devkit2

A compact ESP32-S3 development board designed for rapid prototyping and embedded projects.

Features

• ESP32-S3-WROOM-1 module — dual-core Xtensa LX7, 2.4 GHz Wi-Fi, BLE 5.0, 8 MB PSRAM, 16 MB Flash
• USB-C connector for power, programming, and serial monitor
• WS2812B addressable RGB LED on GPIO 2
• microSD card slot (TF-PUSH) connected via SPI
• 2× tactile push buttons — Boot (GPIO 0) and Reset (EN)
• 2× 20-pin breakout headers bringing out all available GPIO, power rails, and peripheral signals
• 3.3 V LDO regulator (TPS74533) — up to 500 mA output, 6.5 V max input
• Compact form factor — fits on a breadboard with one row of pins free on each side

Pin Map

                    ┌──────────────────┐
             3.3V —│ J1               │— GND
             EN   —│                  │— VIN (5 V)
            IO4   —│                  │— IO5
            IO6   —│                  │— IO7
            IO15  —│                  │— IO8
            IO16  —│                  │— IO9
            IO17  —│                  │— IO10
            IO18  —│                  │— IO11
            IO19  —│                  │— IO12
            IO20  —│                  │— IO13
            IO21  —│    ESP32-S3      │— IO14
            IO26  —│    devkit2       │— IO38
            IO35  —│                  │— IO39
            IO36  —│                  │— IO40
            IO37  —│                  │— IO41
            IO42  —│                  │— IO45
            IO43  —│                  │— IO46
            IO44  —│                  │— IO47
            GND   —│                  │— IO2  (onboard LED)
            5 V   —│                  │— IO0  (Boot button)
                   └──────────────────┘

Peripheral	GPIO	Notes
WS2812B LED	2	DIN, use NeoPixel lib
Boot button	0	Pull LOW to enter download mode
Reset button	EN	Pulls EN pin LOW
microSD CS	5	SPI chip select
microSD MOSI	11	SPI data
microSD MISO	13	SPI data
microSD SCK	12	SPI clock

Getting Started

1. Add Board Support

Install the esp32 board package by Espressif in the Arduino IDE:

1. Open File → Preferences
2. Add this URL to Additional Boards Manager URLs:

   https://espressif.github.io/arduino-esp32/package_esp32_index.json
   

3. Open Tools → Board → Boards Manager, search for esp32, and install esp32 by Espressif Systems

2. Select Board Settings

Setting	Value
Board	ESP32S3 Dev Module
USB CDC On Boot	Enabled
Flash Size	16 MB (128 Mb)
PSRAM	OPI PSRAM
Upload Mode	UART / Hardware CDC

3. Install Libraries

Install these libraries via Tools → Manage Libraries:

• Adafruit NeoPixel — for the onboard WS2812B LED
• SD (built-in, or SdFat) — for the microSD slot

4. Upload the Demo

Hold Boot (SW1), press and release Reset (SW2), then release Boot to enter download mode. Open CODE/demo/demo.ino in the Arduino IDE, select the correct port, and hit Upload.

Bill of Materials

Designator	Qty	Value	Footprint	LCSC #
U1	1	ESP32-S3-WROOM-1	WIRELM-SMD ESP32-S3-WROOM-1	C2913201
U2	1	TPS74533PCQWDRVRQ1	WSON-6 2.0×2.0 mm	C2860924
USB1	1	TYPE-C 16PIN 2MD	USB-C SMD 16-pin	C2765186
LED1	1	WS2812B-B/W	LED-SMD 5.0×5.0 mm	C2761795
CARD1	1	TF PUSH	TF-SMD push-push	C393941
J1, J2	2	PINHD 1×20 Male	PinHeader 1×20 2.54 mm	—
SW1, SW2	2	KMR221NGLFS	KEY-SMD 4.2×2.8 mm	C269272
R1, R2	2	RT0603BRE075K1L	0603 (1608 Metric)	C728607
R3, R4	2	RT0603BRE0710KL	0603 (1608 Metric)	C6277183

• R1, R2 = 5.1 kΩ thin-film — USB-C CC pull-downs
• R3, R4 = 10 kΩ thick-film — EN and BOOT pull-ups
• SW1 = Reset, SW2 = Boot
• All passives are 0603 imperial (1608 metric)

Hardware

Board files live in BOARD/. The project was designed in KiCad 8.

🔗 View schematic & PCB interactively on KiCanvas

Directory	Contents
BOARD/Board/	Schematic, PCB, project files
BOARD/Board/gbrs/	Gerber files (JLCPCB ready)
BOARD/Board/production/	BOM, CPL, netlist
BOARD/CAD/	3D STEP model

License

Hardware and software are released under the MIT License.

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Built by jacobjuneau6