Siebenschläfer™E-Paper Wall Display
- Solar cells for power supply - even indoors
- Data via radio - with extra long range
- Longevity as a goal
- Hang it up once, never worry again
- 100% maintenance-free
Powered by Ambiance
Say goodbye to charging cables. The Siebenschläfer™ draws its power from ambient room light. Its 2 cm wide solar frame captures even diffuse indoor lighting (as low as 300 lux). With the optional Extension-Panel, darker environments are also possible – any number of them can be chained together.
Built to last
A constant in a fast-paced worldEnergy is stored not in aging batteries, but in long-lasting supercapacitors. Result: over 20 years of maintenance-free operation. Anti-glare glass protects the delicate e-paper panel and filters UV radiation. The Siebenschläfer™ can safely be stored without charge for years.More than just black and white
From opening hours to smart home controls, tourist information, or digital art: the 7-inch e-paper screen renders every detail in color. Smart dithering brings photos to life, while special anti-reflective glass ensures a clear view without glare.Hidden control
A floating mount allows triggering a button with haptic feedback by gentle tilting, with which any automations can be triggered via WebHook. Perfect for controlling actions in the smart home.
Open for Makers
We have nothing to hide. Our schematics and firmware source code are fully open - a valuable resource for anyone interested in learning how to achieve an ultra-low standby current of just 20 µA.
Simple Layout Designer
Design your display content effortlessly with our intuitive online editor. Use templates or get creative - no coding required. For advanced use cases, we provide a full Lua scripting engine for unlimited possibilities.Every signal needs a home
A single Hase (gateway) connects all your Siebenschläfer™ displays to the internet — bridging LoRa radio to WiFi or Ethernet. Our custom RF protocol minimizes power consumption while end-to-end encryption keeps every transmission secure. One gateway, unlimited displays.
Technical Specifications
| Minimum brightness | 200 lux for 1 refresh per day, 400 lux for 1 refresh every 3 hours, use Extension-Panel (daiys chainable) for very low light conditions |
|---|---|
| Processor | STM32L496 |
| RAM | 4MB ultra low power parallel SRAM |
| Flash | 32MB |
| Storage | 32GB SD card |
| Radio technology | LoRa 433MHz (7km line-of-sight or ~3 thick walls) |
| Energy source | Integrated topcon solar panel |
| Energy storage | 5.5F VINATech EDLC Supercapacitors |
| Display type | E-paper – lifespan: 1 million updates |
| Resolution | 800 x 480 |
| Scripting | Lua |
| Touchscreen | No |
| Moving Images/Video | No (e-paper is a static display) |
| Supported Image Formats | PNG, JPG, SVG |
| Power consumption | 100 µW in standby |
| Refresh rate | every 5 minutes, given enough every is available |
| Size | Case: 21.5 x 15.5 x 1.7 cm Display: 16 x 9.6 cm |
| Processor | ESP32-S3 |
|---|---|
| RAM | 8MB |
| Flash | 8MB |
| Storage | 32GB SD card |
| Network | LoRa 433MHz, WiFi & Ethernet |
| Display type | E-paper – lifespan: 1 million updates |
| Scripting | Lua |
| Power supply | USB-C |
| Power consumption | 0.5 W |
| Size | Case: 7,7 x 6,4 x 2,1 cm Display: 5,7 x 3,8 cm |
Deep Tech
Nothing is left to chance. Every technical decision is deliberate, meticulously engineered, and optimized without compromise.LoRa Connectivity
Range meets Efficiency
We use the LoRa standard to achieve exceptional range with minimal power consumption. The data rate adapts dynamically to signal quality (Adaptive Data Rate), ensuring a stable and energy-efficient connection at all times.
Smart Tech Stack
Less Data, Full Flexibility
Instead of large image files, the system transmits efficient Lua scripts and raw data (JSON/XML). The powerful LVGL engine handles rendering directly on the device. Best of all: thanks to WebAssembly, the same firmware runs in your browser - enabling a pixel-perfect real-time preview.
Smart Heartbeat
Precision & Collision Avoidance
Each device synchronizes its internal clock with millisecond precision, waking only when data is ready. A deterministic algorithm uses a unique key to calculate an optimal time slot. This effectively prevents packet collisions, even with hundreds of devices on the same network.
Cryptographic Security
Modern Standards, No Legacy
Security is built in by design. We use elliptic curve cryptography (Ed25519) for digital signatures and AES for encryption. All keys are securely generated using modern SHA-based key derivation functions - ensuring every device is individually protected and authenticated.
Designed for Repair
Fix it, don't ditch it
True sustainability means maintainability. The enclosure is easy to open and fully disassemblable. Spare parts are available, STL files can be printed freely, and dedicated test points on the PCB simplify diagnostics. Built for longevity, not for the landfill.
Cloud Licensing
Standard
Everything for standalone operation
| Included with device purchase |
| Manage Unlimited Devices |
| Create Designs (WYSIWYG Editor) |
| Automation (Lua, API & Webhooks) |
Enterprise
For professional fleets & scaling
| 55 € / Month (Flatrate per Account) |
| Manage Unlimited Devices |
| Create Designs (WYSIWYG Editor) |
| Automation (Lua, API & Webhooks) |
| Auto-Roaming (Multi-Gateway) |
| Compliance & Audit Logs |
| Advanced Hardware Replacement |
| Factory Pre-provisioning |
| Priority Support |
No Cloud
Fully local, zero external dependencies
| One-time purchase, no subscription |
| No Cloud Required |
| Layout Editor available on Gateway |
| Automation (Lua, API & Webhooks) |