2.2
Sensor hardware overview
The
LoRaWAN
®
sensor device has the following key features:
Main board
•
development board (from STMicroelectronics)
–
®
Cortex
®
-M0+ ultra-low-power MCU at 32 MHz with 192-Kbyte Flash memory,
20-Kbyte SRAM and 6-Kbyte data EEPROM
–
1 user LED
–
1 user and 1 reset push-buttons
–
32.768 kHz crystal oscillator
–
On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage,
Virtual COM port, and debug port
–
Board connectors
◦
Mini-B USB connector for the ST-LINK
◦
ARDUINO
®
Uno V3 expansion connector
◦
ST morpho extension pin headers for full access to all STM32 I/Os
RF module and sensor expansion board
•
LRWAN_NS1 LoRa
®
LF band (433/470 MHz) sensor expansion board (from RisingHF)
–
RisingHF RHF0M003-LF20 low-power long-range LoRaWAN
®
module, based on the STM32L071
MCU and Semtech SX1278 transceiver
◦
High sensitivity down to -137 dBm
◦
14 dBm to 20 dBm output power
–
temperature and humidity sensor
–
pressure sensor
–
accelerometer and gyroscope sensor
–
magnetometer
UM2587
Sensor hardware overview
UM2587
-
Rev 3
page 11/55