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Version: 1.0

EM1Data

The EM1Data component stores data from an energy meter. It uses EM1Data as RPC namespace and provides the methods:

EM1Data components are identified with em1data:<id> in objects containing multiple component payloads.

Methods:​

EM1Data.SetConfig​

Properties:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

config

object

Configuration that the method takes

Find more about the config properties in config section

EM1Data.GetConfig​

Properties:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

Find the EM1Data.GetConfig response properties in config section

EM1Data.GetStatus​

Parameters:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

Find more about the status response properties in status section

EM1Data.GetRecords​

Parameters:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

ts

number

UNIX timestamp of the first interval. Used for selecting the next data chunk when the response is too large to fit in one call. Default is 0.

EM1Data.GetData​

Parameters:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

ts

number

UNIX timestamp of the first record. Any record with data having a timestamp between ts and end_ts will be retrieved.

end_ts

number

UNIX timestamp of the last record to get (if available). If the response is too big, it will be chunked. The default is to get all available records without limit.

add_keys

boolean

If false will not print the keys array in the response. The default is true.

info

The type of data structure returned is:

namespace EM1Data {

   interface DataKey {
      ts: number;
      period: string;
      values: number[][];
   }

   export interface GetDataResult {
      keys?: string[];
      data: DataKey[];
   }
}

Usually EM1Data.data will be an array containing a single object. There will be situations when the records will be interrupted (power loss) and then the array will contain more than one item.

EM1Data.DeleteAllData​

Parameters:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

  • Deletes all the data stored on the device, and nullifies the perpetual counters for the specified component.

EM1Data.ResetCounters​

Parameters:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

  • Reset the total counters for the specified component.

Configuration​

The EM1Data component doesn't have configuration options.

Status​

The status of the EM1Data component contains information about the perpetual counters and possible errors.

Parameters:

PropertyTypeDescription

id

number

Id of the EM1Data component instance

total_act_energy

number

Total active energy, Wh

total_act_ret_energy

number

Total active returned energy, Wh

errors

array of type string

Error condition occurred. May contain database_error, (shown if the error is present).

Notifications​

Data​

This notification is triggered whenever data is saved to the device flash. The format of the data is the same as EM1Data.GetData response. See the example below.

  • method: "NotifyEvent"
  • params:
    • ts: number, UNIX timestamp
    • event: "data"
    • component: id of the EM1Data component
    • data: array of objects:
      • ts: UNIX timestamp
      • period: Period of aggregated data
      • values: array of type number, data values corresponding to keys array of GetData method

StatusChange​

A StatusChange event of EM1Data is emitted when perpetual total active energy counters are saved to flash.

Modbus registers​

AddressTypeDescription
32300uint32Timestamp of the last update
32302floatTotal active energy, Wh
32304floatTotal active returned energy, Wh
32306floatLagging reactive energy, VARh
32308floatLeading reactive energy, VARh
32310floatTotal active energy - perpetual count, Wh
32312floatTotal active returned energy - perpetual count, Wh
323146 registers reserved

If there are more than one EM1Data component on the device, every next component's register block start address is calculated by adding 20 to the start address of the previous component. For example, EM1Data:1 will start at 32320.

CSV file download​

Alternatively to the RPC method GetData, the same data can be downloaded in CSV file by accessing a URL:

http://<device ip>/em1data/<id>/data.csv

Optional HTTP parameters ts, end_ts, and add_keys may be used the same way as in EM1Data.GetData. See the example below.

Examples​

EM1Data.SetConfig example​

http://192.168.33.1/rpc/EM1Data.SetConfig?id=0&config={}

Response

{
  "restart_required": false
}

EM1Data.GetConfig example​

http://192.168.33.1/rpc/EM1Data.GetConfig?id=0

Response

{}

EM1Data.GetStatus example​

http://192.168.33.1/rpc/EM1Data.GetStatus?id=0

Response

{
  "id": 0,
  "total_act_energy": 0,
  "total_act_ret_energy": 0
}

EM1Data.GetRecords example​

http://192.168.33.1/rpc/EM1Data.GetRecords?id=0&ts=0

Response

{
  "data_blocks": [
    {
      "ts": 1657739460,
      "period": 60,
      "records": 1
    },
    {
      "ts": 180,
      "period": 60,
      "records": 1
    },
    {
      "ts": 1657739580,
      "period": 60,
      "records": 2
    }
  ]
}

EM1Data.GetData example​

http://192.168.33.1/rpc/EM1Data.GetData?id=0&ts=1656356400&end_ts=1656356800

Response

{
  "keys": [
    "total_act_energy",
    "total_act_ret_energy",
    "lag_react_energy",
    "lead_react_energy",
    "max_act_power",
    "min_act_power",
    "max_aprt_power",
    "min_aprt_power",
    "max_voltage",
    "min_voltage",
    "avg_voltage",
    "max_current",
    "min_current",
    "avg_current"
  ],
  "data": [
    {
      "ts": 0,
      "period": 60,
      "values": [
        [
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0
        ],
        [
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0
        ]
      ]
    }
  ],
  "next_record_ts": 1656357000
}
info

Data units are: Wh, VAh, VARh, W, V, A

EM1Data.DeleteAllData example​

http://192.168.33.1/rpc/EM1Data.DeleteAllData?id=0

Response

null

EM1Data.ResetCounters example​

http://192.168.33.1/rpc/EM1Data.ResetCounters?id=0

Response

null

Notifications example​

  • When data is saved to the database in the device flash memory:

Example:

Notify that new data is saved.
{
   "src": "shellyproem-f008d1d8b8b8",
   "dst": "user_1",
   "method": "NotifyEvent",
   "params": {
      "ts": 1631266595.43,
      "events": [
        {
          "component":"em1data:0",
          "id":0,
          "event":"data",
          "ts":1631266595.43,
          "data":[
              {
                "ts":0,
                "period":60,
                "values":[
                  [0,0,0,0,0,0,0,0,0,0,0,0,0,0]
                ]
              }
          ],
        }
      ]
   }
}

CSV file download example​

Example 1:

Using curl GET to download CSV data with a header row.
curl -OJ http://192.168.33.1/em1data/0/data.csv?add_keys=true