Re: ZeroMQ Linger option

Ah, thanks for clearing that up. And it looks like there's no way to manually close/reopen the socket that gets created by the flowgraph correct? Cameron On Mon, Aug 10, 2020 at 6:15 PM Jeff Long wrote: > Also, time is always set to 0 for the setsockopt ZMQ_LINGER call, which > would cause i

Re: ZeroMQ Linger option

Also, time is always set to 0 for the setsockopt ZMQ_LINGER call, which would cause immediate shutdown of the socket. This is not related to timeout, which is used as the polling timeout. On Mon, Aug 10, 2020 at 7:06 PM Jeff Long wrote: > At socket shutdown, LINGER determines how long close(2) o

Re: ZeroMQ Linger option

At socket shutdown, LINGER determines how long close(2) or shutdown(2) will block waiting for queue messages to be sent. See man socket(7). On Mon, Aug 10, 2020 at 7:00 PM Cameron Matson wrote: > Hi all, > > Can someone help me understand what's going on with any of the ZMQ Message > Sink blocks

ZeroMQ Linger option

Hi all, Can someone help me understand what's going on with any of the ZMQ Message Sink blocks? The block takes a timeout parameter which is assigned to d_timeout, but ultimately it looks like the zmq.LINGER option (which I believe is how long zmq will block before dropping the frame) is always s

Re: qtgui install problem for gnuradio 3.8.1.0

Derek: Thanks much. I did see that OOT guide. So, I'll start another thread soon with my flowgraph woes. I miss those working flowgraphs! C On 8/10/20 2:04 PM, Derek Kozel wrote: Hi C, There is a porting guide for Out Of Tree modules, but not for flowgraphs. Many blocks are unaltered, WX

Re: Installing Error in Gr-Satellite

Hello Derek Thank you for your response I understand gr-satellite may not support GNU radio 3.9. Since gr-satellite installation was not working for me I tried installing gr-osmosdr with the help of this https://osmocom.org/projects/gr-osmosdr/wiki/GrOsmoSDR#Devicespecification I got a similar er

Re: qtgui install problem for gnuradio 3.8.1.0

Hi C, There is a porting guide for Out Of Tree modules, but not for flowgraphs. Many blocks are unaltered, WX is largely replacable with QT GUI elements, but there are areas where some functionality has been replaced, updated, or removed. If you find areas where no suitable replacement for a

Re: Installing Error in Gr-Satellite

Hello Yugal, Looking at the gr-satellites code I believe that it supports only GNU Radio 3.8 currently. It does not support the pre-release, development code that will become 3.9. Regards, Derek On 8/10/2020 9:08 PM, Yugal Joshi wrote: Thanks for replying Yeah I had installed all three dep

Re: Installing Error in Gr-Satellite

Thanks for replying Yeah I had installed all three dependencies mentioned in the official documentation of gr-satellite. On Tue, 11 Aug 2020 at 01:33, Vincenzo Mone wrote: > Have you installed: > > · libfec > > · construct

Re: qtgui install problem for gnuradio 3.8.1.0

Cinaed: Thanks for the reply. I received some out-of-list help and have been able to remove the qa and zmq test failures. The constellation failure remained, but I went ahead and built and installed gnuradio. I believe the root cause of the failures was (unsurprisingly I suppose) failure to *

Installing Error in Gr-Satellite

Hello all I am new to GNU Radio I was trying to install gr-satellite with this documentation https://gr-satellites.readthedocs.io/en/latest/installation.html Right now the GNU version I am using is 3.9.0.0 After cloning gr satellite I run following commands mkdir buildcd build cmake .. After c

Re: BladeRF 2.0 Micro - Using Bias Tees with GRC

Awesome, thank you so much for the help! It did end up being "bladerf=0,biastee=1" to enable it. Thank you again! Alex On Mon, Aug 10, 2020 at 2:55 PM Marcus D. Leech wrote: > On 08/10/2020 02:51 PM, Alex Batts wrote: > > Okay, so adding "biastee=(something)" to the "Device Arguments" > > sect

New block 'Stream Demux'

Hi all, I came across issue #1995 while looking for a 'Stream Demux' block and decided to write it myself. It seems to do the job (it was really just inverting the logic in 'Stream Mux') so I'm wondering if this is still useful for others. The OOT is at https://github.com/dave-pi/gr-stream_demux.

