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Getting started with the X-NUCLEO-S2915A1 Sub-1 GHz 915 MHz
RF expansion board based on S2-LP radio for STM32 Nucleo
Introduction
The X-NUCLEO-S915A1 expansion board is based on the S2-LP radio and
operates in the 915 MHz ISM frequency band.
The expansion board is compatible with ST morpho and Arduino UNO R3
connectors.
The X-NUCLEO-S2915A1 interfaces with the STM32 Nucleo microcontroller
via SPI connections and GPIO pins. You can change some of the GPIOs by
mounting or removing the resistors.
The boards are equipped with the following features:
On-board S2-LP, sub-1 GHz transceiver device
•
SPI EEPROM for saving parameters
•
860 to 930 MHz RF Front-End Module(power amplifier)
•
LED for user interface
•
Jumper at 3V3 for checking the current consumption of the expansion
•
board
October 2018
Figure 1. Sub-1 GHz expansion board based on S2-LP for STM32
User manual
www.st.com
1/21
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Summary of Contents for ST X-NUCLEO-S915A1
- Page 1 RF expansion board based on S2-LP radio for STM32 Nucleo Introduction The X-NUCLEO-S915A1 expansion board is based on the S2-LP radio and operates in the 915 MHz ISM frequency band. The expansion board is compatible with ST morpho and Arduino UNO R3 connectors.
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Page 2: Table Of Contents
User Manual Contents Description ....................3 Typical applications ..................3 Abbreviations ....................4 Getting started ....................5 Overview ....................... 5 Hardware and software requirements ............6 Board setup ....................7 Hardware description and configuration ..........8 Interconnection details ................... 8 SPI and GPIO connection options ..............9 Current measurement .................. -
Page 3: Description
Point-to-point communication protocol demo • 6LoWPAN applications • SigFox Communication • Please refer to the data brief for the firmware, available on www.st.com. Users can develop other applications for evaluating the devices. Some of these applications are: SigFox Communication • Automatic meter reading •... -
Page 4: Abbreviations
User Manual Abbreviations Table 2. Abbreviation Term Meaning Automatic meter reading EEPROM Electrically erasable programmable read only memory Giga Hertz Graphical user interface Light emitting diode Microcontroller unit Point-to-point communication Radio frequency communication Serial peripheral interface Universal serial bus wM-Bus Wireless metering bus Wireless sensors network To Be Done... -
Page 5: Getting Started
Getting started X-NUCLEO-S2868A1 Getting started This section describes the hardware requirements for the X-NUCLEO- S2915A1 evaluation boards. Overview The X-NUCLEO-S2915A1 main features are: • Based on S2-LP radio • S2-LP narrow band ultra-low power sub-1 GHz transceiver tuned for 860 - 940 MHz frequency band •... -
Page 6: Hardware And Software Requirements
User Manual • Automatic meter reading • Home and building automation • WSN • Industrial monitoring and control • Wireless fire and security alarm systems Hardware and software requirements To use STM32 Nucleo development boards with the X-NUCLEO-S2915A1 expansion board, connect the boards as shown below. Figure 2. -
Page 7: Board Setup
Getting started X-NUCLEO-S2868A1 • a type A USB to mini-B USB cable to connect the STM32 Nucleo board to the PC/laptop • 128 MB of RAM • Approximately 40 MB of hard disk space for the firmware • Approximately 15 MB of hard disk space for the wM-Bus GUI The use of the wM-Bus concentrator with the GUI requires additional boards to be connected to the PC. -
Page 8: Hardware Description And Configuration
User Manual Hardware description and configuration This section describes the X-NUCLEO-S2915A1 features and provides information which could be useful to understand the board schematics. Interconnection details The X-NUCLEO-S2915A1 expansion board and the NUCLEO-F401RE or NUCLEO-L152RE board connection details are listed in the table below. Table 3. -
Page 9: Spi And Gpio Connection Options
Getting started X-NUCLEO-S2868A1 Table 4. Right connector connection details Right connector CN5 Digital CN9 Digital Note: * = Optional connection SPI and GPIO connection options The SPI and GPIO connection options between the STM32 and S2-LP can be used to enable different configurations in case a signal conflict occurs when using other expansion boards. - Page 10 User Manual Table 5. S2-LP interface (optional) with Nucleo board Default STM32 S2-LP signal Optional STM32 port port To use optional connection mount R9, demount R13 To use optional connection mount R6, demount R11 To use optional connection mount R7, demount R19 PB10 To use optional connection mount R18, demount R10 To use the optional connections, modify the firmware on the basis of the...
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Page 11: Current Measurement
Getting started X-NUCLEO-S2868A1 Current measurement To monitor the power consumption of the entire S2-LP X-NUCLEO-S2915A1 board, jumper J1 can be used. Connect an ammeter probe between pins 1 and 2 of the connector for measurements. X-NUCLEO-S2915A1 component placement details shows the component placement on the S2-LP expansion X- Figure 3 NUCLEO-S2915A1 board. -
Page 12: Component Description
User Manual Component description This section describes the devices on the board. S2-LP Radio The X-NUCLEO-S2915A1 expansion board is based on the S2-LP standalone RF transceiver. It operates in the 915 MHz ISM frequency band and wireless M-Bus. Table 7. S2-LP details Features Description Order code... -
Page 13: Formal Notices Required By The U.s. Federal Communications Commission ("Fcc")
Getting started X-NUCLEO-S2868A1 Formal Notices Required by the U.S. Federal Communications Commission (“FCC”) (TBD) FCC NOTICE: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. -
Page 14: Formal Notices Required By The Industry Canada ("Ic")
User Manual Formal Notices Required by the Industry Canada (“IC”) Innovation, Science and Economic Development Canada Compliance - This device complies with Innovation, Science and Economic Development RSS standards. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. - Page 15 Getting started X-NUCLEO-S2868A1 This radio transmitter 8976C-S2915A1 has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device.
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Page 16: Oem Integration Instructions
User Manual OEM Integration Instructions. This device is intended only for OEM integrators under the following conditions： The LMA (Limited Modular Approval) is applied to this module because of below two concerns: 1. There is no shied case, so the shielding policy is not complied with. 2. - Page 17 ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
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