[PD] udpsend: unsure about raw data

[ub]

On 24.05.20 16:07, rolfm at dds.nl wrote:
> thanks Andy,
>
> in my case i'm sending to NodeMCU's (a breakoutboard with ESP8266 chip).
> so..

not a problem, you can listen at any node in the ethernet connection.

just change the -i parameter to the interface running the connection to 
your board.

get the list of interfaces with ifconfig or ip addr.



>
> rolf
>
> Andy Farnell schreef op 24-05-2020 14:26:
>> If it's a question of efficiency, to be really really sure,
>> maybe read the UDP packets off the wire/port with tcpdump,
>> which despite its name is quite happy to capture and show
>> UDP too.
>>
>> tcpdump -i lo udp port 9000 -vv -X
>>
>> You'll see any byte order munging or padding
>> due to some NIC/network stack setups. On
>> my Debian systems it is indeed plain bytes.
>>
>> a.
>>
>> On Sun, May 24, 2020 at 01:31:53PM +0200, rolfm at dds.nl wrote:
>>> hi,
>>>
>>> i want to minimize the data stream send through an UDP connection
>>>
>>> by sending 'coded' bytes; the receiver(s) will decode them.
>>>
>>> i'm unsure about the meaning of 'raw data' in the helpfile of 
>>> [udpsend].
>>>
>>>
>>> does [1 2 3( represent bytes with the octal vaue 001 002 003,
>>>
>>> or the  integers 1 2 3 which will be 'translated' into the octal bytes
>>> 061 062 063 ?
>>>
>>> it's a bit ambigious for me, especially comparing the helpfiles of
>>> [iemnet/udpsend] and [mrpeach/udpsend].
>>>
>>> with the iemnet version one cannot send files directly, it's necessary
>>> to use [binfile].
>>>
>>> does it mean that the mrpeach version recognizes that a file is used 
>>> for
>>> input;
>>>
>>> wow that [binfile] is embedded in its [udpsend]?
>>>
>>> rolf
>>
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>
>
>
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