Azure IoT Development Cookbook

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Device twin metadata always maintains the last updated timestamp for any modifications. This is the UTC timestamp maintained in the metadata.

Device twin format is a JSON format in which the tags, desired, and reported properties are stored; here is a sample JSON with different nodes showing how it is stored:

"tags": {  "$etag": "1234321",   "location": {    "country": "India"    "city": "Mumbai",    "zipCode": "400001"  }},"properties": {  "desired": {    "latitude": 18.75,    "longitude": -75.75,    "status": 1,    "$version": 4  },  "reported": {    "latitude": 18.75,    "longitude": -75.75,    "status": 1,    "$version": 4  }}