How to Use ESP32-WROOM: Examples, Pinouts, and Specs

The ESP32-WROOM, manufactured by AZ-Delivery, is a powerful and versatile Wi-Fi and Bluetooth module based on the ESP32 microcontroller. It is designed for a wide range of applications, including Internet of Things (IoT) devices, embedded systems, and smart home automation. The ESP32-WROOM offers robust performance, low power consumption, and a rich set of features, making it an ideal choice for both hobbyists and professionals.

1. Power Supply: Connect the 3V3 pin to a 3.3V power supply and the GND pin to ground.
2. Boot Mode: To upload code, connect GPIO0 to GND and press the EN button to enter boot mode.
3. UART Communication: Use GPIO1 (TXD) and GPIO3 (RXD) for serial communication with a computer or other devices.
4. GPIO Usage: Connect sensors, actuators, and other peripherals to the available GPIO pins as needed.
5. Wi-Fi and Bluetooth: Use the built-in Wi-Fi and Bluetooth capabilities for wireless communication.

• Voltage Levels: Ensure that all connected devices operate at 3.3V logic levels to avoid damaging the ESP32-WROOM.
• Power Supply: Use a stable power supply to prevent unexpected resets or malfunctions.
• Heat Dissipation: Provide adequate ventilation or heat sinking if the module operates in high-temperature environments.
• Firmware Updates: Regularly update the firmware to benefit from the latest features and security patches.

#include <WiFi.h>

// Replace with your network credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

void setup() {
  Serial.begin(115200);
  delay(10);

  // Connect to Wi-Fi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {
  // Add your main code here, to run repeatedly
}

1. Module Not Responding: Ensure that the power supply is stable and all connections are secure.
2. Wi-Fi Connection Issues: Verify the SSID and password, and check for interference from other devices.
3. Code Upload Failures: Make sure GPIO0 is connected to GND during the upload process and that the correct board and port are selected in the Arduino IDE.

• Check Connections: Double-check all wiring and connections to ensure they are correct and secure.
• Use Serial Monitor: Utilize the Serial Monitor in the Arduino IDE to debug and view error messages.
• Update Drivers: Ensure that the USB-to-serial drivers are up to date on your computer.
• Reset Module: If the module becomes unresponsive, press the EN button to reset it.

By following this documentation, users can effectively utilize the ESP32-WROOM module in their projects, leveraging its powerful features for a wide range of applications.