SX1272 Development Kit
USER GUIDE
WIRELESS & SENSING PRODUCTS
SX1272 Development Kit
USER GUIDE
Revision 1 – June 2013
©2013 Semtech Corporation
Page 1 of 48
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SX1272 Development Kit
USER GUIDE
WIRELESS & SENSING PRODUCTS
Table of Contents
Table of Contents .......................................................................................................................................... 2
Index of Figures ............................................................................................................................................ 3
1 Preamble ................................................................................................................................................ 4
2 Introduction ............................................................................................................................................ 4
3 Getting Started ....................................................................................................................................... 5
3.1
Evaluation Kit Contents ................................................................................................................. 5
3.2
Ordering information ..................................................................................................................... 6
3.3
Updating the firmware ................................................................................................................... 6
4 Eiger Platform Presentation ................................................................................................................. 10
4.1
Platform Description .................................................................................................................... 10
4.2
SX1272 Module Hardware .......................................................................................................... 11
5 Eiger platform for PER Testing ............................................................................................................ 12
5.1
Menu Description ........................................................................................................................ 12
5.2
Using the Eiger platform .............................................................................................................. 12
5.2.1 System Window....................................................................................................................... 13
5.2.2 PER Demo Window................................................................................................................. 15
5.2.3 PER Rx Bar-graph................................................................................................................... 23
6 SX1272SKA Software Description ....................................................................................................... 24
6.1
SX1272SKA Quick start Guide ................................................................................................... 24
6.2
LoRa Mode .................................................................................................................................. 27
6.2.1 LoRa Menu .............................................................................................................................. 27
6.2.2 LoRa Common Window .......................................................................................................... 28
6.2.3 LoRa Parameters Window ...................................................................................................... 29
6.3
FSK Mode ................................................................................................................................... 30
6.3.1 FSK Menu ............................................................................................................................... 30
6.3.2 Common window ..................................................................................................................... 31
6.3.3 Transmitter window ................................................................................................................. 32
6.3.4 Receiver window ..................................................................................................................... 33
6.3.5 IRQ and Map window .............................................................................................................. 34
6.3.6 Packet Handler window ........................................................................................................... 35
6.3.7 Sequencer window .................................................................................................................. 36
6.3.8 Temperature window ............................................................................................................... 37
7 How to... ............................................................................................................................................... 38
7.1
… perform a simple transmission / reception in LoRa ................................................................ 38
7.2
… perform a simple transmission / reception in FSK .................................................................. 40
7.3
… perform Continuous transmission and Reception in LoRa ..................................................... 44
7.4
… Log the Transmitted or Received packets .............................................................................. 45
7.5
… perform a CW or PN9 Tx test on the SX1272 ........................................................................ 46
7.6
… check the frequency accuracy of the SX1272 module ........................................................... 46
8 Troubleshooting ................................................................................................................................... 47
8.1
The Eiger platform indicates very high PER even in short range ............................................... 47
8.2
The communication range in Lora is very poor ........................................................................... 47
8.3
The SX1272SKA do not detect the device through the USB ...................................................... 47
8.4
The Eiger platform does not seem to work anymore .................................................................. 47
8.5
The Eiger platform touch screen is not accurate ........................................................................ 47
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SX1272 Development Kit
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 ...................................................................................................... 25
Figure 6: Register table ............................................................................................................................... 26
Figure 7: SX1272SKA Boot-up windows .................................................................................................... 28
Figure 8: LoRa Radio parameters window .................................................................................................. 29
Figure 9: FSK window structure .................................................................................................................. 30
Figure 10: FSK Common window ............................................................................................................... 31
Figure 11: FSK Transmitter window ............................................................................................................ 32
Figure 12: FSK Receiver window ................................................................................................................ 33
Figure 13: FSK IRQ and Map window ........................................................................................................ 34
Figure 14: FSK Packet Handler window ..................................................................................................... 35
Figure 15: FSK Sequencer window ............................................................................................................ 36
Figure 16: FSK Temperature window ......................................................................................................... 37
Revision 1 – June 2013
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SX1272 Development Kit
USER GUIDE
WIRELESS & SENSING PRODUCTS
1 Preamble
This document describes how to use the SX1272 Evaluation kit. This document describes especially the
SX1272 Eiger platform and the SX1272 SKA User Interface. We strongly recommend for the user to read
thoroughly the datasheet of the SX1272 prior to start working on the device. Most of this document
assumes a general knowledge on the SX1272 and modern RF communications.
2 Introduction
The SX1272 is a single-chip integrated circuit ideally suited for today's high performance ISM band RF
applications. Added to the renowned, high-performance and low-cost, FSK / OOK RF transceiver modem,
the SX1272 is also equipped with the LoRa proprietary transceiver modem. This advanced feature set,
including a state of the art packet engine, greatly simplifies system design whilst the high level of
integration reduces the external BOM to a handful of passive decoupling and matching components. It is
intended for use as high-performance, long range, half-duplex bi-directional RF links, and where stable
and constant RF performances are required over the full operating range of the device down to 1.8V.
The SX1272 is intended for applications over a wide frequency range, including the 868 MHz European
and the 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.
The SX1272 Evaluation kit, based around the Eiger platform, allows the user to test every aspect of the
radio, both from the system and RF point of view.
On one hand, the Eiger platform is a touch screen portable device which has been design to enable quick
and easy testing of the PER performances of the SX1272. On the other hand, the SX1272SKA is a PC
based evaluation tool which allows in depth testing of the radio.
This document is therefore divided in two parts: the first part present the SX1272 Eiger module and how
to perform PER test in LoRa and FSK; the second part of this document present the SX1272 SKA and
how it can be used to test every single aspect of the radio.
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SX1272 Development Kit
USER GUIDE
WIRELESS & SENSING PRODUCTS
3 Getting Started
3.1 Evaluation Kit Contents
The SX1272SKA evaluation kit consists of:
2 x Eiger platforms
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)
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©2013 Semtech Corporation
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