How to Use TinyS3[D] ESP32-S3: Examples, Pinouts, and Specs

The TinyS3[D] ESP32-S3 is a compact and powerful microcontroller board developed by Unexpected Maker. It is based on the ESP32-S3 chip, which features dual-core Xtensa LX7 processors, integrated Wi-Fi, and Bluetooth 5.0 LE capabilities. This board is designed for IoT (Internet of Things) applications, offering high performance, low power consumption, and a wide range of peripheral support. Its small form factor makes it ideal for space-constrained projects.

• IoT devices and smart home automation
• Wearable electronics
• Wireless sensor networks
• Robotics and automation
• Prototyping and development of Bluetooth and Wi-Fi-enabled devices
• Data logging and remote monitoring

Below are the key technical details of the TinyS3[D] ESP32-S3:

The TinyS3[D] ESP32-S3 features a total of 14 GPIO pins, which are multifunctional and can be configured for various purposes. Below is the pinout description:

1. Powering the Board:

   • Connect the TinyS3[D] to a USB-C cable for power and programming.
   • Alternatively, connect a 3.7V LiPo battery to the JST connector for portable applications.

2. Programming the Board:

   • Install the Arduino IDE or PlatformIO for development.
   • Add the ESP32 board support package to your IDE.
   • Select "ESP32-S3 Dev Module" as the board type in the IDE.
   • Connect the board to your computer via USB-C and upload your code.

3. Connecting Peripherals:

   • Use the GPIO pins to connect sensors, actuators, or other peripherals.
   • Configure the pins in your code for the desired functionality (e.g., digital input/output, I2C, SPI).

• Voltage Levels: Ensure all connected peripherals operate at 3.3V logic levels to avoid damaging the board.
• Power Supply: Use a stable 5V power source when powering the board via USB-C.
• Boot Mode: To enter bootloader mode, hold the BOOT button while pressing the RESET button.
• Pin Multiplexing: Be aware that some pins have multiple functions (e.g., GPIO, ADC, I2C). Configure them carefully in your code.

Below is an example of how to blink an LED connected to GPIO8:

// Define the GPIO pin for the LED
#define LED_PIN 8

void setup() {
  // Set the LED pin as an output
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  // Turn the LED on
  digitalWrite(LED_PIN, HIGH);
  delay(1000); // Wait for 1 second

  // Turn the LED off
  digitalWrite(LED_PIN, LOW);
  delay(1000); // Wait for 1 second
}

1. The board is not detected by the computer:

   • Ensure the USB-C cable is a data cable (not just a charging cable).
   • Check that the correct COM port is selected in the IDE.
   • Install the necessary USB drivers for the ESP32-S3.

2. Code upload fails:

   • Verify that the correct board type is selected in the IDE.
   • Enter bootloader mode by holding the BOOT button while pressing RESET.
   • Check for loose USB connections.

3. Wi-Fi or Bluetooth is not working:

   • Ensure the correct Wi-Fi credentials are entered in your code.
   • Check that the Bluetooth device is discoverable and within range.

4. The board overheats:

   • Avoid overloading the GPIO pins with excessive current.
   • Ensure proper ventilation if the board is used in an enclosed space.

Q: Can I power the TinyS3[D] with a battery?
A: Yes, you can use a 3.7V LiPo battery connected to the JST connector. The board includes a built-in LiPo charger.

Q: What is the maximum current output of the GPIO pins?
A: Each GPIO pin can source or sink up to 40 mA, but it is recommended to limit the current to 20 mA for safe operation.

Q: Does the TinyS3[D] support deep sleep mode?
A: Yes, the ESP32-S3 chip supports ultra-low power deep sleep mode for energy-efficient applications.

Q: Can I use the TinyS3[D] with MicroPython?
A: Yes, the TinyS3[D] is compatible with MicroPython. You can flash the MicroPython firmware to the board and use it for development.