6 layers75 × 78.4 mm
Poe backplate
dotstartech/wall-panel
Wall mounted 4 inch touch display panel with CM4 inside
125 parts445
4 layers78 × 40 mm
Add on template
dotstartech/wall-panel445Wall mounted 4 inch touch display panel with CM4 inside
- Size
- 78 × 40 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 4
- Nets
- 40
- Pads
- 62
- Tracks, vias
- 83, 46
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Jan 2026
- Updated
- 24 Aug 2026
Overview
Add on template is an open-source printed circuit board by dotstartech, from the dotstartech/wall-panel repository on GitHub. It is a 4-layer board of 78 × 40 mm with 4 parts on 40 nets, routed with 83 tracks and 46 vias.
It is built around the PZ254-2-20-WS. It belongs with the computers and single-board computers and lEDs and displays boards of this library.
Main components
1README
README.mdWall Panel
Wall Panel is a 4-inch wall-mounted touch display panel powered by Raspberry Pi Compute Module 4 (CM4). It features a 720x720 IPS multitouch display and can be used as a Home Assistant dashboard or any other embedded display application.
Display
We use this display, but touch variant. It is 4 lane MIPI with i2c touch controller.
- Display driver: ST7703
- Touch driver: FT6336U
Possible use cases
- Home Assistant Dashboard. Perfect for wall-mounted smart home control panels with full touch interaction and high-resolution display.
- Information Display. Show weather, calendar, news, or any other dynamic content in your home or office.
- Control Panel. Use as a centralized control interface for IoT devices, lighting, or home automation systems.
- Embedded Display. Build custom applications using the full power of Raspberry Pi OS or any Linux distribution on the CM4.
List of features
- 720x720 IPS Display with multitouch support
- Raspberry Pi Compute Module 4 as the main brain
- External RTC for accurate timekeeping
- USB-C for data and power
- USB-OTG support for device mode
- Action Button for user interaction
- WiFi connectivity
- 40-pin GPIO Header for Raspberry Pi compatibility
- SD Card slot for storage expansion
- Micro HDMI output for external displays
- EEPROM Flashing capability for firmware updates
- Backplane Connector for power and data from the wall and future PoE backplate support
Parts
4| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | Left, i2c | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | Mic Adafruit | Adafruit_SPH0645LM4H:SPH0645LM4H | J5 |
| 1 | PZ254-2-20-WS | PM254-2-20-WS:PM254-2-20-WS-8.5 | J10 |
| 1 | Right, 3v | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J2 |
Questions
How big is the Add on template PCB?
It measures 78 × 40 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Add on template use?
4 parts, built around the PZ254-2-20-WS. 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 Add on template KiCad files?
From the dotstartech/wall-panel repository on GitHub, at the commit this page was made from: the board is pcb/add-on-template/add-on-template.kicad_pcb and its schematic pcb/add-on-nfc/add-on-nfc.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Add on template design in my own project?
Its repository states no licence, so its author keeps all rights: ask dotstartech before reusing the design.
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