Tutorial: ESP32-C3 Super Mini

Welcome to the comprehensive guide for the ESP32-C3 Super Mini board. This repository includes everything you need to get started and work with the ESP32-C3 Super Mini.

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Table of Contents

1. Introduction
2. Board Specifications
3. Pinout Diagram and Details
4. Getting Started
   • Hardware Requirements
   • Setting Up the Arduino IDE
5. Supported Interfaces
6. Example Projects
7. Troubleshooting
8. References
9. License

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Introduction

The ESP32-C3 Super Mini is a compact and versatile development board powered by the ESP32-C3 microcontroller. It offers robust Wi-Fi and Bluetooth Low Energy (BLE) connectivity, making it ideal for IoT, smart devices, and wireless sensor networks.

Key features include:

• Compact form factor with excellent GPIO access.
• RISC-V single-core processor for efficient performance.
• Comprehensive Wi-Fi and BLE 5.0 capabilities.

This guide will walk you through its setup, pinout, and how to create projects using the Arduino IDE.

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Board Specifications

Feature	Details
Microcontroller	ESP32-C3 FN4 (RISC-V single-core processor @160 MHz)
Connectivity	Wi-Fi (2.4 GHz 802.11 b/g/n), BLE 5.0
GPIO Pins	10 Digital I/O, 2 Analog inputs
ADC	6 channels of 12-bit SAR ADC
Flash Memory	4MB
Power Supply	5V via USB-C, onboard 3.3V regulator
Operating Voltage	3.3V
Dimensions	Ultra-compact, ideal for space-constrained applications

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Pinout Diagram and Details

Pin Mappings

Pin Name	GPIO	Function
0	GPIO0	ADC1, PWM
1	GPIO1	ADC1, PWM
2	GPIO2	ADC1, Strapping Pin (Boot Mode)
3	GPIO3	ADC1, PWM
4	GPIO4	JTAG, ADC1
5	GPIO5	JTAG
8	GPIO8	Status LED (inverted), Strapping Pin
9	GPIO9	BOOT Button, Strapping Pin
10	GPIO10	PWM
20	GPIO20	General-purpose I/O
21	GPIO21	General-purpose I/O

Key Notes:

• GPIO8: Connected to an inverted blue status LED.
• GPIO9: Connected to the BOOT button.
• JTAG Support: GPIO4–GPIO7 pins are reserved for debugging.

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Getting Started

Hardware Requirements

To get started with the ESP32-C3 Super Mini, you’ll need:

• ESP32-C3 Super Mini board
• Computer (Windows, macOS, or Linux)
• USB Type-C data cable (ensure it supports data transfer, not just power)

Setting Up the Arduino IDE

1. Install the Arduino IDE

1. Download the latest Arduino IDE from the official website.
2. Follow the installation instructions for your operating system.

2. Install USB Drivers (Windows Only)

• For boards with CP210x or CH340 USB-to-UART bridge chips, install the respective drivers:
  • CP210x Drivers
  • CH340 Drivers

3. Add ESP32 Board Support

1. Open the Arduino IDE and go to File > Preferences.
2. In the "Additional Board Manager URLs" field, add:

   https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
   

   
3. Click OK to save your preferences.
4. Go to Tools > Board > Boards Manager, search for "ESP32," and install the ESP32 by Espressif Systems package.

4. Select the Board and Port

1. Connect your ESP32-C3 Super Mini to the computer.

   

2. Go to Tools > Port and select the corresponding serial port for your device. This will usually be COM3 or higher on Windows, and /dev/ttyUSBx or /dev/ttyACMx on Linux/macOS.

   

   Optional: Enable USB CDC on Boot If you are experiencing issues with serial communication or your device is not being recognized correctly after a reset, you can enable the "USB CDC on Boot" option:

   1. Go to Tools > USB CDC on Boot.
   2. Select Enabled.

   Note: Enabling "USB CDC on Boot" allows the USB connection to remain active during boot, which can help resolve issues where the serial port is not detected after the ESP32-C3 restarts.

5. Upload a Test Sketch

1. Open a new sketch in the Arduino IDE.
2. Add a simple example like the Blink sketch (Blink Project).
3. Click Upload to send the sketch to your ESP32-C3.

If everything is set up correctly, the LED on the ESP32-C3 should start blinking, indicating that the upload was successful.

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Supported Interfaces

The ESP32-C3 Super Mini supports a wide range of peripherals:

Interface	Description
Wi-Fi	2.4 GHz b/g/n, WPA3
Bluetooth	BLE 5.0, long range
UART	2 interfaces
SPI	3 interfaces (SPI0, SPI1 reserved)
I²C	Configurable on GPIO pins
I²S	1 interface (Full-duplex audio support)
PWM	Up to 6 channels
ADC	6 channels, 12-bit resolution
JTAG	Debugging via GPIO4–GPIO7

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Example Projects

1. Blink LED:

A basic example to blink an LED.

• Guide: Blink Project
• Code: blink.ino

2. ESP32 C3 Super Mini with DHT11/DHT22:

Read temperature and humidity using DHT11/DHT22.

• Guide: ESP32 C3 Super Mini with DHT11
• Code: ESP32_C3_Super_Mini_with_DHT11.ino

3. ESP32-C3 Super Mini with DHT11/DHT22 - Display values using web server:

To read temperature and humidity data from a DHT11/DHT22 sensor and display these values on a web server.

• Guide: Read DHT11/DHT22 - Display Values Using Web Server
• Code: ESP32_C3_Super_Mini_with_DHT11_webServer.ino

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Troubleshooting

Common Issues:

1. Serial Port Not Detected:

   • Ensure you’re using a data-capable USB cable.
   • Reconnect the board and restart the Arduino IDE.

2. Sketch Upload Fails:

   • Press and hold the BOOT button during upload.
   • Verify correct board and port settings.

3. LED Not Blinking:

   • Double-check the GPIO pin definitions in your sketch.

4. Use Serial Monitor:

   • After uploading a sketch, open the Serial Monitor (Tools > Serial Monitor) to view any output. Make sure the baud rate is set to 115200 to match the Serial.begin(115200); statement in your code.

   Further Resources: ESP32 Troubleshooting Guide

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Contributing

Contributions are welcome! Please fork this repository and submit a pull request with your improvements. Follow the contributing guidelines.

References

• ESP32 C3 Super Mini Deatailed Board Summery

• wiki.icbbuy.com for setup

• Espressif datasheets

• platformio/espressif32 boards

• ESPHome: ESP32 Platform

• ESPHome: (ESP32 platform): ESP-IDF Framework

• esp32_c3_datasheet.pdf

License

This project is licensed under the MIT License - see the LICENSE file for details.