What You'll Need

• ESP32 Development Board

• DHT22 (or DHT11) Temperature & Humidity Sensor

• Jumper wires

• Breadboard

  
  

What It Does

This project reads temperature and humidity from a DHT sensor. It displays the values in the Arduino Serial Monitor. From here, you can easily expand the project by uploading the data to Home Assistant, MQTT, Blynk, or a cloud dashboard.

Wiring

Arduino Code

```cpp

include <DHT.h>

define DHTPIN 4

define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

void setup() {

Serial.begin(115200);

dht.begin();

}

void loop() {

delay(2000);

float h = dht.readHumidity();

float t = dht.readTemperature();

Serial.print("Humidity: ");

Serial.print(h);

Serial.print(" %\t");

Serial.print("Temperature: ");

Serial.print(t);

Serial.println(" *C");

}

```

Possible Upgrades

• Send readings to MQTT

• Build a web dashboard

• Display values on an OLED

• Log data to an SD card

  
  

Project 2 – Control an LED Using Your Phone

One of the biggest advantages of the ESP32 is its built-in Wi-Fi. Instead of pressing a physical button, you can control hardware from any device on your local network.

Components

• ESP32

• LED

• 220Ω resistor

  
  

Wiring

Arduino Code

```cpp

include <WiFi.h>

const char* ssid = "your_SSID";

const char* password = "your_PASSWORD";

WiFiServer server(80);

void setup() {

Serial.begin(115200);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {

delay(1000);

Serial.println("Connecting to WiFi...");

}

server.begin();

Serial.println("Server started");

}

void loop() {

WiFiClient client = server.available();

if (client) {

String request = client.readStringUntil('\r');

client.flush();

if (request.indexOf("/LED=ON") != -1) {

digitalWrite(2, HIGH);

} else if (request.indexOf("/LED=OFF") != -1) {

digitalWrite(2, LOW);

}

client.println("HTTP/1.1 200 OK");

client.println("Content-Type: text/html");

client.println();

client.println("<!DOCTYPE HTML>");

client.println("<html>");

client.println("<a href=\"/LED=ON\">Turn On</a><br>");

client.println("<a href=\"/LED=OFF\">Turn Off</a><br>");

client.println("</html>");

client.stop();

}

}

```

What You'll Learn

• Connecting an ESP32 to Wi-Fi

• Running a simple web server

• GPIO output control

• Basic IoT concepts

  
  

Project 3 – Bluetooth Serial Terminal

The ESP32 includes Bluetooth Classic and BLE. This allows wireless communication with phones, tablets, and computers. In this project, your phone becomes a wireless serial terminal.

Components

• ESP32

• Android phone with a Bluetooth Terminal app

  
  

Arduino Code

```cpp

include <BluetoothSerial.h>

BluetoothSerial SerialBT;

void setup() {

Serial.begin(115200);

SerialBT.begin("ESP32"); // Name of the Bluetooth device

}

void loop() {

if (SerialBT.available()) {

String command = SerialBT.readString();

Serial.println(command);

}

}

```

What You'll Learn

• Bluetooth communication

• Wireless debugging

• Serial data transfer

• Mobile integration

  
  

Why Choose an ESP32?

Compared to traditional Arduino Uno boards, the ESP32 offers significantly more processing power and built-in wireless connectivity. Some of its key features include:

• Dual-core processor running at up to 240 MHz

• Integrated Wi-Fi

• Bluetooth Classic and BLE

• More than 30 GPIO pins

• ADC, DAC, SPI, I²C, UART, and PWM support

• Compatible with Arduino IDE and ESP-IDF

  
  

These capabilities make it suitable for smart home automation, robotics, wireless sensors, industrial monitoring, and Internet of Things (IoT) applications.

Getting Started

Programming the board is straightforward:

1. Install the Arduino IDE.

2. Add the ESP32 Board Manager package.

3. Install the CH340 USB driver if required.

4. Connect the board using a USB-C data cable.

5. Select the correct COM port.

6. Upload your sketch.

   
   

If your computer doesn't detect the board, ensure you're using a USB cable that supports both data and charging. Some USB-C cables are power-only.

Ready to Start Building?

Whether you're creating smart home devices, learning embedded programming, or developing commercial IoT products, the ESP32 Development Board with CH340C USB-C provides an affordable and powerful platform to bring your ideas to life.

Explore the product here: ESP32 Development Board with CH340C USB-C.

At only R110, it's one of the best-value development boards available for anyone looking to dive into the world of embedded systems, wireless communication, and IoT development.