The ESP32-S3 N16R8 is a Wi‑Fi/Bluetooth-capable microcontroller development board designed for running sketches (Arduino) or ESP-IDF applications. It provides UART serial connectivity via TX/RX and a large set of general-purpose digital I/O (GPIO) pins for interfacing with sensors, LEDs, and other electronics. Power is supplied through the board’s 3V3 and GND pins, with an RST pin available for reset.
| Pin | Signal | Description |
|---|---|---|
GND |
ground | top edge leftmost header hole |
TX |
TX | top edge header hole |
RX |
RX | top edge header hole |
1 |
digital | top edge header hole |
2 |
digital | top edge header hole |
42 |
digital | top edge header hole |
41 |
digital | top edge header hole |
40 |
digital | top edge header hole |
39 |
digital | top edge header hole |
38 |
digital | top edge header hole |
37 |
digital | top edge header hole |
36 |
digital | top edge header hole |
35 |
digital | top edge header hole |
45 |
digital | top edge header hole |
48 |
digital | top edge header hole |
47 |
digital | top edge header hole |
21 |
digital | top edge header hole |
20 |
digital | top edge header hole |
19 |
digital | top edge header hole |
GND.1 |
ground | top edge header hole |
GND.2 |
ground | top edge header hole |
3V3 |
power | bottom edge leftmost header hole |
3V3.1 |
power | bottom edge header hole |
RST |
digital | bottom edge header hole |
4 |
digital | bottom edge header hole |
5 |
digital | bottom edge header hole |
6 |
digital | bottom edge header hole |
7 |
digital | bottom edge header hole |
15 |
digital | bottom edge header hole |
16 |
digital | bottom edge header hole |
17 |
digital | bottom edge header hole |
18 |
digital | bottom edge header hole |
8 |
digital | bottom edge header hole |
3 |
digital | bottom edge header hole |
46 |
digital | bottom edge header hole |
9 |
digital | bottom edge header hole |
10 |
digital | bottom edge header hole |
11 |
digital | bottom edge header hole |
12 |
digital | bottom edge header hole |
13 |
digital | bottom edge header hole |
14 |
digital | bottom edge header hole |
5Vin |
power | bottom edge right-side power pin |
GND.4 |
ground | bottom edge rightmost header hole |
0 |
0 |
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