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title: "ESP32-S3 Uno Development Board"
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<i>Explore new possibilities with ESP32-S3 UNO Development Board.</i>

<img src="assets/ESP32-Uno-assembled.jpg" width="35%"/>

[Schematic](schematic.md)

[Specs](specs.md)

## I2C Pins

The provided schematic excerpt below shows the wiring of SDA and SCL; __SDA__ is wired to the _GPIO 8_ and __SCL__ is wired to the _GPIO 9_ on the ESP32-S3 Module.

<img src="assets/ESP32-Uno-Board-Module-Pinout.png" width="50%"/>

The image of PCB board below shows the physical location of SDA and SCL terminals.
<img src="assets/ESP32-Uno-Board-GPIO.png" width="50%"/>

### Micropython LED Blinky Code

``` python
import esp, esp32, time, os, _thread
from machine import Pin, SoftI2C

# An infinite loop thread to blink LED
def status_led():
    # Blink pattern blink-blink-pause
    while True:
        led.value(1)
        time.sleep_ms(250)
        led.value(0)
        time.sleep_ms(250)
        led.value(1)
        time.sleep_ms(250)
        led.value(0)
        time.sleep_ms(750)

# Display information about ESP32S3 module
print(os.uname())
print("Flash size: ", esp.flash_size()/1024/1024, "Mb")
#rint("MCU Temperature: ", esp32.mcu_temperature(), "C")
print("MCU Temperature: {:4.1f} C".format(esp32.mcu_temperature()))

# Configure LED pin and start the blinky loop thread
led = Pin(45, Pin.OUT)
led.value(0)
_thread.start_new_thread(status_led, ())
```