BLE-to-HDMI Display Dongle
Any Screen. Your Data. Zero Cloud.
Plug into any TV or monitor. Stream from Core via BLE or WiFi. No subscription. No tracking.
Big screen output without Big Tech surveillance.
No account required. No data collection. No ads. Just display.
USB stick size. Plug into HDMI. Power from TV USB. Done.
Works with any TV, monitor, or projector with HDMI input.
Dual-radio design for maximum flexibility.
Core is the hub. Cast is the display endpoint.
BLE for control & UI • WiFi for video streaming
Low-latency control signals, notifications, text-based UI, status displays. ~1 Mbps max.
Video streaming, screen mirroring, media playback. ~100+ Mbps for 4K content.
BLE for commands, WiFi for content. Automatic switching based on data type.
Component-level cost breakdown at scale.
| Component | Part | Unit Cost (1K) | Unit Cost (10K) |
|---|---|---|---|
| SoC | Allwinner H6 / Amlogic S905 | $8.00 | $6.50 |
| WiFi 6 + BLE 5.0 | Realtek RTL8822CE or similar | $4.50 | $3.50 |
| RAM | 512MB DDR3 | $2.00 | $1.50 |
| eMMC | 4GB | $2.50 | $2.00 |
| HDMI Encoder | Integrated in SoC | — | — |
| PCB + Assembly | 4-layer, SMT | $6.00 | $4.00 |
| HDMI Connector | Type A male | $0.80 | $0.50 |
| USB Cable | Power pigtail | $0.60 | $0.40 |
| Enclosure | Injection molded ABS | $2.00 | $1.20 |
| Antenna | PCB integrated | $0.50 | $0.30 |
| Misc (passives, etc.) | Capacitors, resistors, etc. | $1.50 | $1.00 |
| TOTAL COGS | $28.40 | $20.90 |
Hardware margin. No subscription required.
Display anything from Core on any screen.
Health metrics, calendar, notifications on living room TV.
Plug into hotel TV. Your content, your privacy.
Conference room display. No account login required.
Photos, videos from Core to shared screen.
Display health data for doctor visits.
Simple games streamed from Castle via Core.
Castle brain → Core hub → Cast display. Local AI. Private data. Your screens.