DRAGINO · Sensor · LoRa · LoRa Sensor Node · LSN50-EU868-12

DRAGINO LSN50-EU868-12 LoRa Sensor Node

overview

LSN50 LoRa Sensor Node is a long range LoRa sensor node. It is designed for outdoor use and powered by Li/SOCl2 battery for long-term use.LSN50 is designed to make it easier for developers to quickly deploy LoRa and IoT solutions at industrial level. It helps users turn the idea into a practical application and make the Internet of Things a reality. It is easy to program, build and connect your things anywhere.

The wireless part of LSN50 is based on SX1276/SX1278 and allows the user to send data and achieve extremely long ranges at low data rates.It provides ultra-long range spread spectrum communication with high interference immunity and minimal power consumption.It targets professional wireless sensor network applications such as irrigation systems, smart metering systems, smart cities, smartphone detection, building automation, etc.

The LSN50 MCU part uses ST's STM32l0x chip, STML0x is the STM32L072xx ultra-low-power microcontroller, which combines the connectivity performance of the universal serial bus (USB 2.0 crystal-free) with the high-performance 32-bit RISC core ARM® Cortex®-M0+ operating at a frequency of 32 MHz, a memory protection unit (MPU), high-speed embedded memories (192 KByte flash program memory, 6 KByte data EEPROM and 20 KByte RAM) and a comprehensive range of
advanced I/Os and peripherals.
LSN50 is an open source product, it is based on the STM32Cube HAL drivers and many libraries can be found on the ST site for rapid development.

Characteristics

• STM32L072CZT6 MCU
• SX1276/78 LoRa Wireless Modem
• Preloading with ISP bootloader
• I2C,LPUSART1,USB
• 18 x Digital I/Os
• 2 x 12bit ADC 1 x 12bit DAC
• Waking up the MCU via UART or interrupt
• LoRa™ Modem
• Preamble detection
• Baud rate configurable
• LoRaWAN 1.0.2 Specification
• Software based on STM32Cube HAL drivers
• Open source hardware/software
• Available band:433/868/915/920 Mhz
• IP66 Waterproof housing
• Ultra-low power consumption
• AT commands for setting parameters
• 4000mAh battery for long-term use

Applications

• Wireless alarm and security systems
• Home and building automation
• Automatic meter reading
• Industrial monitoring and control
• Long distance irrigation systems, etc.

LoRa Specifications

• 168 dB maximum link budget.
• +20 dBm - 100 mW constant RF output power compared to
• +14 dBm high efficiency PA.
• Programmable bitrate up to 300 kbps.
• High sensitivity: up to -148 dBm.
• Bulletproof front end: IIP3 = -12.5 dBm.
• Excellent blocking resistance.
• Low RX current of 10.3 mA, 200 nA register hold.
• Fully integrated synthesizer with a resolution of 61 Hz.
• FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
• Built-in bit synchronizer for clock recovery.
• Preamble detection.
• 127 dB dynamic range RSSI.
• Automatic RF detection and CAD with ultra-fast AFC.
• Packet engine up to 256 bytes with CRC.
• Built-in temperature sensor and low battery indicator.

MUC Specifications

• Microcontroller: STM32L072CZT6
• Flash:192KB
• SRAM:20KB
• EEPROM:6KB
• Clock Speed: 32Mhz

Absolute Maximum Ratings

• VCC: 0.5v ~ 3.9v
• Operating temperature: -40 ~ 85°C
• I/O pins: 0.5v ~ VCC+0.5V

Common DC Characteristics

• Supply Voltage: 1.8v ~ 3.6v
• Operating temperature: -40 ~ 85°C
• I/O pins: Refer STM32L072CZT6 datasheet

Power Consumption

• STOP Mode: 2.7μA @ 3.3v
• RX Mode: 7.2mA
• TX Mode: 125mA@ 20dbm

Battery

• Li/SOCI2 rechargeable battery
• Capacity: 4000mAh
• Self-Discharge: <1% / Year @ 25°C
• Max continuous current: 130mA
• Max boost current: 2A, 1 second

scope of delivery

• 1 x 3.5mm Jack to 2x 3.5mm Jack