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Current and energy meter

YOBIIQ EM4301-CT LoRaWAN decoder and payload format

The YOBIIQ EM4301-CT is a LoRaWAN current and energy meter that reports current, power, voltage and digital inputs.

YOBIIQ EM4301-CT
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 1

Payload (hex)

01 01 67 3B 24 0C 02 03 67 3B 21 B4 03 04 03 08 0F 04 04 05 00 00 00 00 05 06 00 00 00 00 06 07 00 00 00 00 0B 0A 00

Decoded (JSON)

{
  "timestamp": 1731929100,
  "dataloggerTimestamp": 1731928500,
  "activeEnergyImportL123T1": {
    "data": 50859780,
    "unit": "Wh"
  },
  "activeEnergyImportL123T2": {
    "data": 0,
    "unit": "Wh"
  },
  "activeEnergyExportL123T1": {
    "data": 0,
    "unit": "Wh"
  },
  "activeEnergyExportL123T2": {
    "data": 0,
    "unit": "Wh"
  },
  "modbusErrorCode": 0,
  "codecVersion": "1.0.1",
  "genericModel": "EM4301",
  "productCode": "P1002011",
  "manufacturer": "YOBIIQ B.V."
}
FieldValue
timestamp1731929100
dataloggerTimestamp1731928500
activeEnergyImportL123T1.data50859780
activeEnergyImportL123T1.unitWh
activeEnergyImportL123T2.data0
activeEnergyImportL123T2.unitWh
activeEnergyExportL123T1.data0
activeEnergyExportL123T1.unitWh
activeEnergyExportL123T2.data0
activeEnergyExportL123T2.unitWh
modbusErrorCode0
codecVersion1.0.1
genericModelEM4301
productCodeP1002011
manufacturerYOBIIQ B.V.

Example 2 · fPort 50

Payload (hex)

FF 09 02 00 FF 0A 01 29 FF 16 01 54 6C 88 FF 0F 02 FF 0B 01 FF 1E 00 96 FF 1F 05 FF 20 00 00 00 E6 FF 21 00 E6 FF 28 45 4D 34 33 30 31 43 54

Decoded (JSON)

{
  "hardwareVersion": "V2.0",
  "firmwareVersion": "V1.29",
  "deviceSerialNumber": 22310024,
  "deviceClass": "Class C",
  "powerEvent": "AC Power On",
  "primaryCurrentTransformerRatio": 150,
  "secondaryCurrentTransformerRatio": 5,
  "primaryVoltageTransformerRatio": 230,
  "secondaryVoltageTransformerRatio": 230,
  "deviceModel": "EM4301CT",
  "codecVersion": "1.0.1",
  "genericModel": "EM4301",
  "productCode": "P1002011",
  "manufacturer": "YOBIIQ B.V."
}
FieldValue
hardwareVersionV2.0
firmwareVersionV1.29
deviceSerialNumber22310024
deviceClassClass C
powerEventAC Power On
primaryCurrentTransformerRatio150
secondaryCurrentTransformerRatio5
primaryVoltageTransformerRatio230
secondaryVoltageTransformerRatio230
deviceModelEM4301CT
codecVersion1.0.1
genericModelEM4301
productCodeP1002011
manufacturerYOBIIQ B.V.

Specifications

Manufacturer
YOBIIQ
Model
EM4301-CT
Type
Current and energy meter
Measures
current, power, voltage, digital inputs
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 YOBIIQ EM4301-CT 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.