Adeunis RF SIGFOX Si868-25mW User manual

SIGFOX
Si868-25mW RF Module
User guide version V1.3
Software version V1.3
ADEUNIS RF
283 rue Louis Néel - Parc Technologique Pré Roux
38920 CROLLES - France
Tel. : [phone] - Fax : [phone]
www.adeunis-rf.com [e-mail]
This datasheet has been downloaded fromhttp://www.digchip.com at this page

SIGFOX - Si868_25mW - User guide version V1.3 - Software version V1.3
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Information
Document information
Title Si868_25mW SIGFOX module User guide
Subtitle User guide version V1.2
Document type Hardware integration and software management manual
Document status Release for SIGFOX module software version V1.3
This document applies to the following products
Name Reference Firmware version
Si868-25mW-RTU ARF7764AA V1.3
Disclaimer
This document and the use of any information contained therein, is subject to the acceptance of the Adeunis RF terms and conditions.They can
be downloaded from www.adeunis-rf.com.
Adeunis RF makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make
changes to specifications and product descriptions at any time without notice.
Adeunis RF reserves all rights to this document and the information contained herein. Reproduction, use or disclosure to third parties without
express permission is strictly prohibited. Copyright © 2012, Adeunis RF.
Adeunis RF is a registered trademark in the EU and other countries.
Technical Support
Website
Our website contains many useful information : modules and stand alone products information, user guides, configuration software and techni-
cal documents which can be accessed 24 hours a day.
Email
If you have technical problems or cannot find the required information in the provided documents, contact our Technical Support by email. Use
our dedicated email address ([e-mail]) rather than any personal email address of our staff. This makes sure that your request is
processed as soon as possible.
Helpful Information when Contacting Technical Support
When contacting Technical Support please have the following information ready:
• Complete product type & reference (e.g. Si868-25mW - ARF7764AA),
• Firmware version (e.g.V1.3.0)
• Clear description of your question or the problem
• A short description of the application
• Your complete contact details

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Modules REGULATORY CONSIDERATIONS
DECLARATION OF CONFORMITY
•Si868-25mw MHz module
We ADEUNIS RF
283 rue LOUIS NEEL
38920 CROLLES FRANCE
declare under our own responsibility that the products
Name SIGFOX Si868-25mW
Reference ARF7764AA
to which this declaration refers conforms with the relevant standards or other standardising documents:
• EN 300 220-2 (V2.3.1) (2010-02)
• EN 60950-1 (2001) + A11 (2004)
• EN62311 (2008)
• EN301 489-1 (v1.8.1) (2008-04)
• EN 301 489-3 (v1.4.1) (2002-08)
According to the RTTE Directive 99/5/EC
Notes:
• According to the 1999/519/EC «RF signal» recommendations, a minimum distance of 10cm between the product and the body is required.
• Receiver class (if applicable): 2
• Usage restrictions : It is the user responsibility to be sure that the configuration and use of the NB868 module fulfill all the requirements
of Rec 70-03 (describing in annex 1, frequency bands, g, g1, g2, g3 or g4) . In certain cases, you may need to notify the final equipment to
European administrations.Adeunis RF can assist you on regulatory aspects
Crolles, January 6th, 2015 VINCENT Hervé - CEO

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SIGFOX - Si868_25mW - User guide version V1.3 - Software version V1.3
Table of contents
Information 2
Disclaimer 2
Technical Support 2
Modules REGULATORY CONSIDERATIONS 3
INTRODUCTION 5
EINLEITUNG 6
1. Modules overview 8
1.1. Adeunis RF concept 8
1.2. Module functionality 8
1.3. Technical specifications 8
2. Main characterictics 9
2.1. Form factor and footprint 9
2.2. Pins description 9
2.2.1 Pinout of the module 9
2.2.2 Pin configuration 10
2.3. Electrical & Radio characteristics 10
2.3.1 Absolute maximum specifications 10
2.3.2 Global Electrical Characteristics 11
2.3.3 IOs Electrical Characteristics 11
2.3.4 Radio limitations using SIGFOX protocol 11
3. Recommended Design 11
3.1. Power Supply 12
3.2. Antenna design and matching 12
3.3. PCB and Ground plane considerations 12
4. SIGFOX Cycle 13
5. Operating mode 14
5.1. UART settings 14
5.2. Sending a command 14
5.3. Available commands 14
5.3.1 Setup command 14
5.3.2 Description of registers 15
5.3.3 SIGFOX command 16
5.3.3.1 AT$SB command with uplink only 16
5.3.3.2 AT$SB command with uplink and downlink 16
5.3.3.3 AT$SF command with uplink only 17
5.3.3.4 AT$SF command with uplink and downlink 17
6. Evaluation Board Si868 SIGFOX 18
6.1. Evaluation Board kit content 18
6.2. Evaluation board overview 18
6.3. Power supply 18
6.4. Evaluation board connector 18
6.4.1 Connector Pin out 18
7. Process 19
7.1. Description of module 7764xxx 19
7.2. BOM analysis 19
7.3. Risk linked to number of reflows 19
7.4. Soldering curve 20
8. Version history 20

