2 layers28.6 × 53.3 mm LAN Module, the printed circuit board in 3D

LAN Module

Compact ESP32 PoE dev board

Size: 28.6 × 53.3 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 90
Nets: 97
Pads: 381
Tracks, vias: 1,057, 88
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 28 Feb 2025
Updated: 16 Mar 2025

Overview

LAN Module is an open-source printed circuit board by jorticus, from the jorticus/esp32-poe-dev repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 28.6 × 53.3 mm with 90 parts on 97 nets, routed with 1,057 tracks and 88 vias.

It is built around the ESP32-U4WDH, LV2842XLVDDCR-JSM and HR911105A, with the PMEG6020ER,115-JSM among its other parts. Its parts include 28 connectors, 24 resistors, 22 capacitors, 5 ICs and 3 inductors. It belongs with the ESP32 boards of this library.

Main components

README

README.md

ESP32 PoE Dev Board

A simple ESP32 ethernet + PoE dev board

PoE Dev Board

WARNING: PoE is NOT ISOLATED! Be careful what you attach.

See jared.geek.nz/esp32-poe-devboard for the story.

Usage

ESPHome

yaml

esp32:
  board: esp32dev

ethernet:
  type:     RTL8201
  mdc_pin:  GPIO23
  mdio_pin: GPIO18
  clk_mode: GPIO0_OUT
  phy_addr: 0

...

Arduino

main.cpp

cpp

void setup() {
    // WiFi antenna not available on this board
    WiFi.mode(WIFI_OFF); 

    ETH.begin();
    ETH.config();
}

platformio.ini

ini

[platformio]

[env:esp32_poe]
platform  = espressif32
framework = arduino
board     = esp32_dev
build_flags = 
    -DETH_PHY_ADDR=0
    -DETH_PHY_MDC=23
    -DETH_PHY_MDIO=18
    -DETH_PHY_TYPE=ETH_PHY_RTL8201
    -DETH_CLK_MODE=ETH_CLOCK_GPIO0_OUT

Parts

Qty	Value	Footprint	References
26	ProtoCastellatedHeader	Visclib:ProtoCastellatedHeader_65mil	J10, J11, J12, J13, J14, J15, J16, J17, J18, J19, J20, J21, J22, J23, J24, J25 +10
12	100n	Capacitor_SMD:C_0603_1608Metric	C2, C3, C7, C8, C9, C19, C20, C22, C23, C24, C25, C26
6	10k	Resistor_SMD:R_0603_1608Metric	R1, R9, R10, R11, R12, R21
3	49.9R 1%	Resistor_SMD:R_0603_1608Metric	R14, R17, R18
2	0R	Resistor_SMD:R_0603_1608Metric	R23, R24
2	1u	Capacitor_SMD:C_0603_1608Metric	C10, C11
2	22p	Capacitor_SMD:C_0603_1608Metric	C12, C13
2	240R	Resistor_SMD:R_0603_1608Metric	R15, R16
2	2N7002	Package_TO_SOT_SMD:SOT-23	Q1, Q2
2	499R	Resistor_SMD:R_0603_1608Metric	R4, R22
2	FB 600R@100MHz 1.3A	Resistor_SMD:R_0603_1608Metric	L1, L3
1	10K	Resistor_SMD:R_0603_1608Metric	R5
1	10k 1%	Resistor_SMD:R_0603_1608Metric	R7
1	10n	Capacitor_SMD:C_0603_1608Metric	C16
1	10u	Capacitor_SMD:C_0603_1608Metric	C5
1	10uH 1A	Inductor_SMD:L_Taiyo-Yuden_NR-40xx	L2
1	1A	Fuse:Fuse_1206_3216Metric	F1
1	2.2u	Capacitor_SMD:C_0603_1608Metric	C18
1	2.49k 1%	Resistor_SMD:R_0603_1608Metric	R8
1	20K	Resistor_SMD:R_0603_1608Metric	R3
1	22k	Resistor_SMD:R_0603_1608Metric	R19
1	2k	Resistor_SMD:R_0603_1608Metric	R2
1	3.3n	Capacitor_SMD:C_0603_1608Metric	C15
1	33k 1%	Resistor_SMD:R_0603_1608Metric	R6
1	4.7u	Capacitor_SMD:C_Elec_3x5.4	C21
1	4.7u	Capacitor_SMD:C_0603_1608Metric	C14
1	40MHz ±10ppm	Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	47k	Resistor_SMD:R_0603_1608Metric	R20
1	50R 1%	Resistor_SMD:R_0603_1608Metric	R13
1	?	Diode_SMD:D_SOD-123	D2
1	CP2102N-Axx-xQFN24	Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm	U5
1	ESP32-U4WDH	Visclib:ESP32-REDUCED	U1
1	HR911105A	Visclib:RJ45_Hanrun_HR911105A_Horizontal	J2
1	LV2842XLVDDCR	Package_TO_SOT_SMD:SOT-23-6	U3
1	Logo	Visclib:wolfpaw-0.3	LOGO1
1	PMEG6020ER,115	Diode_SMD:D_SOD-123	D1
1	RESET	Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK	SW1
1	RTL8201F	Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.1x3.1mm	U4
1	USB_B_Micro	Connector_USB:USB_Micro-B_Molex_47346-0001	J1
1	W25Q32	Package_SO:SOIC-8_5.23x5.23mm_P1.27mm	U2

Questions

How big is the LAN Module PCB?

It measures 28.6 × 53.3 mm and has 2 copper layers, 1.6 mm thick.

What parts does the LAN Module use?

90 parts, built around the ESP32-U4WDH, LV2842XLVDDCR-JSM, HR911105A and PMEG6020ER,115-JSM. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the LAN Module KiCad files?

From the jorticus/esp32-poe-dev repository on GitHub, at the commit this page was made from: the board is LAN-Module.kicad_pcb and its schematic LAN-Module-1P.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the LAN Module design in my own project?

Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

ESP32

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/jorticus-esp32-poe-dev-lan-module" title="LAN Module in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/jorticus-esp32-poe-dev-lan-module.jpg" alt="LAN Module" width="1200" height="900">

A picture that opens the board, for a README

[![LAN Module](https://pcbkit.io/embed/boards/jorticus-esp32-poe-dev-lan-module.jpg?size=s)](https://pcbkit.io/boards/jorticus-esp32-poe-dev-lan-module)

Source

Repository: jorticus/esp32-poe-dev
Board file: LAN-Module.kicad_pcb
Commit: 093c4ad
Licence: CERN-OHL-S-2.0

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