The Dragino LHT52 Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a built-in Temperature & Humidity sensor and has a USB Type-C sensor connector to connect to external sensors such as an external temperature sensor.

LHT52 senses environment temperature and humidity and sends these values via long-range wireless LoRaWAN protocol. It targets professional wireless sensor network applications such as food service, smart metering, smart cities, building automation, and so on.

LHT52 supports 2 x AAA batteries and works for a long time up to several years. Use can replace the batteries easily after they are finished.

LHT52 is fully compatible with LoRaWAN v1.0.3 protocol, it can work with standard LoRaWAN gateway.

LHT52 supports Datalog feature to make sure users won't miss sensor data. It records sensor values for every uplink. These values can be retrieved by LoRaWAN server via downlink command.

LHT52 supports temperature alarm feature. It can uplink alarm in a short interval while temperature exceeds preset limits.

Default FW in AS923, but it support US915, AU915 and all 900MHz Frequency by loading different FW, it could also support 868MHz if loading 868MHz FW, but there will be slight 0.5-1dB loss here. Customer could check with us if they need AU915 FW, we could reprogram it for customer

Features:

Wall Attachable.
LoRaWAN v1.0.3 Class A protocol.
Built-in Temperature & Humidity sensor
Optional External Probe
Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
AT Commands to change parameters
Remote configure parameters via LoRaWAN Downlink
Firmware upgradable via program port
Support 2 x AAA LR03 batteries.
Datalog feature
IP Rating: IP52

Applications:

Smart Buildings & Home Automation
Logistics and Supply Chain Management
Smart Metering
Smart Agriculture
Smart Cities
Smart Factory
Medical fridge measurement

Specifications:

Environment

Operating Temperature

-20 ~ 50°C

Storage Temperature

-20 ~ 50°C

Protection Level

IP52

Sensor accuracy

Built in Temperature / Humidity Sensor	Temperature range	-20 ~ 50 °C
	Accuracy	Resolution: 0.01°C Accuracy Tolerance : Typ ±0.3 °C Long Term Drift: < 0.02 °C/yr
	Humidity range	0 ~ 99%RH
	Accuracy	Resolution: 0.1 %RH Tolerance : Typ ±3 %RH

External Temperature Sensor

Temperature range

-55 °C ~ 125 °C

Accuracy

Resolution: 0.0625 °C

-10°C to +85°C : ±0.5°C

-55°C to +125°C: ±2°C

Cable length

2Meter

LoRaWAN frequency and Countries/Regions

Frequency	Status	Countries/Regions
EU868	OK	Europe and other
AU915, AS923	OK	Australia
		New Zealand
		Brunei
		Cambodia
		Hongkong
		Indonesia
		Japan
		Laos
		Singapore
		Taiwan
		Thailand
		Vietnam
CN470	OK	China
US915	OK	USA
KR920	OK	Korea

Datasheet: LHT52 datasheet.pdf

Operation manual: LHT52 User manual.pdf

Configure manual: LHT52 AT commands.pdf

Other documents: LHT52 Power Analyze.xlsx

Decorder: LHT52 decorder - TTN.txt

LHT52 - Ultra small indoor LoRaWAN Temperature & Humidity Sensor