How to Use uPesy Wroom DevKit V2: Examples, Pinouts, and Specs

The uPesy Wroom DevKit V2 is a compact and versatile development board built around the ESP32-WROOM-32 module. Designed for Internet of Things (IoT) applications, it offers robust Wi-Fi and Bluetooth connectivity, making it an excellent choice for prototyping and developing smart devices. The board features multiple GPIO pins, enabling seamless integration with sensors, actuators, and other peripherals.

• IoT Devices: Smart home automation, environmental monitoring, and connected appliances.
• Wearable Technology: Fitness trackers, health monitoring devices, and portable gadgets.
• Prototyping: Rapid development of wireless communication systems.
• Educational Projects: Ideal for learning embedded systems and IoT concepts.
• Industrial Automation: Remote monitoring and control of machinery.

The uPesy Wroom DevKit V2 features a total of 30 GPIO pins, each with specific functions. Below is the pinout description:

1. Powering the Board:

   • Connect the board to a computer or USB power source using a micro-USB cable.
   • Alternatively, supply 5V to the VIN pin for external power.

2. Programming the Board:

   • Install the Arduino IDE or PlatformIO for development.
   • Add the ESP32 board support package to the IDE.
   • Select the board as ESP32 Dev Module in the IDE settings.
   • Connect the board to your computer and upload your code.

3. Connecting Peripherals:

   • Use the GPIO pins to interface with sensors, actuators, or other devices.
   • Ensure the voltage levels of connected peripherals are compatible with the board's 3.3V logic.

4. Boot and Reset:

   • Use the BOOT button to enter programming mode if required.
   • Press the RST button to reset the board.

• Voltage Levels: Avoid applying voltages higher than 3.3V to the GPIO pins to prevent damage.
• Power Supply: Ensure a stable power supply, especially during Wi-Fi operations, as the board can draw up to 500 mA.
• Pin Multiplexing: Some pins have multiple functions (e.g., ADC, PWM, UART). Configure them appropriately in your code.
• Antenna Placement: For optimal wireless performance, avoid placing the board near metal objects or enclosures.

Below is an example of using the uPesy Wroom DevKit V2 to blink an LED connected to GPIO2:

// Define the GPIO pin for the LED
const int ledPin = 2;

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

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

  // Turn the LED off
  digitalWrite(ledPin, LOW);
  delay(1000); // Wait for 1 second
}

1. Board Not Detected by Computer:

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

2. Code Upload Fails:

   • Check the selected board and port in the IDE.
   • Hold the BOOT button while uploading the code to enter programming mode.

3. Wi-Fi Connection Issues:

   • Verify the SSID and password in your code.
   • Ensure the board is within range of the Wi-Fi router.

4. GPIO Pin Not Working:

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

Q: Can I power the board with a battery?
A: Yes, you can use a 3.7V LiPo battery connected to the 3V3 pin or a 5V source connected to the VIN pin.

Q: Does the board support OTA updates?
A: Yes, the ESP32 module supports Over-The-Air (OTA) updates. You can configure this in your code.

Q: Can I use 5V sensors with this board?
A: Directly connecting 5V sensors to GPIO pins is not recommended. Use a level shifter to step down the voltage to 3.3V.

Q: How do I use the Bluetooth functionality?
A: The ESP32 supports Bluetooth Classic and BLE. Use the BluetoothSerial or BLE library in the Arduino IDE to implement Bluetooth features.