How to Use uPesy ESP32 Wroom Low Power DevKit: Examples, Pinouts, and Specs

The uPesy ESP32 Wroom Low Power DevKit (v1.2) is a compact and efficient development board designed for Internet of Things (IoT) applications. It features the powerful ESP32 Wroom module, which integrates Wi-Fi and Bluetooth capabilities, making it ideal for creating connected devices. This development kit is optimized for low-power consumption, making it suitable for battery-powered projects and energy-efficient designs.

• Smart home devices (e.g., connected lights, thermostats)
• Wearable technology
• Remote monitoring and control systems
• IoT prototyping and development
• Wireless sensor networks
• Educational projects and learning platforms

The following table outlines the key technical details of the uPesy ESP32 Wroom Low Power DevKit:

The uPesy ESP32 Wroom Low Power DevKit features a 30-pin layout. Below is a summary of the pin configuration:

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 your IDE.
   • Select the correct board (ESP32 Dev Module) and port in the IDE settings.

3. Connecting Peripherals:

   • Use the GPIO pins to connect sensors, actuators, or other peripherals.
   • Ensure that the voltage levels of connected devices are compatible with the 3.3V logic of the ESP32.

4. Uploading Code:

   • Write your code in the IDE and upload it to the board via the USB connection.
   • Press the "EN" button to reset the board if needed.

• Voltage Levels: Avoid applying voltages higher than 3.3V to the GPIO pins to prevent damage.
• Deep Sleep Mode: Use the deep sleep mode to minimize power consumption in battery-powered applications.
• Boot Mode: To enter bootloader mode, hold the IO0 pin low while resetting the board.
• External Antenna: For better Wi-Fi performance, consider using an external antenna if supported.

Below is an example of how to blink an LED connected to GPIO2 of the uPesy ESP32 Wroom Low Power DevKit:

// Example: Blink an LED connected to GPIO2 of the uPesy ESP32 Wroom Low Power DevKit

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

void setup() {
  // Initialize the LED 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. 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 ESP32.

2. Code upload fails:

   • Check that the correct board and port are selected in the IDE.
   • Hold the IO0 pin low while pressing the "EN" button to enter bootloader 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. High power consumption:

   • Use deep sleep mode to reduce power usage.
   • Disconnect unused peripherals to minimize current draw.

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

• Q: Does the board support OTA updates?
  A: Yes, the ESP32 supports Over-The-Air (OTA) updates for wireless code uploads.

• Q: Can I use the board with MicroPython?
  A: Yes, the ESP32 is compatible with MicroPython. Flash the MicroPython firmware to get started.

• Q: What is the maximum Wi-Fi range?
  A: The range depends on environmental factors but typically extends up to 100 meters in open space.