HardLabs

LAN-Module

jorticus·esp32-poe-dev

LAN-Module layout, top view — open source ESP32 board by jorticus
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About the LAN-Module

LAN-Module is an open source ESP32 PCB design by jorticus, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 28.6 × 53.3 mm, with 89 components from 38 distinct parts.

Its main chip is the ESP32-U4WDH, from the ESP32 family. Other key parts include the W25Q32, LV2842XLVDDCR, RTL8201F and CP2102N-Axx-xQFN24. By type, the board carries 28 connectors, 24 resistors, 22 capacitors, 5 ICs, 3 inductors and 2 transistors.

It belongs with the dev boards & breakouts and iot & wireless designs in this gallery.

From the project

Compact ESP32 PoE dev board

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

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

LAN-Module, from the project README
From the project README

Main components on the LAN-Module

ESP32-U4WDHW25Q32LV2842XLVDDCRRTL8201FCP2102N-Axx-xQFN24

LAN-Module bill of materials (BOM)

89 components, 38 distinct parts.

QtyPartRefs
1
ESP32-U4WDH
U1
1
W25Q32
U2
1
LV2842XLVDDCR
U3
1
RTL8201F
U4
1
CP2102N-Axx-xQFN24
U5
2
2N7002
Q1, Q2
1
40MHz ±10ppm
Y1
1
USB_B_Micro
J1
1
HR911105A
J2
26
ProtoCastellatedHeader
J3, J4, J5, J6, J7, J8, J9, J10 +18
1
1A
F1
1
RESET
SW1
1
PMEG6020ER,115
D1
1
?
D2
2
FB 600R@100MHz 1.3A
L1, L3
1
10uH 1A
L2
12
100n
C2, C3, C7, C8, C9, C19, C20, C22 +4
1
10u
C5
2
1u
C10, C11
2
22p
C12, C13
Show 18 more
QtyPartRefs
1
4.7u
C14
1
3.3n
C15
1
10n
C16
1
2.2u
C18
1
4.7u
C21
7
10k
R1, R5, R9, R10, R11, R12, R21
1
2k
R2
1
20K
R3
2
499R
R4, R22
1
33k 1%
R6
1
10k 1%
R7
1
2.49k 1%
R8
1
50R 1%
R13
3
49.9R 1%
R14, R17, R18
2
240R
R15, R16
1
22k
R19
1
47k
R20
2
0R
R23, R24

LAN-Module design files

The KiCad project lives in the jorticus/esp32-poe-dev repository on GitHub; these links point at the commit this page was built from.

LAN-Module: common questions

What microcontroller does the LAN-Module use?

The LAN-Module is built around the ESP32-U4WDH, from the ESP32 family.

How big is the LAN-Module?

The LAN-Module measures 28.6 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LAN-Module?

89 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the LAN-Module design files?

From the jorticus/esp32-poe-dev repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

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

Yes, under the terms of its CERN-OHL-S-2.0 license, which jorticus chose for the repository.

Can I test firmware for the LAN-Module 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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