Re: [Discuss-gnuradio] Why am I dropping data over the UDP network?

[Ward, Marcus D.]

I don't think it's a firewall rule problem, but do you think opening up ports 
would solve my problem? I know the port I'm currently using on the TCP 
connection is port#: 1234 which deals with Mercurial and git default ports for 
serving Hyper Text.

When I had the UDP connection, I was using the same port (1234) except that in 
UDP, that port deals with a VLC media player.

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Marcus D. Leech
Sent: Tuesday, July 15, 2014 3:02 PM
To: address@hidden
Subject: Re: [Discuss-gnuradio] Why am I dropping data over the UDP network?

On 07/15/2014 02:58 PM, Ward, Marcus D. wrote:
> And the firmware in the device matches the UHD you have? Based on my 
> structure, the firmware should be matching (since when I did the flow graph 
> with the UDP, everything went fine except for data loss) and correct me if 
> I'm wrong, but an error would come on saying that the firmware is not 
> compatible?
A very-old firmware/FPGA image with a modern UHD may yield a "I can't find the 
device" error, such as you've seen.

>
> Assuming that there's nothing *else* on the network connection between the 
> host computer and the USRP device, that's the only thing I can think
>     of that might cause it to be pingable, but UHD can't communicate with it, 
> unless you have firewall rules preventing communications at the
>     UHD layer...
>
> I'll dig into it more to see what else I can come up with.
>
> Thank You,
> Marcus
>
> -----Original Message-----
> From: address@hidden 
> [mailto:address@hidden On 
> Behalf Of Marcus D. Leech
> Sent: Tuesday, July 15, 2014 2:08 PM
> To: address@hidden
> Subject: Re: [Discuss-gnuradio] Why am I dropping data over the UDP network?
>
> On 07/15/2014 01:57 PM, Ward, Marcus D. wrote:
>> On the machine that has the USRP connected  (presumable this is a N2xx or 
>> USRP2?), what does:
>>
>> ping 192.168.10.2
>>
>> return?
>>
>> Ping 192.168.10.2 is returning data
>>
>> what does uhd_usrp_probe --args "addr=192.168.10.2"
>>
>> Return?
>>
>>    This returns an error message:
>> RuntimeError: LookupError: KeyError: No devices found for -------->
>>> Device Address:
>>>     Addr: (192.168.10.2)
> And the firmware in the device matches the UHD you have?
>
> Assuming that there's nothing *else* on the network connection between the 
> host computer and the USRP device, that's the only thing I can think
>     of that might cause it to be pingable, but UHD can't communicate with it, 
> unless you have firewall rules preventing communications at the
>     UHD layer...
>
>
>> -----Original Message-----
>> From: address@hidden
>> [mailto:address@hidden On 
>> Behalf Of Marcus D. Leech
>> Sent: Tuesday, July 15, 2014 1:35 PM
>> To: address@hidden
>> Subject: Re: [Discuss-gnuradio] Why am I dropping data over the UDP network?
>>
>> On 07/15/2014 01:21 PM, Ward, Marcus D. wrote:
>>> Ok so now I went to try out my architecture this time with a TCP source and 
>>> sink. I have pictures included where the sending side is 
>>> (TCPrecievestation) and the receiving side is (TCPreceivedisplaystation).
>>>
>>> On the (TCPreceievestation), the last three lines in the bottom window is 
>>> as follows:
>>> RuntimeError: LookupError: KeyError: No devices found for --------> 
>>> Device Address:
>>>     Addr: (My USRP's IP address)
>>>
>>>
>>> On the (TCPreceievedisplaystation), all I am getting is this:
>>> using volk machine: avx_64_mmx_orc
>>>
>>> To add, I have scopes for both the sending and receiving end, but as I run 
>>> them, the plots do not show.
>>>
>>> Is there something that I could be missing since I am dealing with TCP and 
>>> not UDP?
>>>
>> One thing I noticed immediately is that you have the sample rate set to 32k, 
>> which is not a valid sample rate for ANY USRP hardware.
>>
>> On the machine that has the USRP connected  (presumable this is a N2xx or 
>> USRP2?), what does:
>>
>> ping 192.168.10.2
>>
>> return?
>>
>> what does uhd_usrp_probe --args "addr=192.168.10.2"
>>
>> Return?
>>
>>
>>
>>
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