2 layers27.9 × 16.5 mm
2 layers100.3 × 61.6 mm
Pi485
DanNixon/pi485Simple module for interfacing RS485 devices with an Ethernet network.
- Size
- 100.3 × 61.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 44
- Pads
- 116
- Tracks, vias
- 117, 3
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Jul 2025
- Updated
- 1 Apr 2026
Overview
Pi485 is an open-source printed circuit board by DanNixon, from the DanNixon/pi485 repository on GitHub, published under the MIT licence. It is a 2-layer board of 100.3 × 61.6 mm with 18 parts on 44 nets, routed with 117 tracks and 3 vias.
Its parts include 6 ICs, 4 connectors, 3 switches and 1 diode. It belongs with the interfaces and adapters boards and the RP2040 boards of this library.
README
README.mdpi485
Simple module for interfacing RS485 devices with an Ethernet network.
Features
- Two RS485-UART interfaces
- Ethernet (either WIZ550io or W5500-EVB-Pico)
- SD card
- 5V regulator
- Display and buttons
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3 |
| 2 | Conn_01x02 | Connectors:ED5552DS | J3, J4 |
| 2 | Conn_01x03 | Connectors:CTB7000-3 | J1, J2 |
| 2 | RS485 to TTL module | Modules:RS485_to_ttl | U1, U2 |
| 1 | 5V | Modules:AliE_MP1584EN_regulator | U6 |
| 1 | D_Schottky | Diode_SMD:D_SOD-123 | D1 |
| 1 | GMT130 Display Module | Displays:GMT130 | U3 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_THT | A1 |
| 1 | WIZ550io | Modules:WIZ550io | U4 |
| 1 | uSD Card Module | Modules:uSD_Card | U5 |
Questions
How big is the Pi485 PCB?
It measures 100.3 × 61.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pi485 use?
18 parts. 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 Pi485 KiCad files?
From the DanNixon/pi485 repository on GitHub, at the commit this page was made from: the board is pcb/pi485.kicad_pcb and its schematic pcb/pi485.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pi485 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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