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Kogger UART WiFi Bridge

koggertech·Kogger_UART_WiFi_Bridge·hardware/WiFi_UART_Bridge_v3.kicad_pcb

Kogger UART WiFi Bridge PCB layout, top view — open source ESP32 board by koggertech
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About the Kogger UART WiFi Bridge PCB

Kogger UART WiFi Bridge is an open source ESP32 PCB design by koggertech, published on GitHub under the MIT license. It is a 4-layer board measuring 20 × 30 mm, with 37 components from 16 distinct parts.

Its main chip is the ESP32-C3-MINI-1U, from the ESP32 family. Other key parts include the LMZM23601V3SILR. By type, the board carries 12 diodes, 11 resistors, 8 capacitors, 2 ICs, 2 crystals and 1 LED.

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

From the project

Open-source ESP32-C3 UART to Wi-Fi bridge: firmware (ESP-IDF), KiCad 10 board, datasheet. Two UART lines relayed to UDP/TCP as whole frames, station or AP with DHCP, control over Kogger SBP, OTA with rollback.

KiCad 10 project of the reference board, the board that was manufactured and is in use. Every drill hole and every solder‑paste opening of this board matches the fabrication files the board was made from (checked, see below).

The outputs are generated by python tools/makehwoutputs.py (needs kicad-cli of KiCad 10).

- Module U1: ESP32‑C3‑MINI‑1U with a U.FL connector for an external 2.4 GHz antenna. The EN pin has a 10 kΩ pull‑up and 1 µF to GND (power‑on delay). The strapping pins GPIO2, GPIO8 and GPIO9 have 10 kΩ pull‑ups. The BOOT button SB1 pulls GPIO9 low. - Power: - VCC arrives on X1…

Kogger UART WiFi Bridge, from the project README
From the project README

Main components on the Kogger UART WiFi Bridge

ESP32-C3-MINI-1ULMZM23601V3SILR

Kogger UART WiFi Bridge bill of materials (BOM)

37 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3-MINI-1U
Espressif Systems
U1
1
LMZM23601V3SILR
LMZM23601V3
Texas Instruments
U2
2
SM04B-GHS-TB(LF)(SN)
SM04B-GHS-TB
JST
X1, X2
1
PTS525SM15SMTR2 LFS
PTS525SM15SMTR2
C&K
SB1
1
FYLS-0603UGC
LED green
VD1
9
BAS3005B-02VH6327
BAS3005B-02V
Infineon Technologies
D1, D3, D4, D6, D7, D10, D11, D13 +1
2
SDM4A40EP3-7B
SDM4A40EP3
Diodes Incorporated
D8, D9
1
SZMMSZ5226BT1G
MMSZ5226B
onsemi
D12
2
CL10A106MO8NQNC
10uF
Samsung Electro-Mechanics
C1, C7
3
CL10B104JB8NNNC
0.1uF
Samsung Electro-Mechanics
C2, C4, C8
1
CL10A105KB8NNNC
1uF
Samsung Electro-Mechanics
C3
2
CL21A226MAYNNNE
22uF
Samsung Electro-Mechanics
C5, C6
4
ERJ-3EKF1002V
10k
Panasonic
R1, R3, R4, R5
3
ERJ-3EKF1001V
1k
Panasonic
R2, R10, R11
2
ERJ-3EKF1500V
150
Panasonic
R6, R7
2
ERJ-3GEY0R00V
0
Panasonic
R8, R9

Kogger UART WiFi Bridge design files

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

Kogger UART WiFi Bridge: common questions

What microcontroller does the Kogger UART WiFi Bridge use?

The Kogger UART WiFi Bridge is built around the ESP32-C3-MINI-1U, from the ESP32 family.

How big is the Kogger UART WiFi Bridge PCB?

The Kogger UART WiFi Bridge measures 20 × 30 mm, has 4 copper layers and is 1.2 mm thick.

How many components are on the Kogger UART WiFi Bridge?

37 components, from 16 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Kogger UART WiFi Bridge design files?

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

Can I use the Kogger UART WiFi Bridge design in my own project?

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

Can I test firmware for the Kogger UART WiFi Bridge 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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