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INTRODUCTION
All rights to this manual are the exclusive property of ADEUNIS RF. All rights reserved. Copying this manual (without written permission from the
owner) via printing, copying, recording or by any other means, translating this manual (in full or partially) into any other language, including all
programming languages, using any electrical, mechanical, magnetic or optical devices, manually or any by other methods, is prohibited.
ADEUNIS RF reserves the right to change the technical specifications or functions of its products, or to cease manufacturing any of its products,
or to cease technical support for one of its products without notice in writing and urges its customers to make sure that the information they
have is valid.
ADEUNIS RF configuration software and programs are available free of charge in a non-modifiable version. ADEUNIS RF can make no gua-
rantees, including guarantees concerning suitability and applicability for a certain type of application. Under no circumstances can the manufac-
turer, or the distributor of an ADEUNIS RF program, be held liable for any damage caused by the use of the aforesaid program. Program names,
as well as all copyright relating to programs, are the exclusive property of ADEUNIS RF. Any transfer, granting of licences to a third party, leasing,
hire, transport, copying, editing, translation, modification into another programming language or reverse engineering are prohibited without
ADEUNIS RF’s prior written authorisation and consent.
ADEUNIS RF
283, rue Louis Néel
38920 Crolles
France
Telephone [phone]
Fax [phone]
Environmental recommendations
All superfluous packaging materials have been eliminated. We have done everything possible to make it easy to separate the packaging into
three types of materials: cardboard (box), expanded polystyrene (filler material) and polyethylene (packets, foam protective sheets). Your device
is composed of materials that can be recycled and reused if it is dismantled by a specialist company. Please observe local regulations concerning
the manner in which waste packaging material, used batteries and your obsolete equipment are disposed of.
Warnings
Valid for SIGFOX modules with the following references: ARF7764AA
Read the instructions in the manual.
The safety of this product is only guaranteed when it is used in accordance with its purpose.
Maintenance should only be carried out by qualified persons.
Please note, do not install the equipment close to a heat source or in damp conditions.
Please note: for your own safety, you must ensure that the equipment is switched off before carrying out any work on it.
Please note: For your safety, the power supply circuit must be SELV (Safety Extra Low Voltage) and must be a limited power
sources.
Recommendations regarding use
• Before using the system, check that the power supply voltage shown in the user manual corresponds to your supply. If it
doesn’t, please consult your supplier.
• Place the device against a flat, firm and stable surface.
• The device must be installed in a location that is sufficiently ventilated so that there is no risk of internal heating and it must
not be covered with objects such as newspapers, cloths, curtains, etc.
• The device’s aerial must be free and at least 10 cm away from any conducting material.

