The Dragino LSN50v2-D20 is a LoRaWAN Temperature Sensor for Internet of Things solution. It can be used to measure the temperature of air, liquid or object, and then upload to IoT server via LoRaWAN wireless protocol.

The temperature sensor used in LSN50v2-D20 is DS18B20, which can measure -55°C ~ 125°C with accuracy ±0.5°C (max ±2.0 °C). The sensor cable is made by Silica Gel, and the connection between metal probe and cable is double compress for waterproof, moisture-proof and anti-rust for long term usage. LSN50v2-D20 supports temperature alarm feature, user can set temperature alarm for instant notice.

LSN50v2-D20 is powered by, it is designed for long term use up to 10 years. (Actually Battery life depends on the use environment, update period. Please check related Power Analyze report).

Each LSN50v2-D20 is pre-load with a set of unique keys for LoRaWAN registration, register these keys to local LoRaWAN server and it will auto connect after power on.

Features:

✓ LoRaWAN v1.0.3 Class A

✓ Ultra-low power consumption

✓ External DS18B20 Probe (default 2meters)

✓ Measure range -55°C ~ 125°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

Specifications

Micro Controller:

➢ MCU: STM32L072CZT6

➢ Flash:192KB

➢ RAM:20KB

➢ EEPROM: 6KB

➢ Clock Speed: 32Mhz

Common DC Characteristics:

➢ Supply Voltage: built in 8500mAh Li-SOCI2 battery

➢ Operating Temperature: -40 ~ 85°C

Temperature Sensor:

➢ Range: -55 to + 125°C

➢ Accuracy ±0.5°C (max ±2.0 °C).

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

 Applications

✓ Wireless Alarm and Security Systems

✓ Home and Building Automation

✓ Industrial Monitoring and Control

✓ Long range Irrigation Systems.

Download

Datasheet_LSN50v2-D20_LoRaWAN_Temperature_Sensor.pdf

LSN50v2-D20_LoRaWAN_Temperature_Manual

Decoder

Firmware

ER26500_Datasheet-EN.pdf

ER26500_SPC1520_Drawing.pdf