)

📌 Code Examples & Usage – ESP-WROOM-32 WiFi & Bluetooth Development Board

📋 Overview

The ESP-WROOM-32 development board is a powerful 32-bit dual-core microcontroller with built-in Wi-Fi and Bluetooth, making it ideal for modern IoT, automation, and wireless projects.

Common applications include:

  • Wi-Fi & Bluetooth IoT devices

  • Web servers & dashboards

  • Sensor monitoring & data logging

  • Smart home projects

  • Wireless controllers & gateways

This board is fully compatible with the Arduino IDE, ESP-IDF, and MicroPython.

⚙ Key Features

  • MCU: ESP32 (dual-core Tensilica Xtensa LX6)

  • Wi-Fi: 802.11 b/g/n (2.4GHz)

  • Bluetooth: Classic + BLE

  • Logic level: 3.3V

  • Operating voltage: 5V via USB / VIN

  • GPIO: Up to 34 pins

  • Interfaces: UART, SPI, I²C, I²S, ADC, DAC, PWM

  • USB interface: Micro-USB

⚠ IMPORTANT – Voltage & GPIO Notes

🚨 ESP32 GPIOs are NOT 5V tolerant

  • GPIO max input: 3.3V

  • Use level shifting when connecting 5V sensors or modules

  • Power the board via:

    • Micro-USB

    • VIN (5V)

✔ Many 3.3V sensors connect directly
✔ ADC inputs are 0–3.3V max

🔌 Typical Power Options

Power Method Notes
Micro-USB Most common
VIN (5V) External regulated supply
3V3 pin Output only (do not back-feed)

📌 Always use a stable power supply, especially when Wi-Fi is active.

🛠 Arduino IDE Setup (Required)

1️⃣ Add ESP32 Board Support

Arduino IDE → File → Preferences

Add this to Additional Boards Manager URLs:

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

Then:

  1. Open Tools → Board → Boards Manager

  2. Search for ESP32

  3. Install esp32 by Espressif Systems

2️⃣ Board Settings (Typical)

  • Board: ESP32 Dev Module

  • Upload Speed: 921600 or 460800

  • Flash Frequency: 40MHz

  • Flash Mode: QIO

  • Partition Scheme: Default

📌 If upload fails, try 115200 baud.

🧪 1️⃣ First Test – Blink LED

const int ledPin = 2; // Common onboard LED pin (may vary)

void setup() {
pinMode(ledPin, OUTPUT);
}

void loop() {
digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);
delay(500);
}

✔ Confirms board, USB driver, and upload process are working

🌐 2️⃣ Wi-Fi Scan Example

#include <WiFi.h>

void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);

Serial.println("Scanning for WiFi networks...");
int n = WiFi.scanNetworks();

for (int i = 0; i < n; i++) {
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));
Serial.println(" dBm)");
}
}

void loop() {}

🌐 3️⃣ Simple Wi-Fi Web Server (LED Control)

#include <WiFi.h>

const char* ssid = "YOUR_WIFI";
const char* password = "YOUR_PASSWORD";

WiFiServer server(80);
const int ledPin = 2;

void setup() {
pinMode(ledPin, OUTPUT);
Serial.begin(115200);

WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
}

server.begin();
}

void loop() {
WiFiClient client = server.available();
if (!client) return;

String request = client.readStringUntil('\r');

if (request.indexOf("/on") != -1) digitalWrite(ledPin, HIGH);
if (request.indexOf("/off") != -1) digitalWrite(ledPin, LOW);

client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/plain");
client.println();
client.println("ESP32 OK");
client.stop();
}

Access in browser:

  • /on

  • /off

📡 4️⃣ Bluetooth Serial Example (Classic BT)

#include "BluetoothSerial.h"

BluetoothSerial SerialBT;

void setup() {
Serial.begin(115200);
SerialBT.begin("ESP32_AuscomTech");
Serial.println("Bluetooth ready");
}

void loop() {
if (SerialBT.available()) {
Serial.write(SerialBT.read());
}
if (Serial.available()) {
SerialBT.write(Serial.read());
}
}

✔ Works with Android
✔ For iOS, use BLE

📊 ADC & PWM Notes

  • ADC resolution: 12-bit (0–4095)

  • PWM via LEDC (hardware PWM)

  • Multiple PWM channels available

Example PWM setup:

ledcSetup(0, 5000, 8);
ledcAttachPin(25, 0);
ledcWrite(0, 128);

🧠 Common Issues & Fixes

Issue Cause Fix
Upload fails Wrong baud rate Lower to 115200
Board resets on Wi-Fi Weak power Better PSU
GPIO not working Wrong pin Check ESP32 pin map
ADC noisy Floating input Add resistor/filter

Additional information

Weight 30 g
Dimensions 260 × 160 × 20 mm

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