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• The device must never be exposed to heat sources such as heating equipment.
• Do not place the device close to objects with naked flames such as lit candles, blowtorches, etc.
• The device must not be exposed to aggressive chemical agents or solvents likely to damage the plastic or corrode the metal parts.
• Install your device close to its DC power supply.
Disposal of waste by users in private households within the European Union
This symbol on the product or on its packaging indicates that this product must not be disposed off with
your other household waste. Instead, it is your responsibility to dispose of your waste by taking it to
a collection point designated for the recycling of electrical and electronic appliances. Separate collection and recycling of your waste
at the time of disposal will contribute to conserving natural resources and guarantee recycling that respects the environment and human health.
For further information concerning your nearest recycling centre, please contact your nearest local authority/town hall offices, your household
waste collection company or the shop where you bought the product.
EINLEITUNG
Alle Rechte an diesem Handbuch sind das alleinige Eigentum der ADEUNIS RF. Alle Rechte sind vorbehalten. Jede (ohne die schriftliche Geneh-
migung des Eigentümers erfolgende) Wiedergabe dieses Handbuches durch Druck, Kopie, Aufzeichnung oder jedwedes andere Mittel sowie die
(vollständige oder teilweise) Übersetzung in jede andere Sprache einschließlich aller Programmiersprachen durch Verwendung welcher elektris-
cher, mechanischer, magnetischer, optischer, manueller Vorrichtungen oder anderen Methoden auch immer, sind verboten.
Die ADEUNIS RF behält sich das Recht vor, ohne irgendeine schriftliche Mitteilung die technischen Spezifikationen oder die Funktionen ihrer Pro-
dukte zu verändern, bzw. die Herstellung eines ihrer Produkte einzustellen oder den technischen Support für eines ihrer Produkte auszusetzen
und bittet ihre Kunden inständig sich zu vergewissern, dass die ihnen zur Verfügung stehenden Informationen zutreffend sind.
Die Konfigurations- und Programmsoftware der ADEUNIS RF steht kostenlos in einer Version zur Verfügung, die nicht verändert werden kann.
Die ADEUNIS RF kann keinerlei Garantie und auch keine Garantie zur Eignung und Anwendbarkeit für eine Applikation bestimmten Typs gewäh-
ren. Der Hersteller oder der Verkäufer eines Programms der ADEUNIS RF kann in keinem Fall für irgendwelche Schäden haftbar gemacht werden,
die durch die Anwendung des besagten Programms gegebenenfalls verursacht werden könnten. Die Bezeichnungen der Programme sowie alle
Urheberrechte zu den Programmen sind das alleinige Eigentum der ADEUNIS RF. Jede Übertragung, Gewährung von Lizenzen an einen Dritten,
Leasingvergabe, Vermietung, Übereignung, Kopie, Übersetzung, Modifizierung in eine andere Programmiersprache oder durch ein Reverse Engi-
neering ist ohne die schriftliche Genehmigung und ohne das Einverständnis der ADEUNIS RF verboten.
ADEUNIS RF
283, rue Louis Néel
38920 Crolles
France
Tel [phone]
Fax [phone]
Hinweise zum Umweltschutz
Alle überflüssigen Verpackungsmaterialien wurden vermieden.Wir haben auch alles getan, was uns möglich ist, damit die Verpackung ohne
Weiteres in drei Typen von Werkstoffen getrennt werden kann : Karton (die Schachtel), geschäumtes Polystyrol (Dämmmaterial) und Polyä-
thylen (Beutel, Schaumfolie zum Schutz). Ihr Gerät besteht aus Werkstoffen, die recycelt und weiterverwendet werden können, wenn es von
einem darauf spezialisierten Unternehmen demontiert wird. Beachten Sie bitte die jeweils geltenden örtlichen Vorschriften zur Entsorgung der
Verpackungsmaterialien, der verbrauchten Batterien und Ihres ausgemusterten Gerätes.

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Warnhinweise
Gültig für die Relaisempfänger mit den Artikelnummern : ARF7764AA
Lesen Sie die Anleitungen dieses Handbuches.
Die durch dieses Produkt gewährte Sicherheit kann nur bei einer Anwendung entsprechend dem vorgesehenen Einsatzzweck gewährleistet
werden.
Achtung ! Zu Ihrer eigenen Sicherheit ist es unerlässlich, das Gerät vor jedem technischen Eingriff spannungsfrei zu schalten.
Achtung ! Zu Ihrer eigenen Sicherheit die Stromversorgung Schaltung muss SELV (Safety Extra Low Voltage) sein und muss der begrenzten
Stromquellen sein.
Empfehlungen für den Einsatz
• Vor dem Einsatz des Systems müssen Sie überprüfen, dass die in der Bedienungsanleitung angegebene Anschlussspannung den Werten
Ihrer Stromversorgung entspricht. Anderenfalls wenden Sie sich bitte an Ihren Lieferanten.
• Stellen Sie das Gerät auf einer ebenen, festen und stabilen Fläche auf.
• Um jede Gefahr einer inneren Erwärmung des Gerätes zu vermeiden, ist dieses an einem gut belüfteten Ort aufzustellen und darauf zu
achten, dass keine Gegenstände wie Zeitschriften, Matten, Vorhänge u. a. darauf abgelegt werden.
• Die Antenne des Gerätes muss frei liegen und von jeglichen leitenden Werkstoffen mindestens 10 cm entfernt sein.
• Das Gerät darf niemals der Einwirkung von Wärmequellen oder Heizgeräten ausgesetzt sein.
• Das Gerät darf sich niemals in der Nähe von Gegenständen mit offener Flamme befinden, wie brennenden Kerzen, Schweißbrennern usw.
• Das Gerät darf niemals der Einwirkung von aggressiven Chemikalien oder Lösemittel ausgesetzt werden, die geeignet sein könnten, den
Kunststoff zu beschädigen oder die Metallteile zu korrodieren.
• Stellen Sie Ihr Gerät in der Nähe der Quelle seiner Spannungsversorgung DC auf.
Entsorgung der Abfälle von Betreibern in Privathaushalten innerhalb der Europäischen Union
Dieses Symbol auf dem Produkt oder auf seiner Verpackung weist darauf hin, dass dieses Produkt nicht gemeinsam mit Ihrem anderen
Haushaltsmüll entsorgt werden darf. Stattdessen haben Sie dafür Sorge zu tragen, Ihre Abfälle bei einer Erfassungsstelle zu entsorgen, die auf
das Recycling elektrischer und elektronischer Geräte spezialisiert ist. Die gesonderte Erfassung und das Recycling ihrer Abfälle bei der Ent-
sorgung tragen dazu bei, die natürlichen Ressourcen zu bewahren und ein Recycling zu gewährleisten, das dem Schutz der Umwelt und der
menschlichen Gesundheit dient. Für weitere Informationen zu der Ihrer Wohnung am nächsten gelegene Recyclingstelle wenden Sie sich bitte an
die örtliche Gemeindeverwaltung, an die zuständige Dienststelle für die Müllabfuhr oder an das Geschäft, in dem sie das Gerät gekauft haben

