Table of Contents:

• 1.  Introduction
  • 1.1 ​ What is LPT01 LoRaWAN Handheld Food Thermometer
  • ​1.2  Features
  • 1.3  Specification
  • 1.4 ​ Applications
  • 1.5  Sleep mode and working mode
  • 1.6  Button & LEDs
  • 2.1  How it works?
  • 2.2  ​Quick guide to connect to LoRaWAN server (OTAA)
  • 2.3  ​Working Mode & Uplink Payload
    • 2.3.1  Device Status, FPORT=5
    • 2.3.2  General acquisition mode, FPORT=2
      • Battery
      • Unix TimeStamp
      • Unit&sampling _times
      • temperature(PT100)
    • 2.3.3  Continuous Uplink mode, FPORT=2
  • 2.4  Unix TimeStamp
    • 2.4.1  Set Device Time
• 3.  Configure LPT01 via AT Command or LoRaWAN Downlink
  • 3.1  Set Transmit Interval Time
  • 3.2  Set Continuous uplink mode
  • 3.3 Set time synchronization method
  • 3.4 Set time synchronization interval
  • 3.5 Temperature Unit
  • 3.6 Button response time
• 4.  Battery & Power Consumption
• 5.  OTA Firmware update
• 6.  FAQ
• 7.  Trouble Shooting
• 8.  Order Info
• 9. ​ Packing Info
• 10.  ​Support

1.  Introduction

1.1 ​ What is LPT01 LoRaWAN Handheld Food Thermometer

Handheld temperature probes are vital tools for food safety, disease prevention, and regulatory compliance. They help ensure food stays out of the danger zone and that harmful pathogens are effectively eliminated.

The LPT01 is a LoRaWAN-enabled food temperature probe designed for remote monitoring of food temperature. It automatically records temperature data and uploads it to an IoT platform, helping meet food safety regulations while reducing manual documentation errors and saving time.

With real-time alerts for temperature deviations, the LPT01 enhances food safety by allowing swift corrective actions to prevent potential hazards. Its long-range LoRaWAN connectivity ensures reliable data transmission and simplifies deployment and maintenance—dramatically lowering operational costs for food safety management.

​1.2  Features

• LoRaWAN v1.0.3 Class A protocol
• LCD display
• Uplink on periodically or alarm event
• PT100 Temperature Sensor
• CR123A 1500mAh Battery

1.3  Specification

Common DC Characteristics:

• Supply Voltage: Built-in Battery , 2.5v ~ 3.0v
• Operating Temperature: -40 ~ 85°C

Probe Spec:

• LPT01 total length: 28cm
• Probe length: 13.5cm
• Probe diameter: 4mm
• External A-grade PT100 temperature sensor
• Class A PT100 collects temperature accuracy ±(0.15 + 0.002 * |t|)°C
• Resolution: 0.01 °C
• Operating Range: -50 °C to 260 °C

LoRa Spec:

• Frequency Range,  Band 1 (HF): 862 ~ 1020 Mhz
• Max +22 dBm constant RF output vs.
• RX sensitivity: down to -139 dBm.
• Excellent blocking immunity

Battery:

• CR123A non-rechargeable battery
• Capacity: 1500mAh
• Self-Discharge: <1% / Year @ 25°C
• Max continuously current: 130mA
• Max boost current: 2A, 1 second

Power Consumption

• Sleep Mode: 5uA @ 3.3v
• LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm

1.4 ​ Applications

• Logistics and Supply Chain Management
• Food management
• Cold chains solution
• Industrial Monitoring and Control

1.5  Sleep mode and working mode

Deep Sleep Mode: Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life.

Working Mode: In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode.

1.6  Button & LEDs

Reset Behavior	Function	Response
Three buttons×5	Reset Device	Reset the device, the signal icon​​​​  on the LCD will flash continuously until LoRaWAN joins.
Behavior on STOP	Function	Response
>2s	Exits continuous reporting mode	LCD displays "OFF".
×3	Deactivate Device	Enters deep sleep mode; LCD displays "SLP".
Behavior on ℃/℉	Function	Response
>3s	Toggle Units	Switches between °C/°F, converts current value, and saves as default.
Behavior on HOLD	Function	Response
×1	Send one uplink	If sensor is already Joined to LoRaWAN network, sensor will send an uplink packet, LCD screen displays the current temperature once.
>3s	Toggle Continuous Mode	After entering Continuous mode, "→" icon flashes. LCD updates temperature in real-time. Press again to pause/resume updates.(Click the "HOLD" button, and the temperature value on the LCD screen will be locked at the current value. Click the "HOLD" button again, and the temperature on the LCD screen will resume to change continuously.)

