25.Jun.2025
Introduction
ESP32-C3 SuperMini stands out as a compact version of the ESP32-C3 series developed by Espressif Systems. It offers an ideal option for IoT (Internet of Things) projects with its low cost, low power consumption and powerful Wi-Fi/Bluetooth features. In this article, we will examine the features, usage areas and a simple web server example of ESP32-C3 SuperMini.
What is ESP32-C3?
ESP32-C3 is a member of Espressif's popular ESP32 series. This microcontroller, which has a RISC-V based single-core processor, is designed especially for IoT applications. ESP32-C3 SuperMini offers this powerful chip in a compact board design, providing a perfect solution for projects with space constraints. Thanks to its small dimensions (approximately 22.5 x 18 mm), it is frequently preferred in wearable devices, sensor modules and prototype projects.
ESP32-C3 SuperMini Features
ESP32-C3 SuperMini stands out with the following features:
Processor: 32-bit RISC-V single-core processor (up to 160 MHz).
Connectivity: 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5.0 (BLE) support.
Memory: 400 KB SRAM, 384 KB ROM and 8 KB RTC SRAM.
GPIO Pins: 22 programmable GPIO pins (ADC, PWM, I2C, SPI, UART supported).
Low Power Consumption: Low power consumption down to 5 µA in deep sleep mode.
Compact Design: Suitable for tight spaces with dimensions of 22.5 x 18 mm.
Programming: Compatible with Arduino IDE, PlatformIO and Espressif IDF.
Security: Supports RSA-3072-based secure boot and AES-128/256 encryption.
These features make the ESP32-C3 SuperMini a versatile option for both hobby projects and industrial IoT applications.
Areas of Use
With its compact size and powerful connectivity, the ESP32-C3 SuperMini has a wide range of uses:
IoT Devices: Smart home systems (e.g. smart plugs, thermostats).
Wearable Technologies: Smart watches and fitness trackers.
Sensor Networks: Data collection for environmental sensors (temperature, humidity, motion).
Automation Projects: Relay control, motor drivers and home automation.
Education and Prototyping: A cost-effective option for Arduino-based projects.
Wireless Communication: Data transfer and control systems based on Wi-Fi or Bluetooth.
A Simple Web Server Example
It is quite easy to create a web server with ESP32-C3 SuperMini. Below is an example of a web server in Wi-Fi access point mode that can be run with Arduino IDE. This application provides a simple HTML page that can be accessed from the browser and the IP address is customized.
#include <WiFi.h>
#include <WebServer.h>
// Wi-Fi settings
const char* ssid="ESP32C3_WebServer";
const char* password="12345678";
// The web server will run on port 80
WebServer server(80);
void handleRoot() {
String html="<!DOCTYPE html><html>";
html +="<head><title>ESP32-C3 Web Server</title></head>";
html +="<body><h1>Hello, ESP32-C3 SuperMini!</h1>";
html +="<p>This is a simple web server.</p>";
html +="</body></html>";
server.send(200, "text/html", html);
}
void setup() {
Serial.begin(115200);
delay(1000);
Serial.println("Starting ESP32-C3 Web Server...");
// IP address configuration
IPAddress local_IP(192, 168, 1, 1); // Customized IP
IPAddress gateway(192, 168, 1, 1);
IPAddress subnet(255, 255, 255, 0);
WiFi.softAPConfig(local_IP, gateway, subnet);
WiFi.softAP(ssid, password);
Serial.println("Access Point Started");
Serial.print("IP Address: ");
Serial.println(WiFi.softAPIP());
server.on("/", handleRoot);
server.begin();
Serial.println("Web server started");
}
void loop() {
server.handleClient();
}
Running the Code
1. Add ESP32 support to Arduino IDE (URL: https://raw.githubusercontent.com/espressif/arduino-esp32/master/package/package_esp32_index.json).
2. Select ESP32-C3 Dev Module as the board.
3. Upload the code and open the serial monitor (115200 baud).
4. Connect to ESP32C3_WebServer from your phone or computer (password: 12345678).
5. Go to 192.168.1.1 in the browser to see the HTML page.
This example shows how to create a web server using the Wi-Fi capabilities of the ESP32-C3 SuperMini. The IP address is customized with WiFi.softAPConfig().
Why ESP32-C3 SuperMini?
The ESP32-C3 SuperMini is an ideal choice for IoT projects with its small size, low power consumption, and strong connectivity. It is easy to use even for beginners thanks to its Arduino and PlatformIO support. In addition, its affordable price (typically 5-10 USD) makes it an affordable option for hobby projects and prototyping.
Conclusion
The ESP32-C3 SuperMini is a perfect solution for those looking for a compact and powerful microcontroller in the IoT world. With Wi-Fi and Bluetooth connectivity, wide GPIO options and low power consumption, it can be used in both hobby projects and professional applications.
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