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1. Modules overview
1.1. Adeunis RF concept
The idea is to provide the user with a module which is ready for operating in a SIGFOX network environment thus enabling the user to focus on
the development of its application. The aim is to relieve the user of having to deal with the complex radio management.
1.2. Module functionality
“Ready To Use” versions are intended for user willing to embed a SIGFOX radio functionality onto their already existing electronic design.
In the “Ready To Use” versions the modules operates in a standalone way. The user has to interface the module with a host processor where the
application code will be running.
The diagram above represents the way Adeunis SIGFOX module works :
«Ready to use» offers the following functionalities:
• The module is pre-configuration with SIGFOX Device ID and AES keys to be ready to use in a SIGFOX network
• The module can transmit and optionally receive data messages among the SIGFOX network
The module is low power to deal with battery powered devices environment and long life duration.
1.3. Technical specifications
Technical specifications
Communication SIGFOX protocol and modulation
Module configuration Through AT commands
Radio data rate Uplink : 100bps Sigfox specific
Downlink : 600bps GFSK
UART data rate 115.2 kbauds
UART TTL ports TXD - RXD
Center Frequency Uplink : 868.130MHz
Downlink : 869.525MHz
RF output power 14 dBm
Sensitivity down to -125 dBm @ FER10-2
Operating range (open space) External antenna: up to 15000 m
Operating voltage 2.4v to 3,6v (3,3v nominal)
Tx (@14Bm)/ Rx / Standby Typical 65mA / max 40mA / < 5µA
Operating temperature -40°C / +85°C
Dimensions 32 x 16 x 2.8 mm
Certification SIGFOX certification Class 0U ID: P_001F_337F_01
Standard compliance EN 300-220, EN 301-489, EN 60950,

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2. Main characterictics
2.1. Form factor and footprint
Footprint of the module
Note : dxf and gerber files are available on request
2.2. Pins description
2.2.1 Pinout of the module
Reserved
Reserved
Reserved
Reserved
GND
Reserved
RSSI
Reserved
Reserved
Reserved
Reserved
Reserved
V measure
Reserved
Reserved
Reserved
Reserved

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2.2.2 Pin configuration
Pin module Pin name I/O (1) Description
1 GND Ground (2)
2 GND Ground (2)
3 ANTENNA RF output
Must be adapted with 50 ohms matching
4 VCC Supply voltage (2)
5 GND Ground (2)
6 Reserved (3)
7 RESET I Reset
Should be connected to the host controller, may be left unconnected if reset not used
8 Reserved (3)
9BOOT_
MODE I
Boot loader activation (note : this pin must not be left unconnected
Must be set to GND for normal operation (pull-down 47k Ohms advised)
Must be set to VCC for firmware upgrade
10 UART_TX O Data output
Must be connected to the host controller
11 Reserved (3)
12 UART_RX I
Internal pull-up
Data input
Must be connected to the host controller, must be left unconnected if not used
13 Reserved (3)
14 Reserved (3)
15 Reserved (3)
16 Reserved (3)
17 Reserved (3)
18 GND Ground (2)
19 GND Ground (2)
20 VCC Supply voltage (2)
21 Reserved (3)
22 V measure I
Analog input
Input voltage measure
This pin is intended for power supply measurement.
23 Reserved (3)
24 Reserved (3)
25 Reserved (3)
26 Reserved (3)
27 Reserved (3)
28 GND Ground (2)
29 Reserved (3)
8 pins on both little side of the
module GND Ground (4)
(1) Described from the module point of vue (I : Is an input of the module, O is an output of the module) - The internal pull-up/pull-down is
between 30KΩ and 60KΩ, typical 45KΩ.
(2) All GND and VCC pins must be connected
(3) Must be left unconnected or connect to an input of the host controller
(4) Should be connect to GND to get best RF sensitivity
2.3. Electrical & Radio characteristics
2.3.1 Absolute maximum specifications
Parameter Min Typ Max Unit
Voltage on any GPIOs Pin -0.3 3.9 V
Vcc -0.3 3.6 V
RF input Power 10 dBm
Storage Temperature Range -55 +125 °C

