4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers52.6 × 88.6 mm
Occupancy indicator
m1cha3l-s/remote-occupancy-indicatorESP32 based occupancy marker for meeting rooms, office cubicles and etc. and a simple remote for it.
- Size
- 52.6 × 88.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 33
- Nets
- 48
- Pads
- 218
- Tracks, vias
- 263, 45
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Mar 2026
- Updated
- 21 Apr 2026
Overview
Occupancy indicator is an open-source printed circuit board by m1cha3l-s, from the m1cha3l-s/remote-occupancy-indicator repository on GitHub. It is a 2-layer board of 52.6 × 88.6 mm with 33 parts on 48 nets, routed with 263 tracks and 45 vias.
It is built around the SK6812MINI-E. Its parts include 16 diodes, 3 switches and 2 ICs.
Main components
1README
README.mdRemote occupancy indicator
ESP32 based occupancy marker for meeting rooms, office cubicles and etc. and a simple remote for it. ESP-NOW is used for communication between the the boards, which are using the ESP32-C3 Super Mini
Assembling
- Print the both the Indicator and Remote top and bottom parts in a filament of your choice
- Print the LED part of the Indicator and Remote case in a transparent filament or white filament (not tested) so that the leds can shine through it.
- Use super glue to put the LED Parts in place (on the inside) if they already don't hold in place, even if they do the super glue wouldn't hurt.
- The top and bottom of both cases snap together, after you snap them together you can move one the Setup!
- For mounting use command strips or heavy duty double sided tape!!
Setup
- Select the ESP32 Super Mini in Arduino IDE
- Flash the MAC-Finder to both the boards and write down the MAC Address which will be sent in the Serial Monitor
- In the indicator firmware file change the broadcast MAC address to the one the remote gave you
- Flash!
- Now in the remote firmware file change the broadcast MAC address to the one the indicator gave you
- Flash!
- Now the Indicator and Remote will connect to each other automatically
Looks
PCB/Schematic
BOM
| Part Name | Quantity | Price (USD) | Total (USD) | Link |
|---|---|---|---|---|
| ESP32-C3 Super Mini | 2 | 3.16 | 6.32 | https://www.aliexpress.com/item/1005005834458965.html |
| 20pcs SK6812MINI-E | 1 | 1.75 | 1.75 | https://www.aliexpress.com/item/1005008308801366.html |
| 20PCS Tact Push Button Switch 12V Copper 4Pin SMD Micro Switch 6X6X5mm | 1 | 1.62 | 1.62 | https://www.aliexpress.com/item/1005005834458965.html |
| Aliexpress shipping | 1 | 2.55 | 2.55 | |
| Custom PCB (with shipping) | 1 | 4.24 | 4.24 | jlcpcb |
| 3D Printed case | 1 | 0 | 0 | none - I have my own printer |
| Total | 16.48 |
Parts
33| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | SK6812MINI-E | footprints:SK6812MINI-E_fixed | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW1, SW2, SW3 |
| 2 | ~ | EasyEDA_Lib:COMM-SMD_16P-L22.5-W18.0-P2.54-TL | U1, U2 |
| 1 | LOGO | LOGO | G*** |
The 22 most common of 33 parts.
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Questions
How big is the Occupancy indicator PCB?
It measures 52.6 × 88.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Occupancy indicator use?
33 parts, built around the SK6812MINI-E. 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 Occupancy indicator KiCad files?
From the m1cha3l-s/remote-occupancy-indicator repository on GitHub, at the commit this page was made from: the board is PCB:Schematic/Occupancy indicator.kicad_pcb and its schematic PCB:Schematic/Occupancy indicator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Occupancy indicator design in my own project?
Its repository states no licence, so its author keeps all rights: ask m1cha3l-s before reusing the design.