How to Use ESP32-S3 WROOM N16R8 FREENOVE: Examples, Pinouts, and Specs

The ESP32-S3 WROOM N16R8 FREENOVE is a powerful microcontroller module designed for Internet of Things (IoT) applications. Manufactured by FREENOVE, this module features dual-core processing, integrated Wi-Fi and Bluetooth 5.0 capabilities, and 16MB of flash memory. It is ideal for projects requiring high performance, low power consumption, and robust wireless connectivity. The ESP32-S3 WROOM N16R8 also supports a wide range of peripherals, making it versatile for various applications.

• Smart home devices (e.g., smart lights, thermostats)
• Wearable technology
• Industrial IoT systems
• Wireless sensor networks
• Robotics and automation
• Edge computing and AI/ML applications

The ESP32-S3 WROOM N16R8 is packed with features that make it suitable for demanding IoT projects. Below are its key technical specifications:

The ESP32-S3 WROOM N16R8 module has multiple GPIO pins and interfaces. Below is a summary of the pin configuration:

Note: The ESP32-S3 WROOM N16R8 supports additional pins and interfaces, such as SPI, I2C, and ADC. Refer to the full datasheet for a complete pinout.

1. Power Supply: Connect the 3V3 pin to a 3.3V power source and GND to ground.
2. Boot Mode: To upload code, connect GPIO0 to GND during reset to enter bootloader mode.
3. Peripherals: Use the GPIO pins to connect sensors, actuators, or other peripherals. Ensure the voltage levels are compatible.
4. Programming: The module can be programmed using the Arduino IDE, PlatformIO, or ESP-IDF.

The ESP32-S3 WROOM N16R8 can communicate with an Arduino UNO via UART. Below is an example of how to send data from the Arduino to the ESP32-S3.

// Example: Sending data from Arduino UNO to ESP32-S3 via UART
void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud
}

void loop() {
  Serial.println("Hello from Arduino!"); // Send data to ESP32-S3
  delay(1000); // Wait for 1 second
}

// Example: Receiving data on ESP32-S3 from Arduino UNO
void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud
}

void loop() {
  if (Serial.available()) { // Check if data is available
    String data = Serial.readString(); // Read the incoming data
    Serial.println("Received: " + data); // Print the received data
  }
}

• Power Supply: Ensure a stable 3.3V power source to avoid damage to the module.
• GPIO Voltage Levels: The GPIO pins are not 5V tolerant. Use level shifters if interfacing with 5V devices.
• Antenna Placement: For optimal Wi-Fi and Bluetooth performance, avoid placing the module near metal objects or inside enclosures that block RF signals.
• Firmware Updates: Keep the firmware updated to benefit from the latest features and security patches.

1. Module Not Responding

   • Cause: Incorrect power supply or wiring.
   • Solution: Verify the power supply is 3.3V and check all connections.

2. Cannot Upload Code

   • Cause: GPIO0 not connected to GND during reset.
   • Solution: Ensure GPIO0 is grounded when resetting the module to enter bootloader mode.

3. Wi-Fi Connection Fails

   • Cause: Incorrect SSID or password.
   • Solution: Double-check the Wi-Fi credentials in your code.

4. Bluetooth Not Discoverable

   • Cause: Bluetooth not initialized in the code.
   • Solution: Ensure the Bluetooth stack is properly configured in your firmware.

Q: Can the ESP32-S3 WROOM N16R8 operate on 5V?
A: No, the module operates at 3.3V. Use a voltage regulator or level shifter for 5V systems.

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

Q: Is the module compatible with ESP-IDF?
A: Yes, the ESP32-S3 WROOM N16R8 is fully supported by the ESP-IDF development framework.

Q: Can I use the module for AI/ML applications?
A: Yes, the ESP32-S3 supports AI/ML workloads, including TensorFlow Lite Micro.

By following this documentation, you can effectively integrate the ESP32-S3 WROOM N16R8 FREENOVE into your IoT projects.