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2.3.2 Global Electrical Characteristics
Parameter Conditions Min Typ Max Units
Vcc 2.4V 3.3 3.6 V
Specified Operating Tem-
perature Range
-30 70 °C
2.3.3 IOs Electrical Characteristics
Parameter Conditions Min Typ Max Units
Input High Voltage VCC= 2.4 to 3.6 V 2 V
Input Low Voltage VCC = 2.4 to 3.6 V 0.8 V
Output High Voltage IOH = -8 mA Vcc – 0.4 V
Output Low Voltage IOL = 8 mA 0.4 V
2.3.4 Radio limitations using SIGFOX protocol
The Si868 module transmits on a 48 kHz band centered around 868.2MHz at 100bps. Therefore limitations as per Annex 1 band g1.1 apply. In
order to fulfill the specification requirement regarding duty cycle on ISM band and to be aligned with SIGFOX network, it is allowed to send up
to 72 Bytes per hour (e.g., 6 messages of 12 payload bytes each, e.g 1 message every 10mn).
3. Recommended Design

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3.1. Power Supply
The module is powered through VCC (pins 4 and 20) and GND and the power supply voltage must be between 2.4V and 3.6 V, 3.3 V typical.
As described in Figure 2, we suggest adding a filter cell on the module voltage power supply pin (VCC). Each «GND» pin must be connected
by vias to the ground plane of the motherboard (with the shortest distance). Place as many vias as possible to reduce parasitic inductance to
ground plane. The unnumbered «GND» located on both little sides of the module are not required but are strongly recommended for maximum
RF performance.
• If used, the 100nH inductor L3 must have a resonant frequency> 1GHz in order to be effective at 869MHz, working frequency band of the
SI868 module. An appropriate ferrite could also be used instead of an inductor.
• Capacitors C4 and C3 must be “RF-Grade” capacitors, i.e. with a resonant frequency >1GHz.
• The design of the power supply filter must be able to provide a current up to 300mA.
3.2. Antenna design and matching
The network formed by L1, L2, C1 and C2 constitutes the matching network to the antenna. The values of these components have to be re-defi-
ned for each different project as they will depend on the characteristics of the antenna, the working RF frequency and the PCB layout. Therefore,
no typical values are given in this recommended design.
• If no matching network is required, L1 and L2 can be left NC (not connected) and C1 and C2 can be replaced by 0Ω resistors.
• If L1 and L2 are used, proper grounding is critical. Multiple vias to ground should be used for each inductor separately (see Figure 3).
• The PCB trace going from the ANT port of the module to the antenna (Red trace on Figure 2) should be a 50Ω microstrip line.
As antenna problematics are not trivial, ADEUNIS RF will gladly assist you in your choice or design of antennas so as to optimize the perfor-
mance of your products. Feel free to contact us for more information.
Below an example of proper grounding
3.3. PCB and Ground plane considerations
If possible, the top-side and bottom-side layers of the customer’s PCB should be GND planes. Usually components are placed on the top-side.
The bottom-side GND plane should be kept clean and uninterrupted, and signals should be routed on the top-side and the internal layers.
Disturbing signals such as clocks should be routed on the internal layers.

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• MultipleviasshouldconnectbothGNDplanestogether.
• Itisbestifthebottom-sideGNDplaneiskeptcleananduninterruptedformaximumRFperformance
• ItisbestifthePCBhasoneofitsdimensions(widthorlength)equaltoλ/4,i.e.8.6cmat868MHzformaximumRFperformance
4. SIGFOX Cycle
A SIGFOX cycle always start with an uplink transmission i.e. sending data from end device – our ARF module – to the SIGFOX Network. This
message is always transmitted three time. It may be optionally followed by the reception of a downlink message sent by the network. I
In a SIGFOX network, “end device” always initiate transmissions. The only way to transmit data for the Network server is to wait for an end
device uplink message which has required downlink data !
A typical SIGFOX cycle without downlink communication required from the end device is shown in the following figure:
A typical SIGFOX cycle with downlink communication required from the end device is shown in the following figure:
The maximum payload size of uplink messages is 12 data bytes. For downlink message, the size is 8 bytes.

