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Milight hub

usimd·milight-hub

Milight hub PCB layout, top view — open source ESP32 board by usimd

About the Milight hub PCB

Milight hub is an open source ESP32 PCB design by usimd, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 30.2 × 19.8 mm, with 22 components from 15 distinct parts.

Its main chip is the ESP32-C3-WROOM-02, from the ESP32 family. Other key parts include the NRF24L01_Breakout and LM2841X. By type, the board carries 10 capacitors, 5 resistors, 3 ICs, 1 connector, 1 switch and 1 diode.

It belongs with the iot & wireless designs in this gallery.

From the project

Custom PCB to run Milight Hub for integrating Milight hardware into Homeassistant

Compact ESP32-C3 and nRF24L01+ based hardware for running a MiLight hub.

This repository contains a KiCad hardware design for a small standalone MiLight bridge board.

- ESP32-C3-WROOM-02 - an nRF24L01+ compatible radio module (castellated SMD version) - an on-board buck regulator for 3.3 V - a Molex PicoBlade power input (because it's tiny and I had it in stock) - a pogo-pad programming header for external flashing

Milight hub, from the project README
From the project README

Main components on the Milight hub

ESP32-C3-WROOM-02NRF24L01_BreakoutLM2841X

Milight hub bill of materials (BOM)

22 components, 15 distinct parts.

QtyPartRefs
1
ESP32-C3-WROOM-02
U1
1
NRF24L01_Breakout
U2
1
LM2841X
U3
1
Conn_01x02
J1
1
SW_Push
SW1
1
B5819W
D1
1
15u
L1
2
10u
C1, C4
3
0.1u
C2, C5, C7
1
1u
C3
2
10u 50V
C6, C8
2
47uF 10V
C9, C10
3
10k
R1, R2, R5
1
1.2k
R3
1
3.9k
R4

Milight hub design files

The KiCad project lives in the usimd/milight-hub repository on GitHub; these links point at the commit this page was built from.

Milight hub: common questions

What microcontroller does the Milight hub use?

The Milight hub is built around the ESP32-C3-WROOM-02, from the ESP32 family.

How big is the Milight hub PCB?

The Milight hub measures 30.2 × 19.8 mm, has 2 copper layers and is 1.579 mm thick.

How many components are on the Milight hub?

22 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the Milight hub design files?

From the usimd/milight-hub repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Milight hub design in my own project?

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

Can I test firmware for the Milight hub 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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