Users Manual

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LSN50 LoRa Sensor Node User Manual 5 / 55
1.2 Specifications
Micro Controller:
● STM32L072CZT6 MCU
● MCU: STM32L072CZT6
● Flash: 192KB
● RAM: 20KB
● EEPROM: 6KB
● Clock Speed: 32Mhz
Common DC Characteristics:
● Supply Voltage: 2.1v ~ 3.6v
● Operating Temperature: -40 ~ 85°C
● I/O pins: Refer to STM32L072 datasheet
LoRa Spec:
● Frequency Range,
○ Band 1 (HF): 902 ~ 928Mhz
● Programmable bit rate up to 300 kbps.
● High sensitivity: down to -148 dBm.
● Bullet-proof front end: IIP3 = -12.5 dBm.
● Excellent blocking immunity.
● Low RX current of 10.3 mA, 200 nA register retention.
● Fully integrated synthesizer with a resolution of 61 Hz.
● FSK modulation.
● Built-in bit synchronizer for clock recovery.
● Preamble detection.
● 127 dB Dynamic Range RSSI.
● Automatic RF Sense and CAD with ultra-fast AFC.
● Packet engine up to 256 bytes with CRC.
● LoRaWAN 1.0.2 Specification
Battery:
● Li/SOCI2 un-chargeable battery
● Capacity: 4000mAh
● Self Discharge: <1% / Year @ 25°C
● Max continuously current: 130mA
● Max boost current: 2A, 1 second
Power Consumption
● STOP Mode: 2.7uA @ 3.3v
● LoRa Transmit Mode: 125mA @ 20dBm 44mA @ 14dBm