docs: add cellular data budget estimation vs Miotiq 1GB/10y quota

Breakdown per-transmission size (UDP+IP overhead + payload), daily/monthly/
yearly/10y consumption tables for both fixed (NebuleAir Pro 4G, 83B) and
mobile (MobileAir, 17B) modes at various transmission intervals, and a
with-signaling majorant (x1.5) for LTE-M worst case.

Recommended intervals: 5 min fixed (~12% budget) and 30s-in-motion mobile
(~16%), both leaving ample margin for descriptor growth and retries.

Flags scenarios that would exceed budget (fixed 30s continuous, mobile 10s
24/7) and lists TODOs around validating counting policy via Miotiq reports.
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2026-04-23 01:04:07 +02:00
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@@ -9,6 +9,7 @@ Documentation de référence pour tous les capteurs AirCarto : protocoles de com
```
aircarto-protocols/
├── CONVENTIONS.md Nommage, versioning, style doc
├── data-budget.md Estimation conso cellulaire vs budget Miotiq 1 Go/10 ans
├── formats/ Formats d'échange de données
│ ├── json-payload.md Format JSON canonique des mesures
│ ├── iso-pollutant-codes.md Mapping ISO_XX → polluant / grandeur