<?xml version="1.0" encoding="UTF-8" ?>
<?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>RSSI Calculation</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/12288/rssi-calculation</link><description>Hi all, 
 I need to know the RSSI Value (distance) between my nRF 51 DK and my connected device (iOS Device). I made these code changes: 
 switch (p_ble_evt-&amp;gt;header.evt_id)
{
 case BLE_GAP_EVT_CONNECTED:
 err_code = bsp_indication_set(BSP_INDICATE_CONNECTED</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Wed, 02 Mar 2016 16:15:50 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/12288/rssi-calculation" /><item><title>RE: RSSI Calculation</title><link>https://devzone.nordicsemi.com/thread/46449?ContentTypeID=1</link><pubDate>Wed, 02 Mar 2016 16:15:50 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:e9f34525-0c7e-46f3-af98-e07db042353d</guid><dc:creator>Petter Myhre</dc:creator><description>&lt;p&gt;I&amp;#39;m not following. The RSSI is received signal strength indication. iOS is not sending an RSSI value, the nRF51 radio measures the strength of the received radio signal from the radio on the iOS device.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RSSI Calculation</title><link>https://devzone.nordicsemi.com/thread/46448?ContentTypeID=1</link><pubDate>Wed, 02 Mar 2016 15:44:36 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:17385bcb-72ff-4e86-a649-52bb1334749e</guid><dc:creator>awneil</dc:creator><description>&lt;p&gt;OK; when you said, &amp;quot;RSSI Value (distance)&amp;quot; that seemed to imply a simple, direct relation - it was not clear that you understood that RSSI can only give an &lt;strong&gt;&lt;em&gt;approximation&lt;/em&gt;&lt;/strong&gt;.&lt;/p&gt;
&lt;p&gt;Does the cited thread not answer your question about how RSSI is calculated?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RSSI Calculation</title><link>https://devzone.nordicsemi.com/thread/46447?ContentTypeID=1</link><pubDate>Wed, 02 Mar 2016 15:31:42 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:3f1fbf92-c05c-44e2-bb0c-3d7828e6092d</guid><dc:creator>SKo</dc:creator><description>&lt;p&gt;The RSSI value is needed for an approximation not for receiving an exact distance. Are you able to say something to my question?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RSSI Calculation</title><link>https://devzone.nordicsemi.com/thread/46446?ContentTypeID=1</link><pubDate>Wed, 02 Mar 2016 15:27:58 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:bedf7ba9-6def-42d3-8d79-997cfca19ddd</guid><dc:creator>awneil</dc:creator><description>&lt;blockquote&gt;
&lt;p&gt;&lt;em&gt;&amp;quot;RSSI Value (distance)&amp;quot;&lt;/em&gt;&lt;/p&gt;
&lt;/blockquote&gt;
&lt;p&gt;Note that RSSI Value is only loosely linked to distance - there is no direct relation.&lt;/p&gt;
&lt;p&gt;This thread explains the RSSI value: &lt;a href="https://devzone.nordicsemi.com/question/12107/nrf51822-why-i-read-2complemenr-rssi-value/"&gt;devzone.nordicsemi.com/.../&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>