HardLabs

RoomIO 001

jirihusak·majordomus·HW/RoomIO/PCB/RoomIO_001.kicad_pcb

RoomIO 001 PCB layout, top view — open source PIC board by jirihusak

About the RoomIO 001 PCB

RoomIO 001 is an open source PIC PCB design by jirihusak, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 58.2 × 63.9 mm, with 80 components from 34 distinct parts.

Its main chip is the PIC18F57K42, from the PIC family. Other key parts include the R-78E5-0.5, TLV70233DBVR, IX4427N, LM358 and LTV-247. By type, the board carries 32 resistors, 21 capacitors, 11 ICs, 6 connectors, 6 diodes and 1 crystal.

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

From the project

Open source system for smart home

Majordomus is a modular automation system built on open standards. It fills the gap between closed, expensive commercial solutions and unreliable consumer-grade components — designed to be repairable, expandable, and to last for decades.

- 🧩 Modular hardware — base unit + interchangeable modules ( I/O, sensors) - 🔌 Standardized interface — RS-485 / ModBus HW interface, MQTT SW interface - 🔓 Vendor lock-in free — open hardware, open software, your choice - 🧠 Node-RED inside — visual programming for automation flows - 🧠 Home Assistant interface — MQTT integration for popular platform - 📡…

RoomIO 001, from the project README
From the project README

Main components on the RoomIO 001

PIC18F57K42R-78E5-0.5TLV70233DBVRIX4427NLM358LTV-247SN75176BDR

RoomIO 001 bill of materials (BOM)

80 components, 34 distinct parts.

QtyPartRefs
1
PIC18F57K42
U1
1
R-78E5-0.5
U2
1
TLV70233DBVR
U3
4
IX4427N
U4, U5, U7, U8
1
LM358
U6
2
LTV-247
U9, U10
1
SN75176BDR
U11
1
Crystal_GND24
Y1
1
CONN_DEBUG
J1
1
Conn_01x04
J2
1
Conn_02x03_Odd_Even
J3
2
Conn_01x10
J4, J6
1
Conn_01x06
J5
1
ECE SL075-33
TH1
1
MF-MSMF050-2
TH2
1
LED
D1
1
SMAJ28
D2
2
MMSZ4684-E3-08
D3, D4
1
BAS70
D5
1
D_TVS_x2_AAC
D6
Show 14 more
QtyPartRefs
1
3.9 uH
L1
7
100nF
C1, C5, C6, C16, C17, C19, C20
2
18pF
C2, C3
10
1uF
C4, C7, C9, C11, C12, C13, C14, C15 +2
2
10uF
C8, C10
7
10k
R1, R8, R11, R12, R18, R19, R20
1
100R
R2
4
4k7
R3, R4, R5, R6
9
1k5
R7, R22, R23, R24, R25, R26, R27, R28 +1
4
1k
R9, R10, R13, R21
2
6k8
R14, R15
2
3k3
R16, R17
2
10R
R30, R31
1
120R
R32

RoomIO 001 design files

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

RoomIO 001: common questions

What microcontroller does the RoomIO 001 use?

The RoomIO 001 is built around the PIC18F57K42, from the PIC family.

How big is the RoomIO 001 PCB?

The RoomIO 001 measures 58.2 × 63.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RoomIO 001?

80 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the RoomIO 001 design files?

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

Can I use the RoomIO 001 design in my own project?

Yes, under the terms of its GPL-3.0 license, which jirihusak chose for the repository.

Can I test firmware for the RoomIO 001 without the hardware?

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

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