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esp-wroom-32-esp32-development-board

6 min read

Important Note

This entire repo was AI created - including all of the data within. The intent was to A) help me with my personal electronics inventory; and B) see how I could use AI to make that process a bit easier. DO NOT TRUST!

ESP-WROOM-32 ESP32 ESP-32S Development Board

Details

  • Location: Cabinet-1, Bin 31
  • Category: Development Boards
  • Type: ESP32 Development Board
  • Microcontroller: ESP32 (Dual Xtensa LX6 @ 240MHz)
  • Brand: AITRIP
  • Part Number: B07WCG1PLV
  • Quantity: 2
  • Product URL: https://a.co/d/ciKueeW

Description

The ESP-WROOM-32 ESP32 ESP-32S Development Board is a 2.4GHz dual-mode WiFi + Bluetooth development board featuring dual cores microcontroller processor integrated with antenna RF AMP filter. It supports AP, STA, and AP+STA modes with ultra-low power consumption and is compatible with Arduino IDE.

Specifications

  • Microcontroller: ESP32 dual-core Xtensa LX6 @ up to 240MHz
  • Memory: 520KB SRAM, 4MB Flash
  • WiFi: 802.11 b/g/n with integrated antenna
  • Bluetooth: Bluetooth Classic and BLE (Bluetooth Low Energy)
  • GPIO Pins: 30 total programmable pins
  • ADC: 12x 12-bit analog inputs
  • DAC: 2x 8-bit digital-to-analog converters
  • Touch: Capacitive touch GPIO pins
  • Peripherals: I2C, SPI, UART, I2S interfaces
  • USB: USB-Micro connector for programming and power
  • Power: 3.3V operating voltage
  • Antenna: Integrated PCB antenna

Dimensions

  • Board Size: 55mm x 28mm (2.17” x 1.10”)
  • Weight: ~10g
  • Form Factor: Standard ESP32 DevKit compatible

Image

ESP-WROOM-32 ESP32 ESP-32S Development Board

Features

  • ESP-WROOM-32 Module: Certified wireless module with 4MB Flash
  • Dual-Core Performance: Two Xtensa LX6 cores for multitasking
  • Dual-Mode Connectivity: WiFi 802.11 b/g/n and Bluetooth Classic/LE
  • Integrated Antenna: PCB antenna with RF amplifier and filter
  • Multiple Operating Modes: AP (Access Point), STA (Station), AP+STA
  • Rich Peripherals: Multiple communication interfaces and GPIO pins
  • Touch Interface: Capacitive touch-enabled GPIO pins
  • Low Power: Ultra-low power consumption with multiple sleep modes
  • Arduino Compatible: Works with Arduino IDE and ESP-IDF

Connectivity

  • WiFi: 802.11 b/g/n 2.4GHz with WPA/WPA2 security
  • Bluetooth: Bluetooth Classic and Low Energy support
  • Antenna: Integrated PCB antenna with RF amplifier
  • Range: Good RF performance for IoT applications

Programming Support

  • Arduino IDE: Full Arduino support with ESP32 core
  • ESP-IDF: Official Espressif development framework
  • PlatformIO: Professional IDE support
  • MicroPython: Community support available
  • LWIP Protocol: TCP/IP stack support
  • FreeRTOS: Real-time operating system support

Power Management

  • Operating Voltage: 3.3V
  • Input Voltage: 5V via USB-Micro
  • Power Consumption: Ultra-low power with sleep modes
  • Sleep Modes: Multiple low-power modes available

Development Features

  • Boot/Reset Buttons: Easy programming and reset functionality
  • LED Indicators: Power and user-programmable LEDs
  • Pin Headers: Standard 2.54mm pitch for breadboard compatibility
  • Compact Design: Optimized for prototyping and development

Supported Protocols

  • LWIP: Lightweight TCP/IP stack
  • FreeRTOS: Real-time operating system
  • WiFi Protocols: WPA/WPA2 security
  • Bluetooth Protocols: Classic and Low Energy profiles

Pinout Diagram

                    ESP32 Development Board Pinout

                    +-----+
         +----------| USB |----------+
         |          +-----+          |
         | [ ]3V3                EN[ ] |
         | [ ]GND               VP[ ] |
         | [ ]D15               VN[ ] |
         | [ ]D2                D34[ ] |
         | [ ]D4                D35[ ] |
         | [ ]D16               D32[ ] |
         | [ ]D17               D33[ ] |
         | [ ]D5                D25[ ] |
         | [ ]D18               D26[ ] |
         | [ ]D19               D27[ ] |
         | [ ]GND               D14[ ] |
         | [ ]D21               D12[ ] |
         | [ ]RX                D13[ ] |
         | [ ]TX                GND[ ] |
         | [ ]D22               VIN[ ] |
         | [ ]D23                     |
         |                           |
         |    [BOOT]  [EN]            |
         +---------------------------+

