P-NUCLEO-LRWAN1
STM32 Nucleo pack for LoRa
®
technology
and high-performance FSK/OOK RF transceiver modem
Data brief
Features
•
Ultra-low-power STM32L0 Series MCU, ARM
®
Cortex
®
-M0+ based with 192 Kbytes of Flash
memory, 20 Kbytes of RAM, 6 Kbytes of
EEPROM, LCD, crystal-less USB, T-RNG,
PCROP
•
157 dB maximum link budget
•
+20 dBm, 100 mW constant RF output versus
Vsupply
•
+14 dBm high efficiency PA
•
Programmable bit rate up to 300 kbps
•
High sensitivity: down to -137 dBm
•
Bullet-proof front end: IIP3 = -12.5 dBm
•
89 dB blocking immunity
•
Low RX current of 10 mA, 200 nA register
retention
•
Fully integrated synthesizer with a resolution of
61 Hz
•
FSK, GFSK, MSK, GMSK, LoRa
®
and OOK
modulations
•
Built-in bit synchronizer for clock recovery
•
Sync word recognition
•
Preamble detection
•
127 dB+ dynamic range RSSI
•
Built-in temperature sensor and low-battery
indicator 1.65 V to 3.6 V power supply
1. Picture is not contractual.
Description
The STM32 Nucleo pack for LoRa
®
technology
and high-performance FSK/OOK RF transceiver
modem (P-NUCLEO-LRWAN1) is a development
tool to learn and develop solutions based on
LoRa
®
and FSK/OOK technologies.
This tool, in association with the certified
embedded software solution (I-CUBE-LRWAN),
provides the means to set up a complete
LoRaWAN
™
node compliant with class A, based
on the Semtech SX1272MB2xAS LoRa
®
extension board. To control the LoRa
®
extension
board, the pack comes with a NUCLEO-L073RZ
board based on the ultra-low-power, 32-bit
STM32L0 based on ARM
®
Cortex
®
-M0
microcontroller. The I-CUBE-LRWAN is
LoRaWAN
™
class A certified.
This pack is the perfect fit for any countries with
868 MHz or 915 ISM frequency bands.
November 2016
DocID029505 Rev 2
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www.st.com
For further information contact your local STMicroelectronics sales office.
P-NUCLEO-LRWAN1 system architecture
P-NUCLEO-LRWAN1
P-NUCLEO-LRWAN1 system architecture
The STM32 Nucleo pack for LoRa
®
technology and high-performance FSK/OOK RF
transceiver modem is composed of two main blocks (see
Figure 1: P-NUCLEO-LRWAN1
system architecture):
•
•
The SX1272MB2xAS LoRa
®
extension board
A control block: NUCLEO-L073RZ MCU board
Figure 1. P-NUCLEO-LRWAN1 system architecture
Pass through
Pass through
DIO0
DIO1
DIO2
DIO3
Pass through
Pass through
Pass through
Pass through
NSS
MOSI
MISO
SCK
GND
Pass through
Pass through
Pass through
Pass through
Pass through
Pass through
Pass through
Pass through
RESET
Pass through
GND
GND
Pass through
3.3V
Pass through
Pass through
Pass through
NUCLEO-L073RZ
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P-NUCLEO-LRWAN1
P-NUCLEO-LRWAN1 system architecture
The SX1272MB2xAS expansion board includes:
•
The SX1272 transceiver:
The SX1272 transceiver features the LoRa
®
long-range modem that provides an ultra-long
range spread spectrum communication and a high-interference immunity whilst minimizing
the current consumption.
Using the Semtech patented LoRa
®
modulation technique, the SX1272/73 transceivers can
achieve a sensitivity of over -137 dBm using a low-cost crystal and bill of materials. The high
sensitivity combined with the integrated +20 dBm power amplifier makes the link budget
optimal for any application requiring range or robustness. The LoRa
®
modulation also
provides significant advantages in both blocking and selectivity, over the conventional
modulation techniques, solving the traditional design compromise between the range, the
interference immunity and the energy consumption. These transceivers also support the
high performance (G)FSK modes for systems including WMBus, IEEE802.15.4g. The
SX1272/73 transceivers deliver an exceptional phase noise, a selectivity, a receiver linearity
and IIP3 for significantly lower current consumption than the competing devices.
•
The LoRa
®
modulation:
The LoRa
®
Semtech proprietary modulation is a spread-spectrum technique that uses
wideband linear frequency modulated pulses to encode information, whose frequency
increases or decreases over a certain amount of time. Like with other spread-spectrum
modulation techniques, the LoRa
®
modulation uses the entire channel bandwidth to
broadcast a signal, making it robust to the channel noise. In addition, because the LoRa
®
modulation uses a broad band of the spectrum, the signal is resistant to long term relative
frequency error, multi-path, fading and doppler effects.
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P-NUCLEO-LRWAN1 system architecture
P-NUCLEO-LRWAN1
The SX1272 transceiver has the following features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
157 dB maximum link budget
+20 dBm,100 mW constant RF output versus Vsupply
+14 dBm high efficiency PA
Programmable bit rate up to 300 kbps
High sensitivity: down to -137 dBm
Bullet-proof front end: IIP3 = -12.5 dBm
89 dB blocking immunity
Low RX current of 10 mA, 200 nA register retention
Fully integrated synthesizer with a resolution of 61 Hz
FSK, GFSK, MSK, GMSK, LoRa
®
and OOK modulations
Built-in bit synchronizer for clock recovery
Sync word recognition
Preamble detection
127 dB+ dynamic range RSSI
Automatic RF Sense with ultra-fast AFC
Packet engine up to 64 bytes with CRC
Built-in temperature sensor and low battery indicator
The NUCLEO-L073RZ board includes:
•
An STM32L073RZT6 ultra-low-power 32-bit microcontroller based on ARM
®
Cortex
®
-
M0+ with 192 Kbytes of Flash memory, 20 Kbytes of SRAM, 6 Kbytes of true
EEPROM, USB 2.0 full speed and crystal-less data interface, a LCD driver, 2x 12-bit
DAC and a T-RNG in a LQFP64 package
Two types of extension resources:
–
–
•
•
–
–
–
•
•
•
–
Arduino
™
Uno V3 connectivity
ST morpho extension pin headers for full access to all STM32 I/Os
Selection-mode switch to use the pack as a standalone ST-LINK/V2-1
USB V
BUS
on Type-B connector or external source
Power management access point
USB communication (LD1), user LED (LD2), power LED (LD3)
•
On-board ST-LINK/V2-1 debugger/programmer with SWD connector
Flexible board power supply:
Three LEDs:
Two push-buttons: USER and RESET
USB re-enumeration capability: three different interfaces supported on USB:
–
–
–
Virtual COM port
Mass storage
Debug port
•
Supported by a wide choice of Integrated Development Environments (IDEs) including
IAR
™
, ARM
®
Keil
®
, GCC-based IDEs
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P-NUCLEO-LRWAN1
Revision history
Revision history
Table 1. Document revision history
Date
12-Aug-2016
29-Nov-2016
Revision
1
2
Initial version.
Updated
Figure 1: P-NUCLEO-LRWAN1 system
architecture.
Changes
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