How to Use EWP32-S3 Supermini: Examples, Pinouts, and Specs

The EWP32-S3 Supermini, manufactured by ACEIRMC (Part ID: ESP32-S3), is a compact, low-power microcontroller module tailored for Internet of Things (IoT) applications. It combines built-in Wi-Fi and Bluetooth connectivity, making it an excellent choice for wireless communication in small, energy-efficient devices. Its small form factor and robust performance make it suitable for a wide range of projects, from smart home devices to wearable technology.

• Smart home automation (e.g., connected lights, thermostats)
• Wearable devices and fitness trackers
• Industrial IoT sensors and controllers
• Wireless data logging and monitoring
• Prototyping for IoT and embedded systems
• Low-power, battery-operated devices

The EWP32-S3 Supermini features a 14-pin layout. Below is the pinout and description:

1. Powering the Module:

   • Connect the 3V3 pin to a 3.3V power source.
   • Connect the GND pin to the ground of your circuit.

2. Programming the Module:

   • Use the UART pins (RXD and TXD) to upload code to the module.
   • Connect the EN pin to 3.3V to enable the module.
   • For boot mode, pull IO0 low during reset.

3. GPIO Usage:

   • The GPIO pins (IO0 to IO7) can be used for digital input/output, PWM, or other peripheral functions.
   • Ensure the pins are not overloaded beyond their current limits (12 mA per pin).

4. Wireless Communication:

   • Use the built-in Wi-Fi and Bluetooth capabilities for wireless data transfer.
   • Configure the wireless settings in your code (e.g., SSID, password for Wi-Fi).

• Voltage Levels: Ensure all connected devices operate at 3.3V logic levels to avoid damage.
• Power Supply: Use a stable power source to prevent unexpected resets or malfunctions.
• Antenna Placement: Avoid placing the module near metal objects or enclosures that may interfere with wireless signals.
• Deep Sleep Mode: Utilize the deep sleep mode for battery-powered applications to minimize power consumption.

Below is an example of how to connect and program the EWP32-S3 Supermini using the Arduino IDE:

#include <WiFi.h> // Include Wi-Fi library for ESP32-S3

// 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

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

  while (WiFi.status() != WL_CONNECTED) {
    delay(500); // Wait for connection
    Serial.print(".");
  }

  Serial.println("\nWi-Fi connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP()); // Print the device's IP address
}

void loop() {
  // Main loop does nothing in this example
}

1. Module Not Powering On:

   • Ensure the 3V3 pin is connected to a stable 3.3V power source.
   • Verify the EN pin is pulled high.

2. Unable to Upload Code:

   • Check the connections to the RXD and TXD pins.
   • Ensure the IO0 pin is pulled low during reset for boot mode.
   • Verify the correct COM port and board settings in the Arduino IDE.

3. Wi-Fi Not Connecting:

   • Double-check the SSID and password in your code.
   • Ensure the router is within range and supports 2.4 GHz Wi-Fi.

4. Unstable Operation:

   • Use a decoupling capacitor (e.g., 10 µF) near the power pins to stabilize the supply voltage.
   • Avoid exceeding the GPIO current limits.

Q: Can the EWP32-S3 Supermini operate at 5V?
A: No, the module operates at 3.3V. Connecting 5V may damage the module.

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

Q: Does the module support OTA updates?
A: Yes, the ESP32-S3 supports Over-The-Air (OTA) updates. You can implement this feature in your code.

Q: Can I use the module for Bluetooth audio?
A: The ESP32-S3 supports Bluetooth Low Energy (BLE) but is not optimized for high-quality audio streaming.

This concludes the documentation for the EWP32-S3 Supermini. For further assistance, refer to the official ACEIRMC datasheet or community forums.