Turns SenML (JSON or CBOR) and LwM2M TLV into one record shape

Turns SenML (JSON or CBOR) and LwM2M TLV into one record shape: resolved name, unit, absolute timestamp, typed value. Optionally puts every series on a shared time axis with a chosen interval and fill rule (last value, bucket mean, linear). Works only on the payload you pass: no device is contacted, nothing is stored, the same request returns the same bytes. TLV carries no type on the wire; unmapped resource ids come back as opaque base64 with a warning instead of a guess.

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Endpoint

POST https://tools.halowerk.com/v1/telemetry/normalize

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "align": true,
    "align_method": "last",
    "format": "senml_json",
    "interval_s": 60,
    "payload": [
      {
        "bn": "urn:dev:ow:10e2073a:",
        "bt": 1786000000,
        "bu": "Cel",
        "n": "temp",
        "v": 21.3
      },
      {
        "n": "temp",
        "t": 60,
        "v": 21.9
      },
      {
        "n": "hum",
        "t": 60,
        "u": "%RH",
        "v": 48
      }
    ]
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "align": {
              "default": false,
              "description": "Also return every numeric series on one shared time grid.",
              "type": "boolean"
            },
            "align_method": {
              "default": "last",
              "description": "How a grid point is filled: last value at or before the point, mean over the bucket, or linear interpolation between neighbours.",
              "enum": [
                "last",
                "mean",
                "linear"
              ],
              "type": "string"
            },
            "base_name": {
              "description": "Prefix put in front of every resolved record name. For lwm2m_tlv this is where the device identity goes.",
              "maxLength": 200,
              "type": "string"
            },
            "base_time_unix_s": {
              "description": "Anchor in seconds since 1970 for records that carry no absolute time. SenML calls times below 2^28 relative to now; this endpoint is stateless and will not invent a now.",
              "type": "number"
            },
            "format": {
              "description": "Wire format of payload. senml_cbor and lwm2m_tlv expect base64.",
              "enum": [
                "senml_json",
                "senml_cbor",
                "lwm2m_tlv"
              ],
              "type": "string"
            },
            "interval_s": {
              "default": 60,
              "description": "Grid spacing in seconds. The grid may not exceed 10000 points.",
              "maximum": 86400,
              "minimum": 0.001,
              "type": "number"
            },
            "max_records": {
              "default": 5000,
              "description": "Upper bound on records taken from the payload.",
              "maximum": 20000,
              "minimum": 1,
              "type": "integer"
            },
            "payload": {
              "description": "SenML records as a JSON array (or a JSON string holding one), or base64 for senml_cbor and lwm2m_tlv. At most 1000000 bytes after decoding; the service caps the whole request body at 256 KB."
            },
            "tolerance_s": {
              "default": 0,
              "description": "align_method=last only: how stale the carried value may be before the grid point is left empty. 0 means no limit.",
              "maximum": 86400,
              "minimum": 0,
              "type": "number"
            },
            "value_types": {
              "description": "lwm2m_tlv only: resource id as key, one of integer, float, boolean, string, time, opaque as value. Ids left out come back as opaque base64 with a warning instead of a guessed type.",
              "type": "object"
            }
          },
          "required": [
            "format",
            "payload"
          ],
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}

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