How to Use Durian ESP32: Examples, Pinouts, and Specs

The Durian ESP32 is a powerful and versatile microcontroller board designed for a wide range of applications, particularly in the Internet of Things (IoT) domain. It features built-in Wi-Fi and Bluetooth capabilities, making it ideal for wireless communication and smart device integration. With multiple GPIO pins, analog-to-digital converters (ADCs), and support for various programming environments such as Arduino IDE, MicroPython, and ESP-IDF, the Durian ESP32 is suitable for both hobbyists and professionals.

• IoT devices and smart home automation
• Wireless sensor networks
• Robotics and automation systems
• Wearable technology
• Data logging and remote monitoring
• Prototyping and educational projects

The Durian ESP32 offers robust hardware capabilities to support a variety of applications. Below are its key technical specifications:

The Durian ESP32 has a total of 38 pins, with the following key functionalities:

The Durian ESP32 is easy to integrate into a variety of projects. Below are the steps and best practices for using the board:

1. Powering the Board:

   • Use the VIN pin to supply 5V or connect the board via a USB cable to your computer or power source.
   • Ensure the power supply is stable to avoid damaging the board.

2. Connecting Peripherals:

   • Use the GPIO pins to connect sensors, actuators, or other peripherals.
   • For analog sensors, connect them to the ADC pins (e.g., GPIO34-GPIO39).

3. Programming the Board:

   • Install the Arduino IDE or another supported environment (e.g., MicroPython or ESP-IDF).
   • Select "ESP32 Dev Module" as the board in the Arduino IDE.
   • Connect the board to your computer via USB and upload your code.

The following example demonstrates how to blink an LED connected to GPIO2:

// Example: Blink an LED on GPIO2
// Ensure the LED is connected to GPIO2 with a current-limiting resistor.

#define LED_PIN 2  // Define the GPIO pin for the LED

void setup() {
  pinMode(LED_PIN, OUTPUT);  // Set GPIO2 as an output pin
}

void loop() {
  digitalWrite(LED_PIN, HIGH);  // Turn the LED on
  delay(1000);                  // Wait for 1 second
  digitalWrite(LED_PIN, LOW);   // Turn the LED off
  delay(1000);                  // Wait for 1 second
}

• Voltage Levels: The GPIO pins operate at 3.3V. Avoid applying 5V directly to these pins to prevent damage.
• Power Consumption: Use the ultra-low power modes for battery-powered applications.
• Wi-Fi and Bluetooth: Avoid placing the board near metal objects or enclosures that may interfere with wireless signals.

1. The board is not detected by the computer:

   • Ensure the USB cable is functional and supports data transfer.
   • Install the correct USB-to-serial driver for the Durian ESP32.

2. Code upload fails:

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

3. Wi-Fi connection issues:

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

4. GPIO pin not working:

   • Confirm the pin is not being used for another function (e.g., ADC, UART).
   • Check for short circuits or incorrect wiring.

• Can I power the Durian ESP32 with a battery?
  Yes, you can use a 3.7V LiPo battery connected to the 3V3 pin or a 5V source to the VIN pin.

• What is the maximum current output of the GPIO pins?
  Each GPIO pin can source or sink up to 12mA. For higher currents, use an external transistor or relay.

• Can I use the Durian ESP32 with MicroPython?
  Yes, the Durian ESP32 supports MicroPython. Flash the MicroPython firmware to the board and use a compatible IDE like Thonny.

By following this documentation, you can effectively utilize the Durian ESP32 for your projects and troubleshoot common issues with ease.