2.1  How it works?

2.2  ​Quick guide to connect to LoRaWAN server (OTAA)

Following is an example for how to join the TTN v3 LoRaWAN Network. Below is the network structure; we use the LPS8v2  as a LoRaWAN gateway in this example. 

The LPS8V2 is already set to connected to TTN network , so what we need to now is configure the TTN server.

Step 1: Create a device in TTN with the OTAA keys from LPT01.

Each LPT01 is shipped with a sticker with the default device EUI as below:

You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:

Create the application.

Add devices to the created Application.

Enter end device specifics manually.

Add DevEUI and AppKey.

Customize a platform ID for the device.

Step 2: Add decoder

In TTN, user can add a custom payload so it shows friendly reading.

Click this link to get the decoder: https://github.com/dragino/dragino-end-node-decoder/tree/main/

Below is TTN screen shot:

Step 3: Activate on LPT01

Press the button for 5 seconds to activate the LPT01.

Green led will fast blink 5 times, device will enter OTA mode for 3 seconds. And then start to JOIN LoRaWAN network. Green led will solidly turn on for 5 seconds after joined in network.

After join success, it will start to upload messages to TTN and you can see the messages in the panel.

2.3  ​Working Mode & Uplink Payload

2.3.1  Device Status, FPORT=5

Users can send a downlink command (0x26 01) to request the LP01 device to report its configuration details.

Upon receiving this command, the LP01 will respond by uplinking a payload through FPort 5, formatted as follows:

Example in TTN: 

Sensor Model: For LPT01, this value is 0x35

Firmware Version: 0x0100, Means: v1.0.0 version

Frequency Band:

0x01: EU868

0x02: US915

0x03: IN865

0x04: AU915

0x05: KZ865

0x06: RU864

0x07: AS923

0x08: AS923-1

0x09: AS923-2

0x0a: AS923-3

0x0b: CN470

0x0c: EU433

0x0d: KR920

0x0e: MA869

Sub-Band:

AU915 and US915:value 0x00 ~ 0x08

CN470: value 0x0B ~ 0x0C

Other Bands: Always 0x00

Battery Info:

Check the battery voltage.

Ex1: 0x0BE3 = 3043mV

Ex2: 0x0B49 = 2889mV

2.3.2  General acquisition mode, FPORT=2

Behavior:

• Periodic Uplink: Device transmits sensor data at fixed intervals configured by AT+TDC(default: 20 minutes).
• Trigger Condition: Only time-based (no external triggers).

Uplink Payload Format:

Example in TTN: 

Example:

• Positive: If payload is 09DDH, (09DD & 8000 == 0), temp = 09DDH /100 = 25.25 
• Negative: If payload is FF3FH,  (FF3F & 8000 == 1) , temp = (FF3FH - 65536)/10 = -19.3 

(FF3F & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative)

• If the value is -327.6, it means the PT100 probe is not connected.

​Note: The temperature unit is determined based on the "Unit" of the previous byte.

2.3.3  Continuous Uplink mode, FPORT=2

Default Configuration: AT+WMOD=1,10,6,10,0,0

On-Demand: When triggered by the AT+WMOD command (e.g., entering continuous uplink mode).

In Continuous Sampling Mode(AT+WMOD=a,b,c,d,e,f), LPT01 will record the current sensor data at a fix interval, and report multiply group of data together to IoT server later.

AT+WMOD=a,b,c,d,e,f format:

• a : Setting LPT01 Turns Continuous Sampling Mode On or Off.(1: ON, 0:OFF)
• b : Set Sampling Interval, Unit: Second.(Range: 0~255)
• c :  Define how many group of data will be uplink together. (max: 100)
• d : Duration of operation in continuous acquisition mode.(Range: 0~255)
• e : Set the temperature lower limit value, below the lower limit value will exit the alarm.
• f :  Set the upper temperature limit value, above the upper limit value will trigger an alarm.

When LPT01 is in Continuous Sampling Mode, the TDC time setting is disabled, and LPT01 will send uplink once it finished the number of sampling define in "b".

Example Command: AT+WMOD=1,5,5,5,0,10

When the measured temperature is outside the set range of 0℃~10℃, the continuous measurement mode will be activated, the duration is 5min, the sampling interval is 5s once, a total of 5 times of collection, and the integrated data will be reported once, So the payload for each uplink will include:

• Battery (2 bytes)
• + Group1 Sensor Value (2 Bytes): the last 4th reading for Temp
• + Group2 Sensor Value (2 Bytes): the last 3rd reading for Temp
• + Group3 Sensor Value (2 Bytes): the last 2nd reading for Temp
• + Group4 Sensor Value (2 Bytes): the last reading for Temp
• + Group5 Sensor Value (2 Bytes): reading for Temp

So totally 12 bytes payload in this example.

Notice: Continuous sampling mode may result in a longer payload. the LPT01 will automatically select the appropriate DR uplink data. This may shorten the transmission distance.

