LSN50 — Waterproof Long Range Wireless LoRa Sensor Node

LSN50 LoRa Sensor Node Wireless Part is based on SX1276/SX1278 allows the user to send data and reach extremely long ranges at low data rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.

LSN50  MCU part uses STM32l0x chip from ST, STML0x is the ultra-low-power STM32L072xx microcontrollers incorporate the connectivity power of the universal serial bus (USB 2.0 crystal-less) with the high-performance ARM® Cortex®-M0+ 32-bit RISC core operating at a 32 MHz frequency, a memory protection unit (MPU), high-speed embedded memories (192 Kbytes of Flash program memory, 6 Kbytes of data EEPROM and 20 Kbytes of RAM) plus an extensive range of
enhanced I/Os and peripherals.

LM502 is an open-source product, it is based on the STM32Cube HAL drivers, and lots of libraries can be found on the ST site for rapid development.

• STM32L072CZT6 MCU
• SX1276/78 LoRa Wireless Modem
• Pre-load with ISP bootloader
• I2C,LPUSART1,USB
• 18 x Digital I/Os
• 2 x 12bit ADC; 1 x 12bit DAC
• MCU wake up by UART or Interrupt
• LoRa™ Modem
• Preamble detection
• Baud rate configurable
• LoRaWAN 1.0.2 Specification
• Software base on STM32Cube HAL drivers
• Open source hardware / software
• Available Band:433/868/915/920 Mhz
• IP66 Waterproof Enclosure
• Ultra Low Power consumption
• AT Commands to setup parameters
• 4000mAh Battery for Long term use

Applications:

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

LoRa Spec

• 168 dB maximum link budget.
• +20 dBm – 100 mW constant RF output vs.
• +14 dBm high efficiency PA.
• 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, GFSK, MSK, GMSK, LoRaTM and OOK 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.
• Built-in temperature sensor and low battery indicator.

MCU Spec

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

Absolute Maximum Ratings:

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

Common DC Characteristics:

• Supply Voltage: 1.8v ~ 3.6v
• Operating Tempature: -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 unchargable battery
• Capacity: 4000mAh
• Self Discharge: <1% / Year @ 25°C
• Max continuously current: 130mA
• Max boost current: 2A, 1 second

Package Includes:

• 1 x LSN50 module

Dimensions and Weight:

• Weight: 140g
• Dimension: 65 x 50 x 50 mm