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5. Operating mode
5.1. UART settings
The UART port of the module is the main interface for the host controller.
The communication requires 10 bits for each byte to transmit, including one start bit followed by 8 data bits and then one stop bit. The Start bit
value is the logical “0” while the stop is the logical “1” value. There is no parity bit in the transmission. The module is working at 115.2kbps
with 8 data bits and no parity.
Please note that this UART port does not support electrical RS232 characteristics.An external RS232 driver has to be used if RS232 interface is
required
5.2. Sending a command
By default, the module is running into sleep mode, allowing the lowest possible power consumption. To initiate a SIGFOX cycle or to configure
the module, the host controller will send a command on the module UART interface.
Each command must be proceeding by 5 0xFF chars to wake up the module. The module will stay running during the execution of the command
and then automatically return back to its sleep mode.
Chars must be transmitted in a flow without char spacing (less than 1 ms is required) to ensure the module will not return into sleep mode
before a complete command has been received.
5.3. Available commands
The embedded set of command is based on AT format.AT commands are either used to read and write some registers used for the module
configuration or directly to execute operation such as SIGFOX transmission cyle.
AT command matches the following format:
• Five 0xFF chars to wake up the module
• Two ASCII characters “AT”,
• One or more characters and data (see C below for the syntax of AT commands available on the module).
• Each command should end with a “CR” or “CR” “LF”, the two possibilities are accepted. (CR signifies: Carriage Return, LF signifies: Line
Feed)
On receipt of a command the module returns:
• “the data”<cr><lf>, for a reading command, type ATS<n> ? , AT/S or AT/V.
• “O” <cr><lf>, for all other setup commands if it is accepted, “OK” for SIGFOX command.
• “E” <cr><lf>, if it refuses the command because of a syntax error, unknown command, unknown register, invalid parameter, etc.
• “KO” for SIGFOX command ending with an error
5.3.1 Setup command
Setup command allow modem configuration:
Table of AT commands:
Command Description Reply
ATS<n>? Returns the contents of register n Sn=y where
Y represents the contents of register n
ATS<n>=<m> Transfer the value m to register n «O»<cr> if operation OK
«E»<cr> if error
AT/S Display as a list, the content of each User register Sxxx=y<cr><lf> for each register
AT/V Display the complete firmware version SFX-RTU-EU_v1.3
AT/R Restore the content of registers with default values «O»<cr> if operation OK
«E»<cr> if error
ATR Restore the content of registers with default
values
«O»<cr> if operation OK
«E»<cr> if error

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Command Description Reply
AT&W Save the register configuration in E2PROM. «O»<cr> if operation OK
«E»<cr> if error
AT&RST Restart the module «O»<cr> if operation OK
«E»<cr> if error
ATO Exit command mode «O»<cr> if operation OK
«E»<cr> if error
Example of a series of commands and corresponding replies as one could see them on a terminal:
Syntax of the Command Description Syntax of the response
\FF\FF\FF\FF\FFATS230=24\0D Set the contents of register 230 to 24 O
\FF\FF\FF\FF\FFATS230?\0D Request the register 230 value S230=24
\FF\FF\FF\FF\FFAT&W\0D Save the register configuration in E2PROM. O
5.3.2 Description of registers
When switching on, the SIGFOX module operates according to the last configuration saved (factory configuration if its the first switching on, or
if this configuration has not been changed).
Modification commands, type ATS<n>=<m> or ATR allow the content of registers to be modified. The product is usable with each new configu-
ration as long as it is not disconnected. On the other hand the modified values will be applied next time the module is switched on only if they
have been saved by AT&W command
List of the registers accessible on the SIGFOX module :
Syntax of the Command Description Default value Comments
S200 Central frequency for uplink transmission (in Hz) 868130000
S201 Central frequency for downlink transmission (in
Hz) 869525000
S202 Number of SIGFOX frame repeat per cycle 2
This value cannot be modified
The message is sent 3 times for
each SIGFOX cycle
S210 UART baudrate 7This value cannot be modified
Baudrate = 115.2kbps
S211 UART number of data bit 1This value cannot be modified
Number of data bit = 8 bits
S212 UART parity 0This value cannot be modified
Parity = none
S281 SIGFOX device Identifier Initialized at factory
process
This value cannot be modified This
value is unique for each device
and must be used to identify it on
the network

