Hi Vittorio,not sure I get it, according to [1], [2] and [3] linked below it is clear, that the variable name configured as parameter is used, and the actual <name> of the message pair is ignored.
Are you suggesting to to put all my variables in a single "meta variable" of dict type? I.e. something like `meta_var = {"freq": 1e6, "gain": 5}` and then access it like `meta_var["freq"]` instead of just `freq`? That's an interesting approach, but it would require to change all variables in the flowgraph, and to always send all variables even if you only want to change a single one, right?
Best Philipp [1] https://wiki.gnuradio.org/index.php/Message_Pair_to_Var [2] https://github.com/gnuradio/gnuradio/issues/6574[3] https://github.com/gnuradio/gnuradio/blob/8cbd8526b50a96188119d11bf69b2fc701edb38a/gr-blocks/python/blocks/msg_pair_to_var.py
Am 27.1.25 um 17:33 schrieb vitt...@pm.me:
Good evening everybody! Regarding this:"...PS: I found that the "Message Pair to Var" block is not very flexible, since it only allows to set one specific variable...."Actually a variable can also be a dictionary: simply creates a dictionary in which tag/value pairs refer to other variables. In a mine (never finished) project I'm using this to transfer several settings (TX_freq, RX_freq, various gains, PTT) between a remote RF head (Pluto+ and amplifiers) and a local CONTROL unit, over ZMQ sockets with very good resultsI hope it can be helpful... Vittorio, I3VFJ fingerprint: |fb5f492a54e016c632c933d3ee4b7e38203c79ca| Inviato con l'email sicura Proton Mail <https://proton.me/mail/home>.lunedì 27 gennaio 2025 09:16, Philipp Niedermayer <p.niederma...@gsi.de> ha scritto:Dear Muhammad,you can use ZMQ blocks to send messages to your GR program. Either directly to the message port of USRP sink, or use a "Message Pair to Var" block to update a flowgraph variable. You can read more about these blocks here:* https://wiki.gnuradio.org/index.php/Understanding_ZMQ_Blocks * https://wiki.gnuradio.org/index.php/Message_Pair_to_VarPS: I found that the "Message Pair to Var" block is not very flexible, since it only allows to set one specific variable. I am currently working on a similar block that allows me to change multiple variables based on the message car, so that I can control my flowgraph by sending (variable_name, value) message pairs. Once I got it to work, and if there is interest, I could open a PR.Best Philipp Am 25.1.25 um 8:08 schrieb Muhammad Anas:Dear GNU Radio Community,I'm working on a project to control a USRP channel frequency from QT creater GUI application, is it possible to implement a communication between QT and GRC using xmlrpm or tcp block etc to control the GRC parameters in real-time on the same computer in window.Kindly help me to achieve this communication. Regards Muhammad Anas
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