Beiträge von Tilman Vogel

Ok, kannst Du mir erklären, warum? Würde gerne dazulernen! Auf's Timing selbst kommt's ja nicht so exakt an, oder?

Hallo JuergenAC!

Sehr spannend. Ich überlege, ob ich damit den 0..10V-Steuereingang einer Grundfos-Umwälzpumpe ansteuern kann.

Eine Frage zu Deiner Schaltung: Das Schmitt-Trigger-NAND rekonstruiert das Signal zwar super, aber brauche ich das wirklich, wenn ich am Ende eh ein relativ langsames Analogsignal brauche? Würde mir da nicht einfach eine RC-Glättung reichen?

Oder ist das NAND für eine bessere Stabilisierung auch bei niederohmigerem Eingang?

Schöne Grüße,

Tilman

I have just started with Shelly with a Shelly Plus i4DC. I am calling web-hooks from Shelly script because I want to have toggle-on/toggle-off on single clicks with buttons. Doing that, I realized that depending on whether using SSL and certificate verification, web-hook calling via HTTP.GET is quite slow. And the delay happens in the SSL hand-shake which is why the actions triggered by the web-hook get delayed by seconds. This is not cool when the buttons are supposed to turn on lights (as quickly as possible in order not to make users in a public space believe, the button/light is broken).

I am observing for SSL with certificate validation 3.8 seconds, for SSL without certificate validation 1.6 seconds and without SSL 0.4 seconds (which would be good enough but I don't want to give up on SSL yet).

Those calls, done from my Linux machine with curl take 0.5 seconds with SSL and 0.3 seconds without SSL.

Is this known? Can I do something about it? Can it be improved in the firmware?

This is my Shelly script to test the delays:

function ping_ssl_ca() {
  print('SSL with CA check');
  
  time0 = Date.now()
  Shelly.call('HTTP.GET', { 
      url: 'https://echo.free.beeceptor.com/'
    }, 
    function(result) {
      print('Result received at', Date.now()-time0, 'ms');
      ping_ssl_noca();
    });
  print('Call done at', Date.now()-time0, 'ms');
}

function ping_ssl_noca() {
  print();
  print('SSL without CA check');
  time0 = Date.now()
  Shelly.call('HTTP.GET', { 
      url: 'https://echo.free.beeceptor.com/',
      ssl_ca: '*'
    }, 
    function(result) {
      print('Result received at', Date.now()-time0, 'ms');
      ping_nossl();
    });
  print('Call done at', Date.now()-time0, 'ms');
  }

function ping_nossl() {
  print();
  print('No SSL');
  time0 = Date.now()
  Shelly.call('HTTP.GET', { 
      url: 'http://echo.free.beeceptor.com/'
    }, 
    function(result) {
      print('Result received at', Date.now()-time0, 'ms');
    });
  print('Call done at', Date.now()-time0, 'ms');
}

ping_ssl_ca();

PS. I had submitted this post already yesterday - today the post and my account were gone. The forum was also offline this morning. Was there an outage and my sign-up and post were lost?