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Issues and Errors
16

I don’t understand what you are using the sync commands for… I was referring to the set property ones.

As long as the Blynk.setproperty() commands come after the Blynk connection routines, they should work just fine in setup()

… or as stated, just use the BLYNK_CONNECTED() function, but perhaps with a bunch of Lambda Timer Functions and timout timers.

For example, a set of four commands every two seconds. Play with the timing… perhaps 1/2 or 1 second between each batch; More or less commands per batch, etc.

BLYNK_CONNECTED() {

  // Batch 1
  Blynk.setProperty(V29, "offBackColor", "#FFFFFF");
  Blynk.setProperty(V27, "onBackColor", "#FFFFFF");
  Blynk.setProperty(V27, "offBackColor", "#FFFFFF");
  Blynk.setProperty(V30, "onBackColor", "#FFFFFF");


  // Timed Lambda Function - Batch 2
  timer.setTimout(2000L, []() {  // Run in two seconds
  Blynk.setProperty(V30, "offBackColor", "#FFFFFF");
  Blynk.setProperty(V31, "onBackColor", "#FFFFFF");
  Blynk.setProperty(V31, "offBackColor", "#FFFFFF");
  Blynk.setProperty(V32, "onBackColor", "#FFFFFF");
  });

  // Timed Lambda Function - Batch 3
  timer.setTimout(4000L, []() {  // Run in four seconds
  Blynk.setProperty(V32, "offBackColor", "#FFFFFF");
  Blynk.setProperty(V33, "onBackColor", "#FFFFFF");
  Blynk.setProperty(V33, "offBackColor", "#FFFFFF");
  Blynk.setProperty(V34, "offBackColor", "#FFFFFF");
  });

  // and so on...

}