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GPS tracker

comtac LPN TD-1 LoRaWAN decoder and payload format

The comtac LPN TD-1 is a LoRaWAN GPS tracker that reports GPS position, Wi-Fi position and temperature. It is rated IP67, it runs on a Rechargable Li-Po Battery 1.4Ah battery and it works from -20 to 60 °C.

comtac LPN TD-1
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 3

Payload (hex)

01 A8 C2 0A 01 02 D7 AD 10 00 83 B6 49 F5 02 04 FE EC DA AD 1D 16 36 FC EC DA AD 1D 16 36 0E EC DA AD 1D 16 37 FC EC DA A7 32 21 3B

Decoded (JSON)

{
  "posStatus": "GPS AND WIFI OK",
  "pingType": "LONGRANGE",
  "batVoltage": 3.97,
  "temp": 10,
  "gpsLat": 47.688976,
  "gpsLong": 8.631881,
  "gpsEPE": "> 150 meters",
  "gpsSAT": 5,
  "MAC1": "fe:ec:da:ad:1d:16",
  "RSSI1": -54,
  "MAC2": "fc:ec:da:ad:1d:16",
  "RSSI2": -54,
  "MAC3": "0e:ec:da:ad:1d:16",
  "RSSI3": -55,
  "MAC4": "fc:ec:da:a7:32:21",
  "RSSI4": -59
}
FieldValue
posStatusGPS AND WIFI OK
pingTypeLONGRANGE
batVoltage3.97
temp10
gpsLat47.688976
gpsLong8.631881
gpsEPE> 150 meters
gpsSAT5
MAC1fe:ec:da:ad:1d:16
RSSI1-54
MAC2fc:ec:da:ad:1d:16
RSSI2-54
MAC30e:ec:da:ad:1d:16
RSSI3-55
MAC4fc:ec:da:a7:32:21
RSSI4-59

Example 2 · fPort 3

Payload (hex)

01 08 C3 1A

Decoded (JSON)

{
  "posStatus": "NONE",
  "pingType": "LONGRANGE",
  "batVoltage": 3.975,
  "temp": 26
}
FieldValue
posStatusNONE
pingTypeLONGRANGE
batVoltage3.975
temp26

Specifications

Manufacturer
comtac
Model
LPN TD-1
Type
GPS tracker
Measures
GPS position, Wi-Fi position, temperature
Protection
IP67
Battery
Rechargable Li-Po Battery 1.4Ah
Operating temperature
-20 … 60 °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 comtac LPN TD-1 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.