How to Use Arduino Nano ESP32: Examples, Pinouts, and Specs

The Arduino Nano ESP32 (Manufacturer Part ID: Nano-ESP32) is a compact microcontroller board developed by Arduino. It combines the familiar form factor of the Arduino Nano with the powerful ESP32 chip, enabling advanced features such as Wi-Fi and Bluetooth connectivity. This board is designed for IoT (Internet of Things) applications, making it an excellent choice for projects requiring wireless communication, remote monitoring, or smart device integration.

• IoT devices and smart home automation
• Wireless sensor networks
• Remote data logging and monitoring
• Bluetooth-enabled devices
• Robotics and automation systems
• Prototyping for connected devices

The Arduino Nano ESP32 is packed with features that make it versatile and powerful for a wide range of applications. Below are its key technical details:

The Arduino Nano ESP32 features a pinout similar to the classic Arduino Nano, with additional functionality provided by the ESP32 chip. Below is the pin configuration:

The Arduino Nano ESP32 is easy to use and program, making it suitable for both beginners and experienced developers. Below are the steps and best practices for using the board in a circuit.

1. Powering the Board:

   • Use the USB-C port to power the board and upload code.
   • Alternatively, supply 5V to the VIN pin for external power.

2. Connecting Peripherals:

   • Use the digital and analog pins to connect sensors, actuators, and other peripherals.
   • For I2C devices, connect to the SDA and SCL pins.

3. Programming the Board:

   • Install the Arduino IDE and add the ESP32 board package.
   • Select "Arduino Nano ESP32" as the board in the Tools menu.
   • Write and upload your code via the USB-C connection.

4. Using Wi-Fi and Bluetooth:

   • Leverage the ESP32's built-in Wi-Fi and Bluetooth capabilities for wireless communication.
   • Use libraries such as WiFi.h and BluetoothSerial.h for easy implementation.

• Ensure the input voltage does not exceed 5V to avoid damaging the board.
• Use level shifters when interfacing with 5V logic devices, as the board operates at 3.3V.
• Avoid placing the board near sources of electromagnetic interference to maintain reliable wireless communication.
• Use proper decoupling capacitors when connecting external components to reduce noise.

Below is an example of how to connect the Arduino Nano ESP32 to a Wi-Fi network and print the IP address:

#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
  Serial.println("Connecting to Wi-Fi...");

  WiFi.begin(ssid, password); // Start Wi-Fi connection

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000); // Wait for connection
    Serial.print(".");
  }

  Serial.println("\nWi-Fi connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP()); // Print the IP address
}

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

1. The board is not detected by the Arduino IDE:

   • Ensure the correct USB driver is installed for the ESP32.
   • Check that the USB cable is functional and supports data transfer.

2. Wi-Fi connection fails:

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

3. The board overheats:

   • Avoid overloading the GPIO pins with excessive current.
   • Ensure proper ventilation around the board.

4. Code upload fails:

   • Press and hold the BOOT button while uploading the code.
   • Verify that the correct board and port are selected in the Arduino IDE.

Q: Can I use the Arduino Nano ESP32 with 5V sensors?
A: Yes, but you will need level shifters to convert the 5V logic to 3.3V.

Q: Does the board support OTA (Over-The-Air) updates?
A: Yes, the ESP32 supports OTA updates, which can be implemented using the Arduino IDE or other tools.

Q: Can I use the board with the Arduino Nano shields?
A: The pinout is similar, but compatibility depends on the shield's voltage requirements and functionality.

Q: How do I reset the board?
A: Press the RST button or toggle the EN pin to reset the board.

This concludes the documentation for the Arduino Nano ESP32. For further assistance, refer to the official Arduino documentation or community forums.