MSGID:  bca5a1e5   
   REPLY:  990e9675   
   PID: PyGate 1.5.2   
   TID: PyGate/Linux 1.5.2   
   CHRS: ASCII 1   
   TZUTC: 1100   
   REPLYADDR c186282@nnada.net   
   REPLYTO 3:633/10 UUCP   
   On 12/12/25 06:41, Andy Burns wrote:   
   > The Natural Philosopher wrote:   
   >    
   >> Well the daemon runs under xinetd...for sheer laziness. I guess I    
   >> could make it UDP.   
   >>   
   >> But I don't know what problem that would solve.   
   >    
   > The data would arrive if a single packet got through the fog, whereas    
   > with tcp at least dour packets on sequence need to make it (or get    
   > retried) with UDP you could afford to spray each packet half a dozen    
   > times and if one of them makes it, you're good ...   
      
      I once made a bi-directional client/server setup,   
      first Python, then 'C'. One variant was TCP, the   
      other UDP. Probably could have used a config file   
      or defs ... but I never got to it.   
      
      On a clean LAN, both worked perfectly. However   
      with some outdoor devices (Pi2 + wifi dongle as   
      best I recall) both approaches had issues kind   
      of similar to what you described.   
      
      TCP, while "error resistant", was often VERY iffy.   
      UDP - well - easier/smaller to send. You could   
      scan each packet for obvious errors and, if a   
      fail, could ask for it again or just let the   
      pgm work around to sending that data again.   
      
      For almost all modern apps, TCP is best by far.   
      However iffy situations CAN still exist, so   
      UDP you add some IQ to MIGHT be better.   
      
      As I've said elsewhere, wifi can sometimes be   
      black magic. Weird RF shadows and multipaths   
      can be anywhere and it's very hard to tell   
      what's perfect placement.   
      
      Hmm ... apparently CANbus can be sent over   
      wifi - but you lose some error-checking so   
      there's no gain. There are various dongles   
      for lower-freq data transmission too, but   
      never got around to trying them. Fidelity   
      might be worth losing some speed.   
      
      
   --- PyGate Linux v1.5.2   
    * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)   
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