How to Use ESP32-S3 Super Mini 4MB : Examples, Pinouts, and Specs

Design with ESP32-S3 Super Mini 4MB in Cirkit Designer

Introduction

The ESP32-S3 Super Mini 4MB, manufactured by Nologo, is a compact and powerful microcontroller designed for IoT and embedded system applications. It features integrated Wi-Fi and Bluetooth 5.0 (LE) capabilities, making it an excellent choice for wireless communication projects. With 4MB of flash memory, this module is well-suited for applications requiring moderate storage and high performance in a small form factor.

Explore Projects Built with ESP32-S3 Super Mini 4MB

ESP32-C3 and Micro SD Card Module for Data Logging

This circuit features an ESP32-C3 microcontroller interfaced with a Micro SD Card Module. The ESP32-C3 handles SPI communication with the SD card for data storage and retrieval, with specific GPIO pins assigned for MOSI, MISO, SCK, and CS signals.

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

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-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

Common Applications and Use Cases

IoT Devices: Smart home automation, environmental monitoring, and connected appliances.
Wearable Technology: Fitness trackers, health monitoring devices, and smart accessories.
Embedded Systems: Robotics, industrial automation, and sensor networks.
Prototyping: Ideal for rapid development of wireless communication projects.
Edge Computing: Lightweight AI/ML applications at the edge.

Technical Specifications

Key Technical Details

Parameter	Value
Microcontroller	ESP32-S3 (Xtensa® 32-bit LX7 dual-core processor)
Clock Speed	Up to 240 MHz
Flash Memory	4MB
RAM	512KB SRAM + 8MB PSRAM (optional, depending on variant)
Wireless Connectivity	Wi-Fi 802.11 b/g/n (2.4 GHz), Bluetooth 5.0 (LE)
GPIO Pins	14 (configurable for digital I/O, ADC, PWM, I2C, SPI, UART, etc.)
Operating Voltage	3.3V
Input Voltage Range	3.0V to 3.6V
Power Consumption	Ultra-low power consumption in deep sleep mode (~10 µA)
Dimensions	20mm x 15mm
Operating Temperature Range	-40°C to +85°C

Pin Configuration and Descriptions

Pin Name	Type	Description
GND	Power	Ground pin. Connect to the ground of the power supply.
3V3	Power	3.3V power input.
EN	Input	Enable pin. Pull high to enable the module, low to disable.
IO0	GPIO/Boot Mode	General-purpose I/O pin. Used for boot mode selection during programming.
IO1-IO13	GPIO	Configurable as digital I/O, ADC, PWM, I2C, SPI, or UART.
RXD	UART Input	UART receive pin.
TXD	UART Output	UART transmit pin.
ADC1/ADC2	Analog Input	Analog-to-digital converter pins.
RST	Input	Reset pin. Active low.

Usage Instructions

How to Use the ESP32-S3 Super Mini 4MB in a Circuit

Powering the Module:
- Supply a stable 3.3V to the 3V3 pin. Ensure the power source can provide sufficient current (at least 500mA).
- Connect the GND pin to the ground of your circuit.
Programming the Module:
- Use a USB-to-UART adapter to connect the module to your computer.
  - Connect the adapter's TX pin to the module's RXD pin.
  - Connect the adapter's RX pin to the module's TXD pin.
  - Connect the adapter's GND to the module's GND.
- Hold the IO0 pin low (connect to GND) while resetting the module to enter bootloader mode.
Connecting Peripherals:
- Use the GPIO pins for interfacing with sensors, actuators, or other devices.
- Configure the pins in your code for the desired functionality (e.g., digital I/O, ADC, PWM).
Wireless Communication:
- Use the built-in Wi-Fi and Bluetooth capabilities for wireless data transmission.
- Configure the network settings in your firmware to connect to a Wi-Fi network or pair with Bluetooth devices.

Important Considerations and Best Practices

Voltage Levels: Ensure all connected peripherals operate at 3.3V logic levels to avoid damaging the module.
Antenna Placement: Avoid placing metal objects or other components near the onboard antenna to ensure optimal wireless performance.
Power Supply: Use a low-noise, stable power supply to prevent issues with Wi-Fi and Bluetooth connectivity.
Deep Sleep Mode: Utilize the deep sleep mode to minimize power consumption in battery-powered applications.

Example Code for Arduino UNO Integration

The ESP32-S3 can be programmed using the Arduino IDE. Below is an example of connecting the module to a Wi-Fi network:

#include <WiFi.h> // Include the Wi-Fi library for ESP32

// Replace with your network credentials
const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

void setup() {
  Serial.begin(115200); // Initialize serial communication
  delay(1000); // Wait for serial monitor to initialize

  Serial.println("Connecting to Wi-Fi...");
  WiFi.begin(ssid, password); // Start Wi-Fi connection

  // Wait until the module connects to the Wi-Fi network
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected to Wi-Fi!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP()); // Print the module's IP address
}

void loop() {
  // Add your main code here
}

Troubleshooting and FAQs

Common Issues and Solutions

Module Not Powering On
- Cause: Insufficient or unstable power supply.
- Solution: Ensure the power source provides a stable 3.3V with at least 500mA current.
Cannot Upload Code
- Cause: Incorrect boot mode or UART connection.
- Solution: Hold the IO0 pin low while resetting the module to enter bootloader mode. Verify the TX and RX connections.
Wi-Fi Connection Fails
- Cause: Incorrect SSID or password, or weak signal strength.
- Solution: Double-check the network credentials and ensure the module is within range of the Wi-Fi router.
Bluetooth Not Discoverable
- Cause: Bluetooth not initialized in the code.
- Solution: Ensure the Bluetooth stack is properly configured in your firmware.
GPIO Pins Not Responding
- Cause: Incorrect pin configuration or voltage mismatch.
- Solution: Verify the pin mode in your code and ensure connected peripherals operate at 3.3V logic levels.

FAQs

Q: Can the ESP32-S3 Super Mini 4MB operate on 5V?
A: No, the module operates at 3.3V. Connecting 5V directly to the pins may damage the module.

Q: How do I reset the module?
A: Pull the RST pin low momentarily to reset the module.

Q: Is the module compatible with Arduino libraries?
A: Yes, the ESP32-S3 is supported by the Arduino IDE and many libraries designed for ESP32.

Q: Can I use the module for battery-powered applications?
A: Yes, the module's ultra-low power consumption in deep sleep mode makes it suitable for battery-powered projects.

This concludes the documentation for the ESP32-S3 Super Mini 4MB.