Re: [Discuss-gnuradio] Flowgraph heartbeat pulse

2018-04-01 Thread Milos Milosavljevic
Thank you all every much on the ideas. I appreciate it. I have initially thought about using UDP in the similar manner you suggested and I guess I will start with that one first and probably try other methods if that doesnt work. By the way, I was not clear about "continuous" mode of operation. Ap

Re: [Discuss-gnuradio] Flowgraph heartbeat pulse

2018-04-01 Thread CEL
That sounds very feasible! But, again, if all that happens is actually a hardware source overflowing, and dropping a single let's say 200 sample packets, this might be hard to detect externally if "Keep 1 in N" has an N > 200 or so to reliably detect a single missed packet, and that might mean you

Re: [Discuss-gnuradio] Flowgraph heartbeat pulse

2018-04-01 Thread Gilad Beeri (ApolloShield)
Thanks for the Throttle insights :) If there's a hardware source in the flowgraph, maybe he can leverage the source's clock, and use source -> Keep 1 in N -> sink? Or write a custom UDP sink that connects directly to the source, and implements some kind of "Send 1 for every N items" internally? O

Re: [Discuss-gnuradio] Flowgraph heartbeat pulse

2018-04-01 Thread CEL
Be a bit careful there, Throttle doesn't work like that! Throttle will sleep for as long as it takes to pass the number of input items it sees. For example, if you connected Constant Source(1) -> Throttle (1 S/s) -> UDP Sink Then, on start of the flow graph, "constant source" will produce e.g.

Re: [Discuss-gnuradio] Flowgraph heartbeat pulse

2018-03-31 Thread Gilad Beeri (ApolloShield)
Might work for you: Any kind of source, throttled to 1/HEARTBIT_INTERVAL, to a UDP sink. Example: Constant Source(1) -> Throttle (1 S/s) -> UDP Sink will write the number 1 to the designated UDP sink, once every second. On Sun, Apr 1, 2018 at 12:22 AM Milos Milosavljevic < milos.milosavlje...@spi

[Discuss-gnuradio] Flowgraph heartbeat pulse

2018-03-31 Thread Milos Milosavljevic
Hi All, I was wondering if someone can give me some hints on the below please. I have a flowgraph running continuously demodulating some off air signals and spitting out meta data about the parameters, calculated SNRs, BER, freq offset estimations, etc. That meta and output data is parsed regular