op25-dev January 2018

op25-dev@lists.osmocom.org

1 participants
3 discussions

Christmas Announcements 2017
by ikj1234i＠yahoo.com [op25-dev] 05 Apr '18

05 Apr '18

ANNOUNCEMENTS =============== 1) New Web site Our new web site is now on the air! I'd like to thank Matt Ames for his efforts and hard work in reworking content to fit the new format. I'd also like to take this opportunity to thank our hosts at Osmocom, Harald and Holger, for kindly offering this free resource and home for the project. web site: http://op25.osmocom.org/ git repo: https://git.osmocom.org/op25 2) Recent additions and updates Several updates have recently been pushed and are in the 'max' branch of the repo. In addition to bug fixes in both transmitter and receiver applications and libraries, there are a couple of new features: * remote terminal: the curses terminal may now run in a separate process or on a separate machine from rx.py, with connectivity via UDP. * dstar transmitter configuration: the dstar specific config options for repeater 1/2, mycall, and urcall are now supported. 3) CPU usage reduction effort Except for the actual speech decoding process which remains unchanged, the channel tuning and demodulation logic has undergone some streamlining. The result should be a significant reduction in CPU usage in rx.py, especially during idle periods. It's possible some of these optimizations may be slightly too radical; it would be good to receive feedback from all users, but especially from those with- * crowded bands with close channel spacing * p25 phase 2/tdma talkgroups * "center frequency" set to zero in the trunking tsv file 4) New multiple rx app Released today (Dec. 25, 2017) is a sneak preview of a new receiver app, multi_rx.py. It should be considered alpha test grade. The highlights: * receives DMR/YSF/P25(P1) (DSTAR almost finished) * an arbitrary number of concurrently active SDR devices * arbitrary numbers of channels/frequencies For more information see the README file in the apps/ directory of the repo. All of these additions have been pushed to the 'max' branch of the repo. If you have a previous installation of OP25 you should change to the 'build' directory of that installation and do sudo make uninstall prior to pulling and building the new version.

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OP25 RPi Image
by John Ackermann N8UR jra＠febo.com [op25-dev] 29 Jan '18

29 Jan '18

I finally had time to package up my OP25 system onto a ready-to-run image for an RPi3. This is based on the full Raspbian Stretch OS with GUI, so it's a 1.3 GB download. It's at http://febo.com/pages/os_images, along with a couple of other RPi images (one for an NTP time server, another that makes a bunch of RTL-SDR dongles look like a single Hermes HPSDR receiver). After downloading, unzip the file (it'll be a bit over 4GB) and write to an 8GB SD card. Stick the card in your Pi and wait for the desktop to appear. This system has Graham's (github.com/boatbod) latest code and if you happen to live in Montgomery County, Ohio, and have an HDMI monitor with speakers, you are all set to go. :-) Otherwise, you'll need to make appropriate edits to the config files and possibly change the sound settings. Enjoy! 73, John

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multi_rx
by gnorbury＠bondcar.com [op25-dev] 20 Jan '18

20 Jan '18

FWIW i endeavor to keep my fork up to date with the max branch so multi_rx should be available in both versions. I've not personally testing it though, so I cannot offer help or guidance on setup and usage. Graham

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op25-dev January 2018