How to Use eps32_wemos: Examples, Pinouts, and Specs

The ESP32 Wemos development board is a versatile and powerful platform designed for a wide range of Internet of Things (IoT) applications. It features the ESP32 module, which is a dual-core processor with integrated Wi-Fi and Bluetooth capabilities. The board includes a USB connection for programming and serial communication, a battery charging circuit for mobile applications, and various pins and headers for connecting sensors, actuators, and other peripherals.

• Smart home devices
• Wireless sensor networks
• IoT applications
• Wearable electronics
• DIY projects and prototyping

• Microcontroller: ESP32
• Operating Voltage: 3.3V
• Input Voltage (recommended): 5V via USB or battery
• Digital I/O Pins: 22
• Analog Input Pins: 6 (ADC channels)
• Flash Memory: 4MB
• SRAM: 520 KB
• Clock Speed: 240 MHz
• Wi-Fi: 802.11 b/g/n
• Bluetooth: v4.2 BR/EDR and BLE
• USB-to-UART Bridge: CP2102

Note: This is a partial list of pins for illustration purposes. Please refer to the official pinout diagram for complete details.

1. Powering the Board:

   • Connect the USB cable to the board and a computer or USB power source.
   • Alternatively, connect a battery to the designated battery connector.

2. Programming the Board:

   • Install the necessary drivers for the USB-to-UART bridge (CP2102).
   • Use the Arduino IDE or other development environments to write and upload your code.

3. Connecting Peripherals:

   • Use the digital and analog pins to connect sensors and actuators.
   • Ensure that the peripherals are compatible with the board's operating voltage (3.3V).

• Always disconnect the board from power sources before making or altering connections.
• Use a logic level converter if you need to interface with 5V components.
• Avoid drawing more current than the board's maximum rating to prevent damage.
• Use external power sources when connecting power-hungry peripherals.

• Board not recognized by the computer:
  • Ensure the USB cable is properly connected and the drivers are installed.
• Unable to upload code:
  • Check the selected board and port in your development environment.
  • Press the boot button on the board when initiating the upload process.
• Peripherals not working:
  • Verify the connections and ensure that the peripherals are powered correctly.

• Restart the development environment and reconnect the board.
• Use a multimeter to check for proper voltage levels at the board's pins.
• Consult the ESP32 Wemos community forums for support and advice.

// Blink an LED connected to pin 2 on the ESP32 Wemos board
#define LED_PIN 2

void setup() {
  pinMode(LED_PIN, OUTPUT); // Initialize the LED pin as an output
}

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

Note: The above code is a simple example to get started. For more complex applications, refer to the ESP32 Wemos documentation and libraries.

Remember to always check the official documentation for the most up-to-date information on the ESP32 Wemos development board.