Multientity plugin with more than two entities does not work

[manucarrace]

A device with the following data:

{
  "devices": [
    {
      "protocol": "IoTA-UL",
      "entity_name": "contador12",
      "entity_type": "multientity",
      "attributes": [
        {
          "expression": "${@cont1}",
          "name": "vol",
          "type": "string",
          "entity_name": "WaterMeter01",
          "entity_type": "WaterMeter"
        },
        {
          "expression": "${@cont1}",
          "name": "vol",
          "type": "string",
          "entity_name": "WaterMeter02",
          "entity_type": "WaterMeter"
        },
        {
          "expression": "${@cont1}",
          "name": "vol",
          "type": "string",
          "entity_name": "WaterMeter03",
          "entity_type": "WaterMeter"
        },
        {
          "expression": "${@cont1}",
          "name": "vol",
          "type": "string",
          "entity_name": "WaterMeter04",
          "entity_type": "WaterMeter"
        }        
      ],
      "device_id": "test99"
    }
  ]
}

When a measure is sent to the iotagent, only the first two entities are properly updated. The rest of entities are not updated with the value of the attribute.

Device was provisioned with:

curl -i --location --request POST 'http://localhost:18082/iot/devices' \
--header 'Content-Type: application/json' \
--header 'fiware-service: smartcity' \
--header 'fiware-servicepath: /' \
-d '{
"devices": [
{
"protocol": "IoTA-UL",
"entity_name": "contador14",
"entity_type": "multientity",
"attributes": [
{
"expression": "${@cont1}",
"name": "vol",
"type": "string",
"entity_name": "WaterMeter01",
"entity_type": "WaterMeter"
},
{
"expression": "${@cont1}",
"name": "vol",
"type": "string",
"entity_name": "WaterMeter02",
"entity_type": "WaterMeter"
},
{
"expression": "${@cont1}",
"name": "vol",
"type": "string",
"entity_name": "WaterMeter03",
"entity_type": "WaterMeter"
},
{
"expression": "${@cont1}",
"name": "vol",
"type": "string",
"entity_name": "WaterMeter04",
"entity_type": "WaterMeter"
}
],
"device_id": "contador14"
}
]
}'

If we change the name of the attribute "vol" by a specific name for each entity (lets say vol1, vol2, vol3 and vol4) it works.

[AlvaroVega]

It worked to me with a device provisioned like: just with different object_id per attribute an then sending measure:

mosquitto_pub -h localhost -t /json/mhbgcrkex4j4rif2rlq3uo5ut/contador12/attrs -m '{"cont1": 34}' -u iota -P 'XXXX'

[AlvaroVega]

It seems that multientity plugins is not working well when attributes object_id is the same, since that plugin relies sometimes in that value https://github.com/telefonicaid/iotagent-node-lib/blob/master/lib/plugins/multiEntity.js#L176

[fgalan]

Once PR https://github.com/telefonicaid/iotagent-node-lib/pull/878 has been merged, can this issue be closed?