Introducing the ProS3 - The Ultimate Pro ESP32-S3 Development Board
Introducing the ProS3 - The Ultimate Pro ESP32-S3 Development Board
LiPo battery input from the ProS3 board header, source-backed by the official Unexpected Maker ProS3 KiCad symbol.
Ground reference on the ProS3 board header.
5 V rail/header pin on the ProS3 board; product page also states USB-C with back-feed protection and 5V sense support.
3.3 V regulated rail/header pin on the ProS3 board.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface, commonly used as a boot/control GPIO on ESP32-S3 boards.
Secondary LDO output exposed by the ProS3 KiCad symbol.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
UART receive pin exposed on the ProS3 board header.
UART transmit pin exposed on the ProS3 board header.
Second ground reference pin on the ProS3 board header.
Reset input exposed on the ProS3 board header.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
ESP32-S3 GPIO exposed on the ProS3 castellated/header interface.
USB-C connector provides native USB and USB serial/JTAG per the Adafruit/Unexpected Maker product page.
STEMMA QT connector is present and powered by LDO1 per the official ProS3 product page.
LiPo battery charging connector on the ProS3 board per the official product page.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VBAT | 1 | power | LiPo battery input from the ProS3 board header, source-backed by the official Unexpected Maker ProS3 KiCad symbol. | |
| GND | 2 | ground | Ground reference on the ProS3 board header. | |
| 5V | 3 | power | 5 V rail/header pin on the ProS3 board; product page also states USB-C with back-feed protection and 5V sense support. | 5V |
| 3V3 | 4 | power | 3.3 V regulated rail/header pin on the ProS3 board. | 3.3V |
UART · I2C · 5V · 3.3V
Confirm the data interface matches your host board.
Module pins: VBAT, 5V, 3V3, LDO2_OUT, LiPo PicoBlade, GND, IO1, IO2. Schematik maps them to your board in the app.
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Boards · Microcontroller boards · 27 parts
| IO1 | 5 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO2 | 6 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO3 | 7 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO4 | 8 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO5 | 9 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO21 | 10 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO0 | 11 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface, commonly used as a boot/control GPIO on ESP32-S3 boards. |
| LDO2_OUT | 12 | power | Secondary LDO output exposed by the ProS3 KiCad symbol. |
| IO16 | 13 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO15 | 14 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO14 | 15 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO13 | 16 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO12 | 17 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO42 | 18 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO41 | 19 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO40 | 20 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO39 | 21 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO38 | 22 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| RX | 23 | uart | UART receive pin exposed on the ProS3 board header. |
| TX | 24 | uart | UART transmit pin exposed on the ProS3 board header. |
| GND | 25 | ground | Second ground reference pin on the ProS3 board header. |
| RST | 26 | control | Reset input exposed on the ProS3 board header. |
| IO6 | 27 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO7 | 28 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO8 | 29 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO9 | 30 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO34 | 31 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO36 | 32 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO37 | 33 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| IO35 | 34 | gpio | ESP32-S3 GPIO exposed on the ProS3 castellated/header interface. |
| USB-C | usb | USB-C connector provides native USB and USB serial/JTAG per the Adafruit/Unexpected Maker product page. |
| STEMMA QT | i2c | STEMMA QT connector is present and powered by LDO1 per the official ProS3 product page. |
| LiPo PicoBlade | power | LiPo battery charging connector on the ProS3 board per the official product page. |