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5.3.3 SIGFOX command
SIGFOX commands are used to transmit and receive data from the network.
Command Description Reply
AT$SB=<Bit value>,<Bidir/Monodir> Send a bit value i.e. a simple binary 0 or 1
value over the SIGFOX network.
<Bit value>=0 or 1
<Bidir/Monodir> = 0 for monodir,
1 for bidir mode
AT$SF=<Message>,<Bidir/Monodir> Send a message over the SIGFOX network. <Message>=up to 24 ascii byte coding an
hexadecimal value.
<Bidir/Monodir> = 0 for monodir, 1 for bidir
mode
5.3.3.1 AT$SB command with uplink only
This implements a communication with only uplink data (from end device to network server). The frame is transmitted according the S202 regis-
ter value + 1. Each transmission is followed by a one second interval.
\FF\FF\FF\FF\FFAT$SB=1,0<CR> Send an bit value of 1 without requesting any data from the network server
OK<CR><LF> The module immediately send an OK to acknowledge the command. The SIGFOX cycle starts. Due to low
data rate used and the 1 second interval between repetitions, it will takes several seconds before ending.
TX END<CR><LF> The whole SIGFOX cycle has now completed. The module is back to sleep mode.
5.3.3.2 AT$SB command with uplink and downlink
This implements a bidirectional communication with uplink and downlink data. The frame is transmitted according the S202 register value +
1. Each transmission is followed by a one second interval. After a 20 seconds delay starting from the end of the first transmission, the module
opens a reception window allowing the server to send respond. If a respond is received, it is forwarded on the UART of the module in row data
mode. A maximum of 8 bytes may be received from the server.
Here is an example of bidirectional transaction successfully ended with the following SIGFOX reply: \53\59\47\46\4F\58\21\0D (note that these
hex values corresponds to the ascii char codes “SIGFOX!<CR>”
\FF\FF \FF \FF\FFAT$SB=0,1<CR> Send an bit value of 0 and request data from the network server
OK<CR><LF>
The module immediately send an OK to acknowledge the command. The SIGFOX cycle starts. Due to low
data rate used, the 1 second interval between repetitions and the 20 seconds before starting reception,
it will takes several seconds before ending.
RX=SIGFOX!<CR> The 8 bytes returned from the server preceding by “RX=” Ascii chars.
RX END<CR><LF> The whole SIGFOX cycle has now completed. The module is back to sleep mode.
The same example will terminate as describe bellow if the downlink frame is not received from the server:
\FF\FF\FF\FF\FFAT$SB=0,1<CR> Send an bit value of 0 and request data from the network server
OK<CR><LF>
The module immediately send an OK to acknowledge the command. The SIGFOX cycle starts. Due to low
data rate used, the 1 second interval between repetitions and the 20 seconds before starting reception,it
will takes several seconds before ending.
KO<CR><LF> The SIGFOX cycle has now completed without reception of downlink message. The module is back to
sleep mode.

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5.3.3.3 AT$SF command with uplink only
This implements a communication with only uplink data (from end device to network server). The frame is transmitted according the S202
register value + 1. Each transmission is followed by a one second interval.The frame to be sent is coded in ASCII bytes in hexadecimal format.
Two ASCII bytes are required to encode one hexadecimal value. Because maximum SIGFOX payload is 12 bytes, the frame must be limited to 24
ASCII bytes. The frame must be encoded with a paired number of ASCII bytes.
Here is an example of transaction with the following payload: \00\01\02\03\04\05\06\07\08\09\0A\0B
\FF\FF\FF\FF\FFAT$SF=000102030405060708090A0B,0<CR>
Send the frame without requesting any data from the network server
TX END<CR><LF>
The module immediately send an OK to acknowledge the command. The SIGFOX cycle starts. Due to low
data rate used, the 1 second interval between repetitionsand the 20 seconds before starting reception,
it will takes several seconds before ending.
OK<CR><LF> The whole SIGFOX cycle has now completed.The module is back to sleep mode
5.3.3.4 AT$SF command with uplink and downlink
This implements a bidirectional communication with uplink and downlink data. The frame is transmitted according the S202 register value +
1. Each transmission is followed by a one second interval. After a 20 seconds delay starting from the end of the first transmission, the module
opens a reception window allowing the server to send respond. If a respond is received, it is forwarded on the UART of the module in row data
mode. A maximum of 8 bytes may be received from the server. After the whole sequence has complete, the module comes back to sleep mode.
For data encoding of uplink message, refer to section 5.3.3.3.
Here is an example of bidirectional transaction successfully ended with the following SIGFOX reply: \53\59\47\46\4F\58\21\0D (note that these
hex values corresponds to the ascii char codes “SIGFOX!<CR>”
\FF\FF\FF\FF\FFAT$SF=000102030405060708090A0B,1<CR>
Send the frame and request data from the network server
OK<CR><LF>
The module immediately send an OK to acknowledge the command. The SIGFOX cycle starts. Due to low
data rate used, the 1 second interval between repetitionsand the 20 seconds before starting reception,
it will takes several seconds before ending.
RX=SIGFOX!<CR> The 8 bytes returned from the server preceding by “RX=” Ascii chars
RX END<CR><LF> The whole SIGFOX cycle has now completed.The module is back to sleep mode
The same example will terminate as described below if the downlink frame is not received from the server:
\FF\FF\FF\FF\FFAT$SB=0,1<CR> Send an bit value of 0 and request data from the network server
OK<CR><LF>
The module immediately send an OK to acknowledge the command. The SIGFOX cycle starts. Due to low
data rate used, the 1 second interval between repetitions and the 20 seconds before starting reception,it
will takes several seconds before ending.
KO<CR><LF> The SIGFOX cycle has now completed without reception of downlink message. The module is back to
sleep mode.

