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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Alarm service</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/3461/alarm-service</link><description>I need my device in some conditions to create an alarm which will be readable for any BLE device in range. Is it possible? What is the right way of doing so?
Thank you.</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Wed, 08 Oct 2014 02:45:37 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/3461/alarm-service" /><item><title>RE: Alarm service</title><link>https://devzone.nordicsemi.com/thread/12520?ContentTypeID=1</link><pubDate>Wed, 08 Oct 2014 02:45:37 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:47934e09-7bd4-47e5-8aa9-524407ee87a9</guid><dc:creator>barmaley</dc:creator><description>&lt;p&gt;Sorry for delay, still busy...&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Alarm service</title><link>https://devzone.nordicsemi.com/thread/12519?ContentTypeID=1</link><pubDate>Thu, 18 Sep 2014 11:59:14 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:4dfd316d-48b9-4e0b-8ffd-9d5a060eda76</guid><dc:creator>barmaley</dc:creator><description>&lt;p&gt;thank you. I need some time to work on it.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Alarm service</title><link>https://devzone.nordicsemi.com/thread/12518?ContentTypeID=1</link><pubDate>Sat, 13 Sep 2014 19:37:26 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:fdc930db-63f0-40c1-86c6-20fcfd16a6e2</guid><dc:creator>David Edwin</dc:creator><description>&lt;p&gt;The Alarm can be broadcast and the receivers can re-broadcast the alarm so that it can be propogated. The Alarm broadcast may require some authentication or signing of the packets so that only the right system can set off the alarm. The receivers that are re-broadcasting may restrict their period of re-broadcasting based on their power source.&lt;/p&gt;
&lt;p&gt;You can consider the trickle algorithm ( See &lt;a href="http://tools.ietf.org/html/rfc6206"&gt;tools.ietf.org/.../rfc6206&lt;/a&gt; ) for your broadcasting.
Hope this gets you started.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Alarm service</title><link>https://devzone.nordicsemi.com/thread/12517?ContentTypeID=1</link><pubDate>Sat, 13 Sep 2014 19:30:40 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:f9ca383d-19c4-4743-9eb6-da346d4168f8</guid><dc:creator>barmaley</dc:creator><description>&lt;p&gt;You are correct, in my mind, that it has to be broadcast. This broadcast will have limited (by size)alarm information. Otherwise, it will not capable to read it. I don&amp;#39;t know what else you want me to explain.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Alarm service</title><link>https://devzone.nordicsemi.com/thread/12516?ContentTypeID=1</link><pubDate>Sat, 13 Sep 2014 12:39:29 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:5c1292c6-571d-4d10-9128-e8cdc89b5b20</guid><dc:creator>David Edwin</dc:creator><description>&lt;p&gt;Can you explain a bit more on how your Alarm would work ? Would your device have the &amp;quot;Alarm&amp;quot; Service that other device will query or will your device just broadcast the &amp;quot;Alarm&amp;quot;, broadcasting may make more sense, but it would be good if you can explain you needs a bit more.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>