How to Use Keyestudio Control Board for ESP32: Examples, Pinouts, and Specs

The Keyestudio Control Board for ESP32 (part number KS5016) is a versatile and powerful microcontroller board that integrates the ESP32 chip. It is designed to facilitate easy interfacing with a wide range of sensors, actuators, and other electronic components, making it an ideal choice for hobbyists, educators, and professionals working on IoT projects, robotics, smart home applications, and more.

• Microcontroller: ESP32
• Operating Voltage: 3.3V
• Input Voltage (recommended): 7-12V
• Input Voltage (limit): 6-20V
• Digital I/O Pins: 26
• Analog Input Pins: 12
• Flash Memory: 4MB
• SRAM: 520 KB
• Clock Speed: 240 MHz
• Wi-Fi: 802.11 b/g/n
• Bluetooth: v4.2 BR/EDR and BLE

Note: This is a simplified pin configuration for illustrative purposes. Please refer to the official datasheet for a complete pinout and function list.

1. Powering the Board:

   • Connect a 7-12V power supply to the VIN and GND pins.
   • Alternatively, you can power the board via the micro-USB port.

2. Interfacing with Sensors/Actuators:

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

3. Programming the Board:

   • Connect the board to a computer using a micro-USB cable.
   • Use the Arduino IDE or other compatible software to write and upload your code.

• Always disconnect the board from the power source before making or altering connections.
• Be mindful of the power requirements of connected components to avoid overloading the board.
• Use pull-up or pull-down resistors with GPIO pins when necessary to ensure proper logic levels.
• Avoid exposing the board to extreme temperatures, moisture, or mechanical stress.

// Blink an LED connected to GPIO5
#define LED_PIN 5

void setup() {
  pinMode(LED_PIN, OUTPUT); // Initialize GPIO5 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: This example assumes an LED is connected to GPIO5 with a suitable current-limiting resistor.

• Board not recognized by computer:

  • Ensure the micro-USB cable is properly connected and the computer's USB port is functioning.
  • Try using a different USB port or cable.

• Unable to upload code:

  • Check that the correct board and port are selected in the Arduino IDE.
  • Press the EN button to reset the board and try uploading again.

• GPIO pin not functioning:

  • Verify that the pin is not being used by another process.
  • Check your circuit connections and components for any faults.

Q: Can I use the Arduino IDE to program the ESP32 Control Board? A: Yes, the Arduino IDE can be used to program the board after installing the ESP32 add-on.

Q: What is the maximum current that the GPIO pins can source/sink? A: The GPIO pins can typically source/sink up to 12 mA. Refer to the ESP32 datasheet for exact specifications.

Q: Does the board have onboard voltage regulation? A: Yes, the board includes a voltage regulator that provides a stable 3.3V output.

For further assistance, consult the Keyestudio community forums or contact Keyestudio support directly.