Note: GPIO pins are 3.3V logic level only

Basic Wiring Examples

ESP32 GPIO2 → LED Anode (long leg)
LED Cathode (short leg) → 220Ω Resistor → ESP32 GND

Note: GPIO2 has built-in LED on most ESP32 boards

Button Input Circuit

ESP32 3V3 → 10kΩ Pull-up Resistor → ESP32 GPIO0
ESP32 GPIO0 → Button → ESP32 GND

Code: digitalRead(0) returns HIGH when not pressed, LOW when pressed

I2C Device Connection

ESP32 3V3 → Device VCC
ESP32 GND → Device GND
ESP32 GPIO21 (SDA) → Device SDA
ESP32 GPIO22 (SCL) → Device SCL
Add 4.7kΩ pull-up resistors on SDA and SCL lines

SPI Device Connection

ESP32 3V3 → Device VCC
ESP32 GND → Device GND
ESP32 GPIO18 (SCK) → Device SCK
ESP32 GPIO19 (MISO) → Device MISO
ESP32 GPIO23 (MOSI) → Device MOSI
ESP32 GPIO5 (CS) → Device CS/SS

Analog Reading

Sensor Output → ESP32 GPIO36 (VP), GPIO39 (VN), or other ADC pins
Code: analogRead(A0) returns 0-4095 (0-3.3V)

Programming Setup Guide

Arduino IDE Setup

  1. Install Arduino IDE 1.8.13 or later
  2. Add ESP32 board package URL in preferences: https://dl.espressif.com/dl/package_esp32_index.json
  3. Install “ESP32 by Espressif Systems” from Board Manager
  4. Select “ESP32 Dev Module” from Tools → Board
  5. Select correct COM port from Tools → Port
  6. Upload code via USB

ESP-IDF Setup

  1. Install ESP-IDF development framework
  2. Set up toolchain and environment variables
  3. Use idf.py commands for building and flashing
  4. More advanced development with full ESP32 features

Programming Examples

Arduino WiFi Connection

#include <WiFi.h>
 
const char* ssid = "your_wifi_name";
const char* password = "your_wifi_password";
 
void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
 
  Serial.println("Connected to WiFi");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}
 
void loop() {
  // Your code here
}

Arduino Bluetooth Example

#include "BluetoothSerial.h"
 
BluetoothSerial SerialBT;
 
void setup() {
  Serial.begin(115200);
  SerialBT.begin("ESP32test"); // Bluetooth device name
  Serial.println("The device started, now you can pair it with bluetooth!");
}
 
void loop() {
  if (Serial.available()) {
    SerialBT.write(Serial.read());
  }
  if (SerialBT.available()) {
    Serial.write(SerialBT.read());
  }
  delay(20);
}

Arduino Web Server Example

#include <WiFi.h>
#include <WebServer.h>
 
const char* ssid = "your_wifi_name";
const char* password = "your_wifi_password";
 
WebServer server(80);
 
void handleRoot() {
  server.send(200, "text/html", "<h1>ESP32 Web Server</h1>");
}
 
void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
 
  server.on("/", handleRoot);
  server.begin();
  Serial.println("HTTP server started");
}
 
void loop() {
  server.handleClient();
}

Important Notes

Voltage Levels

  • GPIO Voltage: 3.3V logic level only
  • Not 5V Tolerant: Do not connect 5V signals directly
  • Power Supply: 3.3V regulated output available
  • Input Voltage: 5V via USB or VIN pin

GPIO Limitations

  • Input Only: GPIO34, GPIO35, GPIO36, GPIO39 are input only
  • Boot Pins: GPIO0, GPIO2, GPIO12, GPIO15 affect boot mode
  • ADC2: Cannot use ADC2 pins when WiFi is active
  • Touch Pins: GPIO0, GPIO2, GPIO4, GPIO12-15, GPIO27, GPIO32-33

Tags

microcontroller, esp32, esp-wroom-32, wifi, bluetooth-le, bluetooth-classic, aitrip, arduino, esp-idf, dual-core, iot, development-board

Notes

This development board is perfect for IoT projects requiring WiFi and Bluetooth connectivity. The ESP32 offers excellent performance with dual-core processing and comprehensive wireless capabilities. The integrated antenna eliminates the need for external antenna connections. Ideal for Arduino IDE development and prototyping of wireless applications. Important: All GPIO pins are 3.3V logic level only - not 5V tolerant!

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