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LSN50 v2 S31 LoRaWAN Outdoor Temperature & Humidity Sensor

LSN50 v2 S31 LoRaWAN Outdoor Temperature & Humidity Sensor


The Dragino LSN50v2-S31 is a LoRaWAN Temperature and Humidity Sensor for Internet of Things solutions. It is used to measure the surrounding environment temperature and relative air humidity precisely, and then upload – via a LoRaWAN gateway – to any IoT server via LoRaWAN wireless protocol.

Each LSN50v2-S31 is pre-loaded with a set of unique keys for LoRaWAN registration. Register these keys to any LoRaWAN server and the sensor will auto connect after power on.

SKU: LSN50 v2 S31 Categories: , ,

Product Description

The temperature & humidity sensor used in the LSN50 v2 S31 is the Sensirion SHT31, which has a fully calibrated, linearized, and temperature compensated digital output. It provides a strong reliability
and long-term stability. The SHT31 is fixed in a waterproof anti-condensation casing for long term use.

The LSN50 v2 S31 supports a temperature and humidity alarm feature, allowing the user to set a temperature alarm for immediate notification.

The LSN50 v2 S31 is powered by an 8500mAh Li-SOCI2 battery. It is designed for long term use up to 10 years. (Battery life depends on the usage environment and update period. Please check the related Power Analysis report)


  • LoRaWAN v1.0.3 Class A
  • Ultra low power consumption
  • External 3m SHT31 probe
  • Measurement range: -40°C ~ 80°C
  • Temperature alarm
  • Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
  • AT Commands to change parameters
  • Uplink on periodically or Interrupt
  • Downlink to change configure


  • Wireless Alarm and Security Systems
  • Home and Building Automation
  • Automated Meter Reading
  • Industrial Monitoring and Control
  • Long range Irrigation Systems

Micro Controller:

  • MCU: STM32L072CZT6
  • Flash:192KB
  • RAM:20KB
  • Clock Speed: 32Mhz

Common DC Characteristics:

  • Supply Voltage: built in 8500mAh Li-SOCI2 battery
  • Operating Temperature: -40 ~ 85°C

Temperature Sensor:

  • Range: -40 to + 80°C
  • Accuracy: ±0.2 @ 0-90 °C
  • Resolution: 0.01°C
  • Long Term Shift: <0.03 °C/yr

Humidity Sensor:

  • Range: 0 ~ 99.9% RH
  • Accuracy: ± 2%RH ( 0 ~ 100%RH)
  • Resolution: 0.01% RH
  • Long Term Shift: <0.25 %RH/yr

LoRa Spec:

  • Frequency Range: Band 1 (HF): 862 ~ 1020 Mhz
  • 168 dB maximum link budget
  • High sensitivity: down to -148 dBm
  • Bullet-proof front end: IIP3 = -12.5 dBm
  • Excellent blocking immunity
  • Built-in bit synchronizer for clock recovery
  • Preamble detection
  • 127 dB Dynamic Range RSSI
  • Automatic RF Sense and CAD with ultra-fast AFC
  • LoRaWAN 1.0.3 Specification

Power Consumption

  • Sleeping Mode: 20uA
  • LoRaWAN Transmit Mode: 125mA @ 20dBm 44mA @ 14dBm

Additional Information

Weight .8 lbs
Dimensions 7.5 × 4.75 × 2.25 in

EU433, CN470, EU868, IN865, KR920, AS923, AU915, US915

Salt Lake City Office

Wovyn, L.L.C.
175 West 200 South
Suite #100 (Garden Level)
Salt Lake City, UT 84101