How to Use AZ-Delivery ESP32: Examples, Pinouts, and Specs

The AZ-Delivery ESP32 is a powerful and versatile microcontroller board designed for a wide range of applications. Manufactured by AZ-Delivery, this board features built-in Wi-Fi and Bluetooth capabilities, making it an excellent choice for Internet of Things (IoT) projects, wireless communication, and smart devices. Its dual-core processor and extensive GPIO options provide ample performance and flexibility for both hobbyists and professionals.

• IoT devices and smart home automation
• Wireless sensor networks
• Robotics and control systems
• Data logging and remote monitoring
• Bluetooth-enabled devices
• Prototyping and educational projects

The AZ-Delivery ESP32 is based on the Espressif Systems ESP32 microcontroller. Below are its key technical details:

The ESP32 has a total of 38 pins, with 34 GPIO pins available for use. Below is a table summarizing the key pin functions:

For a complete pinout diagram, refer to the official AZ-Delivery ESP32 datasheet.

1. Powering the ESP32: Connect the VIN pin to a 5V power source or use the micro-USB port for power and programming.
2. Connecting Peripherals: Use the GPIO pins to connect sensors, actuators, or other peripherals. Ensure the voltage levels are compatible (3.3V logic).
3. Programming: The ESP32 can be programmed using the Arduino IDE, MicroPython, or Espressif's ESP-IDF. Install the necessary drivers and libraries before programming.

• Voltage Levels: The ESP32 operates at 3.3V logic. Avoid connecting 5V signals directly to GPIO pins to prevent damage.
• Boot Mode: Ensure GPIO0 is pulled low during boot to enter programming mode.
• Power Supply: Use a stable power source to avoid unexpected resets or instability.
• Wi-Fi Interference: Place the ESP32 away from metal objects or other sources of interference for optimal Wi-Fi performance.

Below is an example of how to use the ESP32 with the Arduino IDE to connect to a Wi-Fi network:

#include <WiFi.h> // Include the Wi-Fi library for ESP32

const char* ssid = "Your_SSID";       // Replace with your Wi-Fi network name
const char* password = "Your_Password"; // Replace with your Wi-Fi password

void setup() {
  Serial.begin(115200); // Initialize serial communication at 115200 baud
  delay(1000);          // Wait for a moment to stabilize

  Serial.println("Connecting to Wi-Fi...");
  WiFi.begin(ssid, password); // Start connecting to the Wi-Fi network

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

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

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

1. ESP32 Not Connecting to Wi-Fi

   • Ensure the SSID and password are correct.
   • Check for interference or weak signal strength.
   • Verify that the router supports 2.4 GHz Wi-Fi (ESP32 does not support 5 GHz).

2. Board Not Detected by Computer

   • Install the correct USB-to-serial driver (e.g., CP2102 or CH340).
   • Use a high-quality USB cable that supports data transfer.

3. Program Upload Fails

   • Ensure GPIO0 is pulled low during programming.
   • Press and hold the "BOOT" button while uploading the code.

4. Random Resets or Instability

   • Use a stable power supply with sufficient current (at least 500 mA).
   • Check for loose connections or short circuits.

Q: Can the ESP32 be powered directly from a 5V source?
A: Yes, the VIN pin can accept 5V input, which is regulated down to 3.3V internally.

Q: Does the ESP32 support OTA (Over-the-Air) updates?
A: Yes, the ESP32 supports OTA updates, allowing you to upload new firmware wirelessly.

Q: Can I use the ESP32 with MicroPython?
A: Absolutely! The ESP32 is compatible with MicroPython, and you can flash the firmware to use it.

Q: How do I reset the ESP32?
A: Press the "EN" button on the board to reset the ESP32.

For additional support, refer to the official AZ-Delivery documentation or community forums.