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   RBERRYPI      Support for the Raspberry Pi device      21,939 messages   

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   Message 20,768 of 21,939   
   druck to All   
   1-wire behaviour on Bookworm   
   19 Sep 24 10:36:16   
   
   INTL 3:770/1 3:770/3   
   REPLYADDR news@druck.org.uk   
   REPLYTO 3:770/3.0 UUCP   
   MSGID:  46fbd903   
   PID: SoupGate-Win32 v1.05   
   After getting another Pi 5, I've moved a Pi 4B running Bookworm in to   
   the role taken by a Pi 3B running Bullseye, which is monitoring 6   
   ds18b20 sensors, configured as 2 1-wire buses with 3 sensors on each.   
      
   With the Pi 3B, I could either read the sensors sequentially taking   
   about 0.9s each, or using threads simultaneously in 1.0s. The Pi 4B with   
   Bookworm reads the sensors sequentially a shade faster at just over   
   0.8s, but when reading simultaneously, returns 2 after 0.8s, another 2   
   after 1.6s and the last two at 2.4s.   
      
   Anyone have an explanation for this?   
      
   It's not a problem as I changed some time ago from performing one   
   simultaneous read every 5 minutes to reading sequentially every minute   
   and averaging over 15 minutes.   
      
   ---druck   
      
   --- SoupGate-Win32 v1.05   
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)   
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