How to Use GOOUUU-ESP32-C3: Examples, Pinouts, and Specs

Introduction

The GOOUUU-ESP32-C3 is a compact, low-power microcontroller board built around the ESP32-C3 chip. It features integrated Wi-Fi and Bluetooth Low Energy (BLE) connectivity, making it an excellent choice for Internet of Things (IoT) applications. This board is designed to support a wide range of sensors and peripherals, offering versatile GPIO pins, ADCs, and other interfaces. Its small form factor and energy efficiency make it ideal for smart home devices, wearables, and industrial IoT solutions.

Explore Projects Built with GOOUUU-ESP32-C3

Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!

ESP32C3 and LoRa-Enabled Environmental Sensing Node

This circuit features an ESP32C3 Supermini microcontroller connected to a LORA_RA02 module and a DHT11 temperature and humidity sensor. The ESP32C3 handles communication with the LORA module via SPI (using GPIO05, GPIO06, GPIO10, and GPIO04 for MISO, MOSI, NSS, and SCK respectively) and GPIO01 and GPIO02 for additional control signals. The DHT11 sensor is interfaced through GPIO03 for data reading, and all components share a common power supply through the 3.3V and GND pins.

Open Project in Cirkit Designer

ESP32-Powered NTP Clock with Multiple GC9A01 Displays

This circuit features an ESP32 microcontroller connected to multiple GC9A01 displays and a USB Type C breakout for power. The ESP32 runs a sketch to retrieve the current time from an NTP server over WiFi and displays the hours and minutes across the GC9A01 displays, with each display showing a single digit or colon separator. Pushbuttons are connected to GPIOs on the ESP32, potentially for user input to control display functions or settings.

Open Project in Cirkit Designer

ESP32-S3 GPS and Wind Speed Logger with Dual OLED Displays and CAN Bus

This circuit features an ESP32-S3 microcontroller interfaced with an SD card module, two OLED displays, a GPS module, and a CAN bus module. The ESP32-S3 records GPS data to the SD card, displays speed on one OLED, and shows wind speed from the CAN bus on the other OLED, providing a comprehensive data logging and display system.

Open Project in Cirkit Designer

ESP32C3 Supermini-Based Smart Environment Monitor and Lighting Control System

This is a smart control system featuring an ESP32C3 Supermini microcontroller for interfacing with various sensors and actuators. It includes temperature and humidity sensing, RGB LED strip control, user input via a pushbutton and rotary encoder, and AC power control through a two-channel relay. The system is powered by an AC source converted to DC by the HLK-PM12 module.

Open Project in Cirkit Designer

Common Applications and Use Cases

• Smart home automation (e.g., lighting, thermostats, security systems)
• Wearable devices and health monitoring
• Industrial IoT (e.g., sensor networks, predictive maintenance)
• Wireless data logging and monitoring
• Prototyping and development of connected devices

Technical Specifications

The GOOUUU-ESP32-C3 offers the following key technical features:

Pin Configuration and Descriptions

The GOOUUU-ESP32-C3 has a total of 22 GPIO pins, which can be configured for various functions. Below is the pinout description:

Usage Instructions

How to Use the GOOUUU-ESP32-C3 in a Circuit

1. Powering the Board:

   • Connect the board to a 5V power source via the USB-C port. The onboard voltage regulator will step down the voltage to 3.3V.
   • Alternatively, supply 3.3V directly to the 3V3 pin.

2. Programming the Board:

   • Use the Arduino IDE or ESP-IDF (Espressif IoT Development Framework) to program the board.
   • Select "ESP32-C3 Dev Module" as the board in the Arduino IDE.

3. Connecting Peripherals:

   • Use the GPIO pins to connect sensors, actuators, or other peripherals.
   • Ensure that the voltage levels of connected devices are compatible with the 3.3V logic of the board.

4. Wi-Fi and Bluetooth Setup:

   • Use the built-in libraries (e.g., WiFi.h and BLEDevice.h in Arduino) to configure wireless connectivity.

Important Considerations and Best Practices

• Avoid supplying voltages higher than 3.3V to the GPIO pins to prevent damage.
• Use pull-up or pull-down resistors as needed for input pins.
• When using ADC channels, ensure the input voltage does not exceed 3.3V.
• For low-power applications, utilize the deep sleep mode to conserve energy.

Example Code for Arduino UNO Integration

Below is an example of how to use the GOOUUU-ESP32-C3 to read a temperature sensor and send the data over Wi-Fi:

#include <WiFi.h> // Include Wi-Fi library

// Wi-Fi credentials
const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

// Pin configuration
const int tempSensorPin = 34; // ADC pin connected to the temperature sensor

void setup() {
  Serial.begin(115200); // Initialize serial communication
  WiFi.begin(ssid, password); // Connect to Wi-Fi

  // Wait for Wi-Fi connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to Wi-Fi...");
  }
  Serial.println("Connected to Wi-Fi!");
}

void loop() {
  // Read temperature sensor value
  int sensorValue = analogRead(tempSensorPin);
  
  // Convert sensor value to voltage (assuming 3.3V reference)
  float voltage = sensorValue * (3.3 / 4095.0);
  
  // Print the voltage to the serial monitor
  Serial.print("Sensor Voltage: ");
  Serial.println(voltage);

  delay(1000); // Wait 1 second before the next reading
}

Troubleshooting and FAQs

Common Issues and Solutions

1. The board is not detected by the computer:

   • Ensure the USB cable is functional and supports data transfer.
   • Install the necessary USB-to-serial drivers for the ESP32-C3.

2. Wi-Fi connection fails:

   • Double-check the SSID and password.
   • Ensure the Wi-Fi network is operating on the 2.4 GHz band (not 5 GHz).

3. GPIO pins are not functioning as expected:

   • Verify the pin configuration in your code.
   • Check for conflicting pin assignments.

4. The board overheats:

   • Ensure the input voltage does not exceed 5V.
   • Avoid drawing excessive current from the GPIO pins.

FAQs

• Can I use 5V sensors with the GOOUUU-ESP32-C3?
  No, the GPIO pins operate at 3.3V logic. Use a level shifter for 5V sensors.

• What is the maximum Wi-Fi range?
  The range depends on environmental factors but typically extends up to 50 meters indoors.

• Does the board support OTA (Over-the-Air) updates?
  Yes, the ESP32-C3 supports OTA updates for firmware.

• Can I use the board with batteries?
  Yes, you can power the board with a 3.7V LiPo battery connected to the 3V3 pin, but ensure proper regulation.