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

The ESP32 TTGO is a versatile and powerful development board that integrates an ESP32 module with WiFi and Bluetooth capabilities, along with a 3.2-inch color touchscreen display. This board is ideal for Internet of Things (IoT) projects, smart home applications, and any wireless-enabled device development. Its rich set of I/O pins and interfaces makes it suitable for a wide range of applications, from simple LED control to complex graphical user interfaces.

• Microcontroller: ESP32
• Operating Voltage: 3.3V
• Input Voltage: 7-12V
• Digital I/O Pins: 38
• Analog Input Pins: 18
• Flash Memory: 4MB
• SRAM: 520 KB
• Clock Speed: 240 MHz
• Built-in WiFi: 802.11 b/g/n
• Built-in Bluetooth: v4.2 BR/EDR and BLE
• Display: 3.2-inch color touchscreen

To get started with the ESP32 TTGO, you will need to:

1. Connect the board to your computer using a micro USB cable.
2. Install the necessary drivers for the USB-to-UART bridge chip.
3. Install the ESP32 board support package in your Arduino IDE or preferred development environment.
4. Select the correct board and port in your development environment.

When programming the ESP32 TTGO, ensure that:

• The board is powered correctly, either through USB or an external power supply.
• The correct board configuration is selected in your development environment.
• You understand the pinout and functionality of the ESP32 to avoid damage.

To use the built-in touchscreen display, you will need to:

1. Install the appropriate display library that supports the screen's controller.
2. Initialize the display in your code and use the library's functions to draw graphics or text.

For WiFi and Bluetooth functionality:

• Use the WiFi.h and BluetoothSerial.h libraries included with the ESP32 board package.
• Follow the examples provided with the libraries to connect to a network or pair with other Bluetooth devices.

• Always disconnect the board from power when making changes to the circuit.
• Use a logic level converter if interfacing with 5V devices.
• Avoid drawing too much current from the I/O pins to prevent damage.

Below is a simple example of how to connect the ESP32 TTGO to a WiFi network:

#include <WiFi.h>

// Replace with your network credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

void setup() {
  Serial.begin(115200);
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
}

void loop() {
  // Your code here
}

• Board not recognized: Ensure drivers are installed and the USB cable is functioning.
• Display not working: Verify the correct library is installed and pins are configured properly.
• WiFi/Bluetooth not connecting: Check your network credentials and device compatibility.

Q: How do I reset the ESP32 TTGO? A: Press the EN button on the board to reset it.

Q: Can I use the ESP32 TTGO with a battery? A: Yes, you can power the board with a battery connected to the VIN pin, ensuring the voltage is within the specified range.

Q: What is the maximum current draw from an I/O pin? A: The maximum current per I/O pin is 12 mA.

For further assistance, consult the ESP32 TTGO community forums or the manufacturer's support resources.