Using LWM2M
LWM2M device parameters view
JSON object model :
{
"page": 0,
"size": 20,
"totalCount": 2,
"data": [
{
"ep": "urn:lo:nsid:lwm2m:device1:2caf4e244430430e",
"securityMode": "PSK",
"pubKeyOrIdentity": "a1ebc03a72cf0671",
"device": "urn:lo:nsid:lwm2m:device1",
"creationTs": 1544019251440,
"updateTs": 1544019251440
},
{
"ep": "urn:lo:nsid:lwm2m:device2",
"securityMode": "PSK",
"pubKeyOrIdentity": "32202c4215c03f76",
"device": "urn:lo:nsid:lwm2m:device2",
"creationTs": 1544020350136,
"updateTs": 1544020350136
}
]
}LWM2M Notify messages are converted to Live Objects JSON data message. The screenshot below shows
a data message from an observe action on an LWM2M resource named "/3" (which is the standardised Device definition):
LWM2M data message model
Or as text:
{
"metadata": {
"source": "urn:lwm2m:device4",
"connector": "coap",
"network": {
"lwm2m": {
"ep": "urn:lwm2m:device4"
}
}
},
"streamId": "urn:lwm2m:device4!uplink",
"created": "2017-08-24T13:29:54.087Z",
"location": null,
"model": "urn:oma:lwm2m:oma:3",
"id": "599ed4d2a1a7e86004e2a4b8",
"value": {
"Device": {
"0": {
"17": "RGVtbw==",
"18": "MS4wLjE=",
"19": "MS4wLjI=",
"20": "Ag==",
"21": "AAHsAA==",
"Battery Level": 50,
"Timezone": "Europe/Paris",
"Firmware Version": "1.0.0",
"Memory Free": 93674,
"Current Time": "2017-08-24T13:29:51.000+0000",
"UTC Offset": "+02",
"Model Number": "Model 500",
"Serial Number": "LT-500-000-0001",
"Error Code": {
"0": 0
},
"Manufacturer": "Leshan Demo Device",
"Supported Binding and Modes": "U"
}
}
},
"timestamp": "2017-08-24T13:29:53.766Z",
"tags": []
}Where:
-
the streamId and the model are generated from the observed resource