As a logistics manager, I want the e-paper shipping tags to have a clear battery indicator, so that I can ensure they are sufficiently charged to last the whole shipping journey.
Acceptance Criteria
[ ] The battery level can be seen on the e-paper display without activating the tag.
[ ] The battery indicator should display the battery level in at least 4 clearly distinct levels (e.g. 25%, 50%, 75%,100%).
[ ] The battery indicator should change color or pattern as the battery level drops (e.g. green for full, yellow for medium, red for low).
[ ] There should be a low battery warning when the charge drops below 10%.
[ ] The tag should automatically turn off to preserve the remaining battery when reaching a critical level (<5%).
[ ] The shipping tag must retain the last known location data before it auto shuts down due to low battery.
[ ] It should be possible to check the battery status remotely through a wireless protocol.
[ ] The tag should record the battery level history for post-journey analysis.
sequenceDiagram
participant L as Logistics Manager
participant T as E-Paper Tag
participant S as Server
L->>T: Check battery level
T-->>L: Display battery level
T->>S: Send battery status
S-->>L: Show battery status on platform
Note right of T: Battery level drops below 5%
T->>S: Send last known location & auto shutdown
Battery Indicator for E-Paper Shipping Tags
As a logistics manager, I want the e-paper shipping tags to have a clear battery indicator, so that I can ensure they are sufficiently charged to last the whole shipping journey.
Acceptance Criteria