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6. Evaluation Board Si868 SIGFOX
The Adeunis RF Evaluation Board Si868 SIGFOX (P/N : ARF8082AA)is designed to help the user to achieve his objectives as quickly as
possible. It’s a powerful, compact and nomadic tool which meets three objectives :
• Evaluate the Adeunis-RF Si868 module
• Connect to SIGFOX network (user must take out a subscription with SIGFOX)
• Follow the user, from the development phases to the optimization of the on-site implementation of the finished product.
In addition, the Evaluation board provides an RF output designs to get the best Si868 module performances.
6.1. Evaluation Board kit content
The evaluation Board Si868 includes
1 x soldered Si868 module (ARF7764AA)
1 x 868MHz antenna
6.2. Evaluation board overview
Antenna socket
Si868 module
External power supply
Evaluation board connector
6.3. Power supply
The Evaluation Board Si868 must be power supplied through an external source. The connector is a Jack 3.5.
Operating voltage is 5V-500mA.An external power block is available through Adeunis RF (part number ACC1300BE).
6.4. Evaluation board connector
The connector allows to access the module UART. The connector is a HE13 (20pins).
Main manufacturer is 3M (P/N 8520-4500PL).
6.4.1 Connector Pin out
In order to access to the module, use pins 16, 18 and 20
1 to 15 16 17 18 19 20
unused UART TX unused UART RX unused GND
module side
1 3 .....
2 ........ 16 18 20

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7. Process
7.1. Description of module 7764xxx
7764xx module is fully SMT, single side. Assembly process is based on leadfree alloy, no clean flux residues
PCB material is FR4 material, 6 layers, class 6 , nickel-gold finish (ENIG).
7.2. BOM analysis
BOM was analyzed after loading and comparison with SERMA databases; from this job, we get the following data:
- Rohs status
- Obsolescence
- MSL level
- Max peak temp during reflow
- Time max at peak temp
- Number of reflow
- Lead finish of the package
- Termination description for resistor and capacitor chips; presence of nickel barrier or not
The worst case MSL level is 3. Other parts are level 1 classified.
Most parts are compliant with max peak temperature of 260°C during 10 seconds.
Most parts are compatible with 2 reflows.
All resistors and capacitors have nickel barriers in their terminations, which is necessary to
avoid leaching effect.
7.3. Risk linked to number of reflows
There is no high risk regarding the assembly of the module on mother board, since the land pattern is
larger than the “leads” (maybe the land pattern may be little bit large compared to the “leads” and then
there is risk of module slip during reflow soldering)
The stencil foil thickness should be 150 to 170 microns to ensure enough solder fillet; the stencil
aperture should be reduced in length and width by 150 microns roughly to avoid solder balling in case
misalignment occurs.
Check of maximum temperature (during reflow) on sensitive component body has to be done.
The trickiest point is regarding the moisture sensitivity and the way to consider the module for the
assembly on mother board.
Considering the components on the module, we can define the module as a level 3 component, whose
floor life under 60% max RH is 168 hours.
Having in mind that module to mother board assembly delay is not under control, same for temporary
storage atmosphere, the best solution is to dry the module after test and put it in reels and then pack
them in MBB bags.
Jedec JSTD 033 standard is helping us to define the conditions of drying
If drying occurs less than 10 days after first reflow,
24 hours 90°C seems a good compromise between time and temperature;
If drying occurs more than 10 days after first reflow,
The drying condition becomes 36 hours 90°C ;
Notes:
1) at end of drying , let the parts come back to room temperature slowly to avoid condensation.

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2) take care that reel material cannot withstand 90°C .Then it is needed to dry prior reeling.
Reeling should occur within a few hours after drying.
7.4. Soldering curve
8. Version history
User guide version Contents
V1.3 Consumption values updated
V1.2 Corrections on commande syntax (p.15)
V1.1 Correction son frame description and grounding
V1.0 UG released
Sonde TC1
sur C26 Sonde TC2
Sur U4