User Manual

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LSN50V2-S31 LoRaWAN Outdoor Temperature & Humidity Sensor 5 / 22
1.2 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: -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