Re: BladeRF 2.0 Micro - Using Bias Tees with GRC

On 08/10/2020 02:51 PM, Alex Batts wrote: Okay, so adding "biastee=(something)" to the "Device Arguments" section of the osmocom sink/source should theoretically enable it? If so, do you know what these options would be, or at least where I can access the driver source code to examine it? Th

Re: BladeRF 2.0 Micro - Using Bias Tees with GRC

Okay, so adding "biastee=(something)" to the "Device Arguments" section of the osmocom sink/source should theoretically enable it? If so, do you know what these options would be, or at least where I can access the driver source code to examine it? Thank you, Alex On Mon, Aug 10, 2020 at 2:36 PM

Re: BladeRF 2.0 Micro - Using Bias Tees with GRC

On 08/10/2020 01:49 PM, Alex Batts wrote: Hello all, I am wondering if anyone that has used the bladeRF 2.0 micro with the bias tees was able to keep the bias tees enabled once executing a GRC flowgraph. I am able to enable the bias tees with the bladeRF-cli commands, but once I execute a GRC

BladeRF 2.0 Micro - Using Bias Tees with GRC

Hello all, I am wondering if anyone that has used the bladeRF 2.0 micro with the bias tees was able to keep the bias tees enabled once executing a GRC flowgraph. I am able to enable the bias tees with the bladeRF-cli commands, but once I execute a GRC flowgraph they become disabled. Note: I recog

Re: packetized audio transmission using GMSK modulation

Thank you for your reply. The version 3.7.13.4 was recommended by Ettus website (though it had not been updated recently) but anyway if it can really cause such problems I have to update to v3.8. Putting throttle in the flow graph didn't get any warning about "better not to use throttle when havi

Re: Problems with packet communication using BPSK

Did you account for the 0-180 phase ambiguity when demodulating BPSK? This would produce an inverted bitstream which wouldn't be noticeable when transmitting alternating 1s & 0s. @(^.^)@ Ed On 8/10/20 2:50 AM, Shruti Gupta wrote: Hi all! I am working on implementing BPSK communication syste

Re: Interested in Cognitive radios

Hey Kevin, Thanks a lot for sharing! I'll check it out. Thanks, Shreeram On Mon, 10 Aug, 2020, 8:55 PM Kevin McQuiggin, wrote: > Hi Shreeram: > > There was an interesting talk on AI and “cognitive radio” at the last > GRCON in Huntsville, Alabama in September 2019. > > Here’s the title and lin

Re: Interested in Cognitive radios

Hi Shreeram: There was an interesting talk on AI and “cognitive radio” at the last GRCON in Huntsville, Alabama in September 2019. Here’s the title and link: "Man or Machine?: Developing a "Turing Test" for Radio Intelligence” https://www.youtube.com/watch?v=kJ27aec_dZs&list=PLbBQHMnVMR41tOomyB

Re: FM Transmission with a vector of bits

Use the "Frequency Mod" block as a frequency modulator to make things simpler. The GUI Sink picture you show could be right. You're multiplying a 360 kHz square wave by another slower square wave and looking at the first harmonic. On Mon, Aug 10, 2020 at 7:54 AM Anthony B. wrote: > Hello, > > T

adaptive modulation in gnu radio

Hello everyone, I am looking towards how to make a flowgraph to detect when received signal strength is below -20 dB for instance. It'll automatically change modulation techniques to a low-order modulation (QPSK) and when more than -20 dB (say -10 dB). It'll take a high modulation technique (16QAM)

Re: packetized audio transmission using GMSK modulation

Hi Amir, you're right, the packet encoder and decoder have *long* been deprecated, because they sometimes simply drop data. Don't use them at all. Also, you're using GNU Radio 3.7. Don't use that to design new software, it's really in "legacy maintenance". The current stable release series i