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Semtech SX1272 User Manual

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Summary of Contents for Semtech SX1272

  • Page 1 Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components to meet their specific needs.
  • Page 2 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS SX1272 Development Kit USER GUIDE Revision 1 – June 2013 Page 1 of 48 www.semtech.com ©2013 Semtech Corporation...

  • Page 3: Table Of Contents

    … perform Continuous transmission and Reception in LoRa ............. 44 … Log the Transmitted or Received packets ................45 … perform a CW or PN9 Tx test on the SX1272 ................ 46 … check the frequency accuracy of the SX1272 module ............46 Troubleshooting ...........................

  • Page 4: Index Of Figures

    USER GUIDE WIRELESS & SENSING PRODUCTS Index of Figures Figure 1: SX1272 Development Kit (SX1272DVK1BAS - 868MHz version) ..........5 Figure 2: Eiger platform description ......................10 Figure 3: Sx1272 Module Schematic ......................11 Figure 4: Connect both USB ports to use the SX1272SKA ................ 24 Figure 5: SX1272 window organization ......................

  • Page 5: Preamble

    902-928 MHz North American ISM bands. Coupled with a link budget in excess of 135 dB in FSK in excess of 155 dB in LoRa, the SX1272 really offers the possibility of two modems in one single package. The SX1272 complies with both ETSI and FCC regulatory requirements and is available in a 5x5 mm QFN 28 lead free package.

  • Page 6: Getting Started

    2 x SX1272 modules  2 x ½ wave dipole antennas  2 x Mini-USB cables  Insert sheet Figure 1: SX1272 Development Kit (SX1272DVK1BAS - 868MHz version) Revision 1 – June 2013 Page 5 of 48 www.semtech.com ©2013 Semtech Corporation...

  • Page 7: Ordering Information

    USER GUIDE WIRELESS & SENSING PRODUCTS 3.2 Ordering information Each of part of the SX1272 Evaluation kit can be ordered as a single entity or in a whole package. When ordering, please refer to the following parts numbers: SX1272DVK1BAS SX1272 Development Kit (868MHz version)
  • Page 8 STM32F407 Module STM32F103 Module The upgrader then needs to know which version of the SX1272 is used with the Eiger platform. Most users should have the Version 2 of the device. In case of doubt, please contact your Semtech representative.
  • Page 9 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS If the Eiger platform is not powered up, is wrongly connected or if the RLink drivers are not installed, the following message will be displayed on the screen: In this situation, the user need to make sure the device is correctly powered and turned on. Please, refer to section 4.1 of this document for more information.
  • Page 10 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS This is what the full upgrader should look like at the end of the software update. Once the software has been upgraded, it is recommended to reset all the internal settings on the Eiger platform.

  • Page 11: Eiger Platform Presentation

    4 Eiger Platform Presentation 4.1 Platform Description The Eiger platform is intended to enable a quick and easy range test of the sx1272 module. Here most of the modem parameters are pre-configured and the user only needs to set some RF parameters.

  • Page 12: Sx1272 Module Hardware

    The SX1272SKA is a USB based evaluation software designed to allow simple and easy evaluation of the suitability of the SX1272 for a given application. The low component count reference design implemented in the SX1272RF1xAS reference board is illustrated below in Figure 3.

  • Page 13: Eiger Platform For Per Testing

    SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5 Eiger platform for PER Testing 5.1 Menu Description The Eiger menu is organized around the touch screen which allows the user to set on the fly a limited number of parameters. We will here describe each menu window so that the user can quickly start doing PER testing.

  • Page 14: System Window

    SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.1 System Window Temperature Reset the Eiger platform Settings Get the battery status Access the bootloader menu Information on the firmware Return to Home Screen 5.2.1.1 Settings In case of miss-operation or to simply reset the Eiger module into a known state, it is possible the reset the touch screen parameters or to reset the device parameters to their default parameters.
  • Page 15 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.1.2 Battery Indicates the battery state Indicates the battery level Indicates the voltage delivered by the battery 5.2.1.3 Bootloader Reboot the system Update the firmware through an SD card Reset touch screen calibration 5.2.1.4...

  • Page 16: Per Demo Window

    SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.2 PER Demo Window Set the device as Receiver for the PER test Set the device as Transmitter for the PER test Set the RF Settings for the PER test The PER Demo menu is the core of the Eiger platform testing. The menu is divided in three main areas, Tx, Rx and Settings.
  • Page 17 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.2.1 PER Settings Menu running in FSK mode For a given modulation, there is only a limited set of parameters that can be set by the user. Most of the parameters are set automatically in the software to keep the interface user friendly.
  • Page 18 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.2.2 PER Packet Settings Menu running in FSK mode Set Device ID Enable or Disable payload CRC Set the payload size (in Bytes): 9, 16, 24, 48 or 64 In FSK mode, the payload is built in the following way:...
  • Page 19 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.2.3 PER Settings Menu running in LoRa mode Set the RF Band (868MHz or 915MHz) Set the RF frequency (within the band) Set the Spreading factor: 6, 7, 8, 9, 10,...
  • Page 20 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.2.4 PER Packet Settings Menu running in LoRa mode Set Device ID Enable or Disable payload CRC Set the payload size (in Bytes): 9, 16, 24, 48 or 64 Enable or Disable Low Datarate...
  • Page 21 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.2.5 PER TX Mode Once the RF parameters are set, putting the Eiger module in TX mode will initiate the packet transmission. The TX window displays the RF parameters and the number of packet sent since the beginning of the test.
  • Page 22 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.2.6 PER RX Mode PER Rx window in Lora mode: Indicate the SNR Indicate the RSSI Packet indicator Number of correct packet received Number of packet missed Number of non PER packet...
  • Page 23 SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS PER Rx window in FSK mode: Indicate the RSSI Packet indicator Number of correct packet received Number of packet missed Number of non PER packet received Reset the PER counter Revision 1 – June 2013 Page 22 of 48 www.semtech.com...

  • Page 24: Per Rx Bar-Graph

    SX1272 Development Kit USER GUIDE WIRELESS & SENSING PRODUCTS 5.2.3 PER Rx Bar-graph In Rx mode, a bar-graph indicates the distribution of the error over time. This is especially useful to detect the cause of the error, whether a burst of noise in the frequency band or if the device in in the limit of reception range.

  • Page 25: Sx1272Ska Software Description

    SX1272. 6.1 SX1272SKA Quick start Guide It is recommended that this user guide is read in conjunction with the SX1272 datasheet. 1. Plug the Eiger Platform USB ports to the computer (one USB is used to power the platform while the other USB is used for communication).

  • Page 26: Figure 5: Sx1272 Window Organization

    SX1272 Chipset Version Radio config file currently loaded Figure 5: SX1272 window organization While this approach has limitation on testing the system capability of the device, it allows the user to thoroughly evaluate the device from the radio point of view This chapter is presenting the various windows and field that controls the radio operations.