Uplink packets use FPORT=2.

Example parse in TTNv3.

​​​

2.4  Unix TimeStamp

LPT01 uses Unix TimeStamp format based on

Users can get this time from the link:  https://www.epochconverter.com/ :

Below is the converter example

2.4.1  Set Device Time

3.  Configure LPT01 via AT Command or LoRaWAN Downlink

• AT Command Connection: See FAQ.

• LoRaWAN Downlink instruction for different platforms: IoT LoRaWAN Server

• General system settings like: uplink interval.

• LoRaWAN protocol & radio related command.

​

3.1  Set Transmit Interval Time

Feature: Change LoRaWAN End Node Transmit Interval.

AT Command: AT+TDC

3.2  Set Continuous uplink mode

Feature: Get or set uplink behaviour in continuous uplink mode.

AT Command: AT+WMOD

Downlink Command: 0xA2

• Downlink payload: 0xA2010505050000000A         // Same as AT+WMOD=1,5,5,5,0,10
• Downlink payload: 0xA20105050500000000         // Same as AT+WMOD=1,5,5,5,0,0

Note: If you need to enter the continuous uplink mode immediately, you can control it by going downlink.

• Downlink payload: 0xA5 01 //  After receiving the downlink, LPT01 will enter the continuous uplink mode, but if it detects that the current sampled temperature is lower than the set minimum threshold, it will automatically exit the continuous uplink mode。
• Downlink payload: 0xA4 01 //  After receiving the downlink, LPT01 will directly exit the continuous uplink mode.

3.3 Set time synchronization method

Feature: This command is used to enable automatic time calibration by time zone(Get or Set time synchronization method).

AT Command: AT+SYNCMOD

Downlink Command: 0x28

Format: Command Code (0x28) followed by 2 bytes.

• Example 1: Downlink Payload: 28 00 00       //  Turn off the time zone calibration time.
• Example 2: Downlink Payload: 28 01 FA      //   Turn on time zone calibration time, UTC-6
• Example 3: Downlink Payload: 28 01 06      //   Turn on time zone calibration time, UTC+6

Note: UTC-6: 256+(-6)=250(D)=0xFA(H)

3.4 Set time synchronization interval

Feature: Get or set time synchronization interval in day or hour.

AT Command: AT+SYNCTDC

Downlink Command: 0x29

Format: Command Code (0x29) followed by 3 bytes.

• Example 1: Downlink Payload: 29  0C 00     //  Calibrate once every 12 days
• Example 2: Downlink Payload: 29  0C 01     //  Calibrate once every 12 hours

3.5 Temperature Unit

Feature: Get or set Temperature Unit.

AT Command: AT+UNIT

Note: In US915 Band, Default unit is ℉, In other bands, default unit is ℃.

Downlink Command: 0xA1

Format: Command Code (0xA1) followed by 1 bytes.

• Example 1: Downlink Payload: A1 00     //  Same as AT+UNIT=0
• Example 2: Downlink Payload: A1 01     //  Same as AT+UNIT=1

3.6 Button response time

Feature: Get or set the response time for the hold button.

AT Command: AT+HOLDT

Note:By default, if the device is in idle mode, pressing and holding the HOLD button for 50 milliseconds to 2000 milliseconds will cause the device to send the temperature to the server..

Downlink Command: 0xA3

Format: Command Code (0xA3) followed by 4 bytes.

• Example 1: Downlink Payload: A3 00 32 07 D0     //  Same as AT+HOLDT=50,2000
• Example 2: Downlink Payload: A3 00 C8 07 D0     //  Same as AT+HOLDT=200,2000

4.  Battery & Power Consumption

LPT01 uses CR123A battery pack. See below link for detail information about the battery info and how to replace.

Battery Info & Power Consumption Analyze .

5.  OTA Firmware update

User can change firmware LPT01 to:

• Change Frequency band/ region.
• Update with new features.
• Fix bugs. 

6.  FAQ

7.  Trouble Shooting

8.  Order Info

Part Number : LPT01-XX

XX: The default frequency band

• AS923 : LoRaWAN AS923 band
• AU915 : LoRaWAN AU915 band
• EU433 : LoRaWAN EU433 band
• EU868 : LoRaWAN EU868 band
• KR920 : LoRaWAN KR920 band
• US915 : LoRaWAN US915 band
• IN865 :  LoRaWAN IN865 band
• CN470 : LoRaWAN CN470 band

9. ​ Packing Info

Package Includes:

• LPT01 LoRaWAN Temperature Collector x 1

Dimension and weight:

• Device Size: cm
• Device Weight: g
• Package Size / pcs : cm
• Weight / pcs : g

10.  ​Support

• Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
• Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to support@dragino.com.