QAgroTrust™ — Edge Telemetry Intelligence

Data Flow: From Soil to Decision Engine

Field Sensors

XRF, NIR, soil probes, microclimate stations capture raw field data every 15 minutes.

Edge Node

Microcontroller (ESP32 / ARM) aggregates sensor feeds, runs validation, buffers data locally.

Local Compute

Edge node runs NPK efficiency model (same logic as digital-twin page) to detect anomalies before cloud sync.

Cloud Archive

Insights and exceptions sync to QAgroTrust backend. Full history stays on farm device for offline operation.

Sensor Suite Deployed Per Field

🧪

XRF Spectrometer

Elemental analysis of soil: N, P, K, Ca, Mg, S, micronutrients. Non-destructive, field-ready.

Range: 0–500 ppm · Accuracy: ±2% · Update: 4x/season

📐

NIR Leaf Probe

Chlorophyll index via near-infrared reflectance. Correlates directly with N status in plant tissue.

Wavelength: 650–2500 nm · Resolution: ±0.2 SPAD · Update: Daily at 10:00 UTC

💧

Soil Moisture & EC

Volumetric water content & electrical conductivity (salt stress detection). Multi-depth probes.

Depth: 15, 30, 45 cm · Range: 0–100% VWC · Update: Every 30 min

🌡️

Microclimate Station

Temperature, relative humidity, wind speed, rainfall. Integrated Davis / Vaisala class equipment.

Accuracy: ±0.3°C, ±2% RH · Data rate: 5-min intervals

☀️

PAR (Light) Sensor

Photosynthetically active radiation (400–700 nm). Measures actual light capture capacity.

Range: 0–2500 µmol/m²/s · Accuracy: ±5% · Sample rate: 1 Hz

🛰️

GPS / RTK Positioning

Field geolocation for spatial NPK mapping. RTK module for cm-level accuracy in precision applications.

Accuracy: ±2.5 m (GPS) / ±2 cm (RTK) · Update: 1 Hz

Data Schema: Telemetry Payload

Every 15 minutes, the edge node sends telemetry to POST /api/telemetry/ingest. This is the contract for integrating new sensor types.

Field	Type	Example	Notes
`farmId`	string	`"FARM-0847"`	Unique farm identifier from portal
`fieldName`	string	`"Field A North Block"`	Human-readable field name
`lat, lng`	float	`12.4537, 78.9423`	GPS coordinates (WGS84)
`timestamp`	ISO8601	`"2026-07-20T14:32:00Z"`	UTC timestamp of reading
`n_kg_ha, p_kg_ha, k_kg_ha`	float	`124.5, 38.2, 151.8`	NPK in kg/hectare (from XRF or lab assay)
`soil_moisture_pct`	float	`58.3`	Volumetric water content 0–100%
`temp_c, rh_pct`	float	`28.5, 67.2`	Temperature (°C) and relative humidity (%)
`par_umol_m2_s`	float	`1240`	Photosynthetically active radiation
`chlorophyll_spad`	float	`42.8`	Relative chlorophyll content (SPAD index)
`edge_confidence`	float	`0.94`	Local model confidence (0.0–1.0) — anomaly if <0.7

Sample API Request

POST /api/telemetry/ingest
Authorization: Bearer FARM_TELEMETRY_TOKEN_FARM_0847
Content-Type: application/json

{
  "farmId": "FARM-0847",
  "fieldName": "Field A North Block",
  "lat": 12.4537,
  "lng": 78.9423,
  "timestamp": "2026-07-20T14:32:00Z",
  "n_kg_ha": 124.5,
  "p_kg_ha": 38.2,
  "k_kg_ha": 151.8,
  "soil_moisture_pct": 58.3,
  "temp_c": 28.5,
  "rh_pct": 67.2,
  "par_umol_m2_s": 1240,
  "chlorophyll_spad": 42.8,
  "edge_confidence": 0.94
}

🔗 For Hardware Teams & Developers

To deploy edge telemetry on a new farm: provision an ESP32 or Raspberry Pi with LoRaWAN or 4G connectivity, load the qagrotrust-edge-firmware (available on NRDC tech portal after TRL clearance), wire the sensor suite above, and point the device to api.qagrotrust.com/api/telemetry/ingest with a farm-issued authentication token. The firmware handles local NPK modeling, outlier detection, and offline buffering. No custom coding required — just sensor wiring and power.

Real-Time Metrics Computed at Edge

The edge node runs the same photosynthesis efficiency engine as the digital-twin page, but locally, every 15 minutes. Anomalies (efficiency <65%) trigger immediate farm alerts before data reaches the cloud.

Metric	Computation	Trigger
Photosynthetic Efficiency %	scoreAgainstOptimum(N, P, K) via edge Node.js runtime	Alert if < 65%
Irrigation Recommendation	IF soil_moisture < 40% AND par > 1000: increase water	Push to farmer app in real-time
Disease Risk Score	IF rh > 85% AND temp 20–28°C: elevated risk	Alert if risk > 0.7
Nutrient Leaching Risk	IF rainfall > 40mm AND n_kg_ha drops >15%: flag leaching	Advisory: split dose recommended

Sensors that understand photosynthesis before the harvest ends.