{"id":83,"date":"2010-04-09T11:25:24","date_gmt":"2010-04-09T11:25:24","guid":{"rendered":"http:\/\/blog.designed79.co.uk\/?p=83"},"modified":"2010-04-09T11:26:01","modified_gmt":"2010-04-09T11:26:01","slug":"wifi-strength-from-command-line","status":"publish","type":"post","link":"https:\/\/blog.designed79.co.uk\/?p=83","title":{"rendered":"Wifi Strength from command line"},"content":{"rendered":"<p style=\"text-align: left;\">This hint basically does the same job as AP Grapher, but can be run from the command line or over SSH &#8212; so I was able to have someone else carry my MacBook Pro around the shed while I stayed near the wireless router and fiddled with its antennas.   I ssh&#8217;d into my MacBook Pro from a computer at the router, and ran the following command in Terminal:<\/p>\n<p style=\"text-align: left;\">while x=1; do \/System\/Library\/PrivateFrameworks\/Apple80211.framework\/Versions\/Current\/Resources\/airport -I | grep CtlRSSI; sleep 0.5; done<\/p>\n<p style=\"text-align: left;\">This periodically displays the received signal strength indicator (RSSI), basically the power of the microwave radio signal from your router.<\/p>\n<p style=\"text-align: left;\">The value is in dBm, which is a logarithmic scale so that an increase of 10 units means a factor of 10 increase in power; an increase of 20 means a factor of 100 increase in power; etc. Watching this reading, I was able to position the router and antenna for maximum signal strength at various places in the shed.<\/p>\n<p style=\"text-align: left;\">The airport -I command alone displays other useful information about your airport connection, like the network name, channel, authorization mode, and the noise on the microwave signal.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This hint basically does the same job as AP Grapher, but can be run from the command line or over SSH &#8212; [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-83","post","type-post","status-publish","format-standard","hentry","category-info-on-tech"],"_links":{"self":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/83","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=83"}],"version-history":[{"count":0,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/83\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=83"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=83"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=83"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}