PCB Layout

The ESP32-S3-DevKitC-1 is a two-layer PCB designed for manufacturing simplicity while maintaining good RF performance.

Board Dimensions

Parameter	Value
Length	62.74 mm
Width	25.40 mm (at module)
Thickness	1.6 mm (standard)
Header Pitch	2.54 mm

PCB Overview

Top Layer

The top layer includes:

ESP32-S3-WROOM-1 module
USB connectors (J2, J4)
CP2102N USB-UART bridge
Power regulation (U2 LDO)
User buttons (RST, BOOT)
RGB LED (D6)
Header pins (J1, J3)

Key Layout Considerations

Module Placement: The WROOM module is centered with its antenna extending beyond the board edge
USB Ports: Placed at opposite ends for cable clearance
Buttons: Accessible from board edge
LED: Near GPIO header for visual status

Bottom Layer

The bottom layer contains:

Ground plane (majority of area)
Power traces
Signal routing between headers and module

Pin Legend

Pin Layout

Left Header (J1) - 22 Pins

From USB side down:

3V3  ─ ●  1
3V3  ─ ●  2
RST  ─ ●  3
4    ─ ●  4
5    ─ ●  5
6    ─ ●  6
7    ─ ●  7
15   ─ ●  8
16   ─ ●  9
17   ─ ●  10
18   ─ ●  11
8    ─ ●  12
3    ─ ●  13
46   ─ ●  14
9    ─ ●  15
10   ─ ●  16
11   ─ ●  17
12   ─ ●  18
13   ─ ●  19
14   ─ ●  20
5V   ─ ●  21
G    ─ ●  22

Right Header (J3) - 22 Pins

From USB side down:

G    ─ ●  1
TX   ─ ●  2
RX   ─ ●  3
1    ─ ●  4
2    ─ ●  5
42   ─ ●  6
41   ─ ●  7
40   ─ ●  8
39   ─ ●  9
38   ─ ●  10   (RGB LED - V1.1)
37   ─ ●  11   (PSRAM)
36   ─ ●  12   (PSRAM)
35   ─ ●  13   (PSRAM)
0    ─ ●  14   (Boot)
45   ─ ●  15
48   ─ ●  16   (RGB LED - V1.0)
47   ─ ●  17
21   ─ ●  18
20   ─ ●  19   (USB D+)
19   ─ ●  20   (USB D-)
G    ─ ●  21
G    ─ ●  22

Component Placement

Active Components

Ref	Component	Location
U2	SGM2212 LDO	Near 5V input
U3	CP2102N	Center, between USB ports
U4	ESP32-S3-WROOM-1	Top center
Q1, Q2	L8050QLT1G	Near CP2102N
D6	SK68XXMINI-HS	Right edge

Passive Placement

Decoupling capacitors placed close to IC power pins
USB resistors near USB connectors
Pull-up/down resistors near associated GPIO

Antenna Considerations

The PCB antenna is located at the top edge of the WROOM module:

Best Practices

Orient module so antenna faces away from noise sources
Keep antenna edge at enclosure opening if used
Avoid placing near metal objects or human body contact areas

Mounting

Header Options

Option	Use Case
Male headers (default)	Breadboard insertion
Female headers	Stacking, jumper wires
No headers	Custom integration

Mounting Holes

The board does not include mounting holes. For enclosure mounting:

Use header pins for mechanical support
Consider 3D-printed brackets
Use adhesive standoffs

Design Files

For custom designs or manufacturing:

Schematic: SCH_ESP32-S3-DevKitC-1_V1.1_20221130.pdf
PCB Layout: PCB_ESP32-S3-DevKitC-1_V1.1_20220429.pdf
Dimensions: DXF_ESP32-S3-DevKitC-1_V1.1_20220429.dxf

Breadboard Compatibility

The DevKitC-1 fits standard breadboards:

2.54mm header pitch matches breadboard
Board width spans the center gap
All pins accessible on both sides