Project 8: Smart Home API v3 + Matter State Sync
Deliver reliable device control with accurate state reporting and drift detection.
Quick Reference
| Attribute | Value |
|---|---|
| Difficulty | Level 3 (Advanced) |
| Time Estimate | 2 weeks |
| Main Programming Language | TypeScript |
| Alternative Programming Languages | Python, Java |
| Key Topics | v3 directives, state consistency, partial failure handling |
1. Learning Objectives
- Model endpoints and capabilities using Smart Home API v3 semantics.
- Build state reconciliation between cloud and physical device states.
- Handle partial success in grouped commands with honest user messaging.
2. All Theory Needed (Per-Concept Breakdown)
Concept A: Directive and State Contract
- Discovery, directive execution, and state reporting must be consistent.
- Capability declarations are strict contracts.
Concept B: Drift Management
- Compare expected and observed state continuously.
- Escalate stale or conflicting states to recovery flow.
3. Architecture and Build Plan
- Build endpoint capability map.
- Implement command execution + acknowledgment path.
- Add drift detector and reconciliation strategy.
4. Validation and Testing
- Discovery payload validates.
- State report latency within target.
- Partial failures are surfaced correctly.
5. Troubleshooting
- Symptom: Alexa says success while one device remains unchanged.
- Fix: require per-device acknowledgment before final confirmation.
6. Deliverables
- Capability schema document.
- Drift incident report template.
- Partial failure messaging policy.
7. Stretch Goals
- Add local-first optimization for low-latency command confirmation.