Domek App - Smart home & PHEV
Turborepo system: cloud Express API + TimescaleDB + WebSocket, LAN home-bridge on Pi (inverter, LEDs, motion), Expo app with wall mode - no inbound ports to the house.
Technologies
TypeScript
Node.js
Express
React Native
Expo
TimescaleDB
WebSocket
Raspberry Pi
Docker
Prisma?Challenge
Unify PV, dynamic tariffs, Tuya, and PHEV charging while keeping LAN hardware and cameras private and reachable without port-forwarding.
✓Solution
Split cloud logic from edge agent: ingest from bridge, command queues for LAN devices, Charging Brain with PV surplus rules, go2rtc WebRTC for Tapo cameras.
Key decisions
Charging Brain
Priority rules: user windows → PV export threshold → min 30 min ON grace - no relay chatter.
Cloud brain, edge hands
Bridge only outbound HTTPS; cloud queues LED commands and accepts inverter ingest with X-Bridge-Key.
Privacy-first cameras
Tapo offline → go2rtc on Pi → WebRTC in app (~0.2–0.5 s), local motion via ffmpeg/RTSP.
Results
Automated PHEV charging from PV surplus
Local camera streams without vendor cloud
Real-time energy dashboard on phone & wall tablet
