Turn demonstrations into defined states
Prototype code often assumes the next action will succeed. Product code names the states before, during and after that action, then gives timeouts and recovery paths the same attention as the happy path.
Separate responsibilities across the stack
Clarify which decisions belong to firmware, the mobile application and the backend. A reliable system avoids duplicating business rules without a documented ownership model.
- Device capability and safety constraints
- Application interaction and local state
- Cloud identity, data and remote operations
- Shared protocol and compatibility rules
Define what ready to ship means
Release criteria should include physical-device testing, repeatable builds, error evidence, supported versions and handover material. This turns delivery from a visual approval into an engineering decision.
The result is not merely more documentation. It is a product that can be diagnosed, changed and transferred without rediscovering its basic behavior.
