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WiFiMaster

Phunkafizer·AllSerial·Mainboards/WiFi ESP32/Board S2/WiFiMaster.kicad_pcb

WiFiMaster PCB layout, top view — open source ESP32 board by Phunkafizer

About the WiFiMaster PCB

WiFiMaster is an open source ESP32 PCB design by Phunkafizer, published on GitHub under the MIT license. It is a 2-layer board measuring 67.4 × 54.3 mm, with 63 components from 37 distinct parts.

Its main chip is the ESP32-S3-MINI-1, from the ESP32 family. Other key parts include the MCP170X, NCP1117ST, ADuM142E1BRZ, IL0505 and TPS61041. By type, the board carries 21 capacitors, 17 resistors, 9 ICs, 4 LEDs, 3 diodes and 2 crystals.

It belongs with the usb & debug tools and iot & wireless designs in this gallery.

From the project

An universal sophisticated USB-serial converter

SEE PROJECTHOMEPAGE UNDER https://www.seegel-systeme.de/2025/07/10/allserial

Over the course of time I had to work with many different devices which had to be connected via a kind of serial interface. There are lots of different cheap USB-serial adapters available, but no adapter was including all features I needed in a single device. Every USB-serial adapter has in common the USB Controller. So I came up with the idea having a masterboard providing all the common features like USB interface, isolation and diagnostic elements. The most used interfaces (RS232, RS485, TTL UART, TTY current…

WiFiMaster, from the project README
From the project README

Main components on the WiFiMaster

MCP170XNCP1117STADuM142E1BRZIL0505TPS61041ESP32-S3-MINI-1

WiFiMaster bill of materials (BOM)

63 components, 37 distinct parts.

QtyPartRefs
1
MCP170X
IC1
2
NCP1117ST
IC2, IC7
3
ADuM142E1BRZ
IC3, IC4, IC5
1
IL0505
IC6
1
TPS61041
IC8
1
ESP32-S3-MINI-1
U1
1
~
M1
1
AKL18X-04W
X1
1
ALLSERIALMASTERM
X2
1
USB_C_Receptacle_USB2.0
J1
1
Conn_02x05_Odd_Even
J2
1
31-XX
S1
1
~
S2
1
red
LED1
1
green
LED2
1
yellow
LED3
1
blue
LED4
1
MBR0530
D1
1
1N4148WS
D2
1
USBLC6-2
D3
Show 17 more
QtyPartRefs
1
WE-CBF_0805
L3
1
10µ
L4
6
10µ
C1, C5, C8, C21, C22, C27
2
100µ
C2, C23
8
100n
C3, C9, C10, C11, C12, C18, C19, C20
2
1µ
C4, C7
1
10n
C6
1
4µ7
C24
1
22pF
C25
3
120
R1, R2, R3
5
10k
R4, R5, R6, R7, R8
3
33k
R9, R13, R18
1
22
R11
1
3k3
R12
1
1M
R14
2
5k1
R15, R16
1
300k
R19

WiFiMaster design files

The KiCad project lives in the Phunkafizer/AllSerial repository on GitHub; these links point at the commit this page was built from.

WiFiMaster: common questions

What microcontroller does the WiFiMaster use?

The WiFiMaster is built around the ESP32-S3-MINI-1, from the ESP32 family.

How big is the WiFiMaster PCB?

The WiFiMaster measures 67.4 × 54.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the WiFiMaster?

63 components, from 37 distinct parts. The full bill of materials is listed on this page.

Where can I download the WiFiMaster design files?

From the Phunkafizer/AllSerial repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the WiFiMaster design in my own project?

Yes, under the terms of its MIT license, which Phunkafizer chose for the repository.

Can I test firmware for the WiFiMaster without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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