Set it up once, and it runs for years. inki is the wireless epaper display that shows live information exactly where you need it. No cables, no maintenance — just insert batteries and configure via your browser.

One device, multiple applications — the same hardware runs them all. Available in compact 4.2” and large 7.5” sizes with 3D printable enclosures to fit your space.

Suitable for room booking, home automation monitoring, weather displays, and data visualization.

Key Benefits:

• Years of battery life — up to 10,000 refresh cycles on standard AA batteries
• Browser setup — configure via Wi-Fi hotspot, no programming required
• epaper display — content stays visible even when powered off
• Wireless updates — firmware and content updates over Wi-Fi
• Easy mounting — dovetail mount for quick installation and removal

Applications

Seatsurfing

Room booking and desk sharing display

REST API integration for live booking data

Historian

Time-series data visualization

CCU-Historian integration with trend analysis

Homematic

Home automation display

Live sensor data and device status monitoring

Weathermap

Real-time weather mapping

Free basemap.de WMS service from BKG (CC BY 4.0)

Build your own inki

Open source hardware and software

Complete package: PCB, firmware, and 3D printable enclosure

Engineering Facts

Specification	Value
Supply Current	~80mA (active), µA (sleep)
Battery Life	Up to 10,000 refresh cycles
Display	4.2” or 7.5” ePaper (4 gray scales)
Connectivity	Wi-Fi 802.11b/g/n (2.4GHz), TLS 1.2/1.3
MCU	Raspberry Pi Pico W (RP2040)
RTC	DS3231 with battery backup
Web Interface	Wi-Fi setup and OTA updates
Power	3x AA or 3x AAA batteries

Quick Setup (for kit builders)

Got your inki hardware ready? Here’s how to get started:

1. Download firmware
   • Get the latest UF2 from GitHub Releases
   • Choose: inki_historian.uf2, inki_seatsurfing.uf2, or inki_homematic.uf2
2. Flash to Pico W
   • Hold BOOTSEL button while connecting USB
   • Copy UF2 file to RPI-RP2 drive
   • Device restarts automatically
3. Configure via browser
   • Connect to WiFi “inki-setup” (password: 12345678)
   • Open http://192.168.4.1 in browser
   • Set your WiFi, ePaper model, and application settings

Note: Works as web preview with just Pico W. Add DS3231 + ePaper for full automation.

Questions? Ideas? Interested in a kit?
Contact: c0de@posteo.de