Since I posted my original articles on configuring the Gnuradio-based op25 P25 trunking scanner, there’s been a lot of progress in the code. In particular, there is a new fork that changes the program to a command-line version, which saves a lot of CPU resources and also offers added features. The new version will run nicely on a Raspberry Pi 3, and probably on an RPi 2 as well. Following are instructions to install it from scratch on the PI.<\/p>\n
Download the “raspian-stretch” image from raspberrypi.org<\/A> and copy the image to an 8GB SD card. There’s a very nice free tool to do that called Etcher<\/A>. Install the card in your Raspberry Pi, and connect the Pi to the internet.<\/p>\n Open a terminal window to run all the following steps.<\/p>\n First, update the system and add the “sources” repository: Now, download and build the op25 code: It will take a while to download and install all the packages, and then compile the op25 code. But when the installation finishes, you should be all set to go. But there are a couple of additional things that I do on my system to make life a little easier: Since I posted my original articles on configuring the Gnuradio-based op25 P25 trunking scanner, there’s been a lot of progress in the code. In particular, there is a new fork…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[9],"tags":[15,29,12,30],"class_list":["post-252","post","type-post","status-publish","format-standard","hentry","category-sdr","tag-p25","tag-scanner","tag-sdr","tag-trunking"],"_links":{"self":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=252"}],"version-history":[{"count":9,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions"}],"predecessor-version":[{"id":262,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions\/262"}],"wp:attachment":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n
\nsudo nano \/etc\/apt\/sources.list<\/code> and remove the “#” from the beginning of the line that includes “deb-src”.<\/LI>
\nsudo apt-get update<\/code><\/LI>
\nsudo apt-get dist-upgrade<\/code><\/LI>
\n
\nReboot the system before the next step.<\/p>\n
\n
\ncd \/home\/pi<\/code><\/LI>
\ngit clone https:\/\/github.com\/boatbod\/op25.git<\/code><\/LI>
\ncd op25<\/code><\/LI>
\n.\/install.sh<\/code><\/LI>
\n<\/UL><\/p>\n
\n
\n
\n
\nln -s \/home\/pi\/op25\/op25\/gr-op25_repeater\/apps \/home\/pi\/scanner
\n<\/code>
\n<\/LI><\/p>\n
\n
\n#!\/bin\/bash
\n\/home\/pi\/scanner\/rx.py --args 'rtl' --gains 'lna:35' -S 250000 -f 853.6e6 \\
\n-g 100 -q -1 -o 50000 -T \/home\/pi\/scanner\/trunk.tsv --udp-player -v 5 2>stderr.2
\n<\/code>
\n<\/LI>
\n<\/UL><\/p>\n","protected":false},"excerpt":{"rendered":"