How to Use ESP32CUSTOM: Examples, Pinouts, and Specs

The ESP32CUSTOM is a customizable version of the ESP32 microcontroller, designed for advanced IoT applications and rapid prototyping. It features integrated Wi-Fi and Bluetooth capabilities, making it ideal for wireless communication and smart device development. With its powerful dual-core processor and extensive GPIO options, the ESP32CUSTOM is a versatile solution for a wide range of projects, from home automation to industrial IoT systems.

• Smart home devices (e.g., smart lights, thermostats)
• IoT sensors and data loggers
• Wearable technology
• Wireless communication hubs
• Robotics and automation systems
• Prototyping and educational projects

The ESP32CUSTOM offers robust performance and flexibility. Below are its key technical specifications:

The ESP32CUSTOM has a total of 38 pins, with the following key pin assignments:

Note: Some GPIO pins have specific functions (e.g., ADC, PWM). Refer to the ESP32CUSTOM datasheet for detailed pin multiplexing information.

1. Powering the ESP32CUSTOM:

   • Connect the 3.3V pin to a stable 3.3V power source.
   • Ensure the GND pin is connected to the ground of your circuit.
   • Avoid exceeding the input voltage range (3.0V - 3.6V) to prevent damage.

2. Programming the ESP32CUSTOM:

   • Use a USB-to-serial adapter to connect the ESP32CUSTOM to your computer.
   • Install the necessary drivers and the Arduino IDE or ESP-IDF development environment.
   • Select the appropriate board settings in your IDE (e.g., "ESP32 Dev Module").

3. Connecting Peripherals:

   • Use the GPIO pins for interfacing with sensors, actuators, and other devices.
   • Configure the pins in your code for digital or analog input/output as needed.

4. Wireless Communication:

   • Use the built-in Wi-Fi and Bluetooth modules for wireless connectivity.
   • Configure the network settings in your code to connect to a Wi-Fi network or pair with Bluetooth devices.

• Power Supply: Use a low-noise, regulated power supply to ensure stable operation.
• GPIO Voltage Levels: The GPIO pins operate at 3.3V logic levels. Avoid applying 5V to any GPIO pin.
• Boot Mode: To enter programming mode, hold the IO0 pin low while resetting the board.
• Heat Management: If running at high clock speeds or under heavy load, consider adding a heatsink for thermal management.

The following example demonstrates how to connect the ESP32CUSTOM to a Wi-Fi network and send data to a server:

#include <WiFi.h> // Include the Wi-Fi library

// Replace with your network credentials
const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

void setup() {
  Serial.begin(115200); // Initialize serial communication
  delay(1000);

  // Connect to Wi-Fi
  Serial.println("Connecting to Wi-Fi...");
  WiFi.begin(ssid, password);

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

  Serial.println("\nConnected to Wi-Fi!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP()); // Print the assigned IP address
}

void loop() {
  // Add your main code here
}

Note: Replace Your_SSID and Your_PASSWORD with your Wi-Fi network credentials.

1. ESP32CUSTOM Not Connecting to Wi-Fi:

   • Double-check the SSID and password in your code.
   • Ensure the Wi-Fi network is within range and not using unsupported security protocols.

2. Board Not Detected by Computer:

   • Verify that the USB-to-serial adapter is properly connected.
   • Install the correct drivers for your operating system.

3. GPIO Pins Not Responding:

   • Ensure the pins are correctly configured in your code.
   • Check for short circuits or incorrect wiring.

4. Overheating:

   • Reduce the clock speed or workload.
   • Improve ventilation or add a heatsink.

• Q: Can I use 5V sensors with the ESP32CUSTOM?
  A: Yes, but you will need a level shifter to convert the 5V signals to 3.3V.

• Q: How do I reset the ESP32CUSTOM?
  A: Press the EN pin or use the reset button (if available on your board).

• Q: Can I use the ESP32CUSTOM with batteries?
  A: Yes, ensure the battery voltage is within the input range (3.0V - 3.6V) or use a voltage regulator.

This documentation provides a comprehensive guide to using the ESP32CUSTOM microcontroller. For further details, refer to the official datasheet and user manual.