Note:
By default, USART1 (PA9/PA10) is used in the NUCLEO-L073RZ board to control the RHF0M003-LF20 modem.
Optionally, it is possible to use USART2 (PA2/PA3) via jumper resistor on the LRWAN_NS1. Refer to its user
manual. If USART2 (PA2/PA3) is used to control the modem, the following solder bridge on the Nucleo board
must be configured accordingly:
•
SB62 and SB63 are closed
•
SB13 and SB14 are opened to disconnect the STM32 UART from ST-LINK
Refer to
in the USART Communication section for more details.
2.3
Gateway hardware overview
The
LoRaWAN
®
has the following key features:
Gateway main board
•
development board (from STMicroelectronics)
–
Arm
®
Cortex
®
-M7 high-performance MCU at 216 MHz with 1-Mbyte Flash memory
and 320-Kbyte SRAM
–
3 user LEDs
–
1 user and 1 reset push-buttons
–
Ethernet compliant with IEEE-802.3-2002
–
USB OTG Full Speed or device only
–
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
◦
Micro-AB USB connector for the ST-LINK
◦
ST Zio expansion connector including ARDUINO
®
Uno V3
◦
ST morpho extension pin headers for full access to all STM32 I/Os
◦
USB with Micro-AB
◦
Ethernet RJ45
Gateway expansion board
•
LRWAN_GS_LF1 LoRa
®
LF band (433/470 MHz) gateway expansion board (from RisingHF)
–
Semtech SX1301/SX1255 LF baseband data concentrator and transceiver
◦
Automatically adaptive to spreading factor from SF12 to SF7 in each of 8 channels
◦
High sensitivity down to -140 dBm at 300 bit/s
◦
6 dBm output power
◦
Support LoRaWAN
®
protocol Class A and Class C
◦
Support Semtech packet forwarder
◦
Support DNS and NTP
UM2587
Gateway hardware overview
UM2587
-
Rev 3
page 14/55
