In Azure IoT Central, “raw data” refers to the original telemetry data sent from a device before IoT Central processes, transforms, or interprets it.
🧠 Simple Explanation
Raw data = exactly what your device sends to the cloud (unchanged).
It is the low-level payload, typically JSON, coming directly from your device firmware.
📦 Example
Device sends telemetry:
{
"temperature": 25.3,
"humidity": 60,
"ts": "2026-05-06T01:00:00Z"
}
👉 This is raw data.
🔄 What IoT Central Does After Receiving Raw Data
IoT Central doesn’t just store raw data — it also:
-
✅ Maps it to a device template
-
✅ Converts it into structured telemetry
-
✅ Displays it in charts, dashboards
-
✅ Triggers rules/alerts
🧩 Raw Data vs Processed Data
|
Type |
Meaning |
|---|---|
|
Raw data |
Original payload from device |
|
Processed data |
Parsed & mapped to telemetry fields |
|
Insights |
Aggregated, visualized, or analyzed data |
🔍 Where You See Raw Data in IoT Central
You’ll encounter raw data in:
1. Raw Data View
-
Debugging device communication
-
Verifying payload format
2. Data Export
-
When exporting to:
-
Azure Blob Storage
-
Event Hubs
-
Data Lake
-
👉 In exports, raw data may appear as:
{
"body": {
"temperature": 25.3
},
"enqueuedTime": "...",
"deviceId": "device-001"
}
⚙️ Why Raw Data Matters
✅ Debugging
-
Check if device is sending correct JSON
-
Catch schema mismatch issues
✅ Integration
-
Feed downstream systems (analytics, ML, etc.)
-
No dependency on IoT Central templates
✅ Flexibility
-
Supports evolving payloads without breaking app logic
🆚 Raw Data vs Telemetry in IoT Central
|
Aspect |
Raw Data |
Telemetry (IoT Central) |
|---|---|---|
|
Format |
Original JSON |
Structured fields |
|
Processing |
None |
Parsed via model |
|
Use case |
Debug/export |
Dashboard, alerts |
|
Dependency |
Device payload |
Device template |
🧠 Key Takeaway
Raw data in IoT Central is the unprocessed telemetry payload sent directly from the device, before it’s interpreted or visualized by the platform.
Related content
转载自 CSDN-专业IT技术社区
原文链接：https://blog.csdn.net/qq_44645465/article/details/169128854
