# Sending text command from TransceiverA to transceiverB

**URL:** <https://www.ruby-forum.com/t/sending-text-command-from-transceivera-to-transceiverb/239693>\
**Category:** GNU Radio\
**Created:** [March 10, 2014, 7:40pm UTC](https://www.ruby-forum.com/t/sending-text-command-from-transceivera-to-transceiverb/239693 "2014-03-10T19:40:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [March 10, 2014, 7:40pm UTC](https://www.ruby-forum.com/t/sending-text-command-from-transceivera-to-transceiverb/239693/1 "2014-03-10T19:40:49Z")

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Hi GR,

I have two transceivers running on two machines (TransceiverA flowgraph  
and  
TransceiverB flowgraph) and I want at some point in time send a text  
command  
from transceiver A containing the value of a parameter (gain) to  
configure  
transceiver B.

I have tried to call again the whole initial transceiverA flowgraph from  
within the one running but this time the signal source is the text of  
the  
command that I am about to send  
BUT when it calls it the flow-graph freezes and no longer respond,  
When I Ctl-C I got “Segmentation fault (core dumped)”

I am pretty sure there is another elegant and functional way to code  
that.  
Any hints or help is appreciated.

Regards,

–  
View this message in context:  
[http://gnuradio.4.n7.nabble.com/Sending-text-command-from-TransceiverA-to-transceiverB-tp46840.html](http://gnuradio.4.n7.nabble.com/Sending-text-command-from-TransceiverA-to-transceiverB-tp46840.html)  
Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com).

---

<div class="post-metadata">

**Author:** ![naeo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/57b2e6/32.png) [@naeo](https://www.ruby-forum.com/u/naeo)\
**Post date:** [March 10, 2014, 10:40pm UTC](https://www.ruby-forum.com/t/sending-text-command-from-transceivera-to-transceiverb/239693/2 "2014-03-10T22:40:03Z")

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On 03/10/2014 07:39 PM, Ruecan wrote:

> BUT when it calls it the flow-graph freezes and no longer respond,  
> When I Ctl-C I got “Segmentation fault (core dumped)”
> 
> I am pretty sure there is another elegant and functional way to code that.  
> Any hints or help is appreciated.

Ruecan,

this is a bit vague, and you’re not really providing us with enough  
information to help you. There’s tons of reasons a flow graph could  
segfault. Try and narrow down the component that’s segfaulting, and  
without seeing your code, noone will be able to give you good advice.

M