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Current and energy meter

ELV LW-ESI LoRaWAN decoder and payload format

The ELV LW-ESI is a LoRaWAN current and energy meter that reports energy. It works from 5 to 35 °C.

ELV LW-ESI
Official decoderProduct page

Payload format

An uplink from the device as it arrives at the network server, and what the official decoder returns for it. Examples come from the decoder's own test cases.

Example 1 · fPort 10

Payload (hex)

03 01 0B DE 01 01 01 88 47 E8 15 00 00 AE AE 0A 00

Decoded (JSON)

{
  "Energy_Data": {
    "Boot_Flag": [
      "No_Overflow"
    ],
    "Consumption_Type": [
      "Consumption"
    ],
    "Energy_Counter": [
      36754.42
    ],
    "Energy_Counter_Unit": [
      "kWh"
    ],
    "Energy_Power_Unit": [
      "W"
    ],
    "Power": [
      7000.78
    ],
    "Signum_Of_Power": [
      "Positive"
    ]
  },
  "Supply_Voltage": 3038,
  "TX_Reason": "Timer_Event"
}
FieldValue
Energy_Data.Boot_Flag["No_Overflow"]
Energy_Data.Consumption_Type["Consumption"]
Energy_Data.Energy_Counter[36754.42]
Energy_Data.Energy_Counter_Unit["kWh"]
Energy_Data.Energy_Power_Unit["W"]
Energy_Data.Power[7000.78]
Energy_Data.Signum_Of_Power["Positive"]
Supply_Voltage3038
TX_ReasonTimer_Event

Example 2 · fPort 10

Payload (hex)

03 01 0B DC 01 02 01 70 5F BC 00 00 05 80 1A 06 00

Decoded (JSON)

{
  "Energy_Data": {
    "Boot_Flag": [
      "No_Overflow"
    ],
    "Consumption_Type": [
      "Delivery"
    ],
    "Energy_Counter": [
      1234.52
    ],
    "Energy_Counter_Unit": [
      "kWh"
    ],
    "Energy_Power_Unit": [
      "kW"
    ],
    "Power": [
      4000
    ],
    "Signum_Of_Power": [
      "Negative"
    ]
  },
  "Supply_Voltage": 3036,
  "TX_Reason": "Timer_Event"
}
FieldValue
Energy_Data.Boot_Flag["No_Overflow"]
Energy_Data.Consumption_Type["Delivery"]
Energy_Data.Energy_Counter[1234.52]
Energy_Data.Energy_Counter_Unit["kWh"]
Energy_Data.Energy_Power_Unit["kW"]
Energy_Data.Power[4000]
Energy_Data.Signum_Of_Power["Negative"]
Supply_Voltage3036
TX_ReasonTimer_Event

Specifications

Manufacturer
ELV
Model
LW-ESI
Type
Current and energy meter
Measures
energy
Operating temperature
5 … 35 °C
LoRaWAN regions
EU863-870

Connect it to Cloud Studio IoT

  1. 1

    Register the device in your network server

    Add it to The Things Stack, ChirpStack, Actility ThingPark or LORIOT with its DevEUI, JoinEUI and AppKey and the frequency plan of your region.

  2. 2

    Apply the decoder

    In The Things Stack, pick the model from the device repository and its decoder is applied for you. In ChirpStack v4, paste the official decoder as the device profile's JavaScript codec.

  3. 3

    Connect the network server to Cloud Studio IoT

    Set up the integration once per network server; every device registered there then reaches Cloud Studio IoT with its decoded values.

  4. 4

    Build dashboards and alarms

    The decoded fields become device variables for dashboards, alarms by email or SMS, and scheduled reports.

See your ELV LW-ESI on a dashboard

Start a free trial, add the device with its DevEUI and get dashboards and alarms from its next uplink.

Talk to us

Frequently asked questions

Device facts and decoder examples: The Things Network Device Repository (Apache-2.0) · commit 7693223, imported 2026-10-05.