ESP32 : Faire clignoter une LED sans monopoliser le programme

// Hygro relevée chambre
setInterval(function getHygroChambre()
{
    var xhttp = new XMLHttpRequest();
 
    xhttp.onreadystatechange = function()
    {
        if(this.readyState == 4 && this.status == 200)
        {
            document.getElementById("hygroChambre" ).innerHTML = this.responseText;
        }
    };
 
    xhttp.open("GET", "getHygroChambre", true);
    xhttp.send();
}, 5000);

// Hygro relevée chambre
  serveurVR.on("/getHygroChambre", HTTP_GET, [](AsyncWebServerRequest *request)
  {
    String str = String(hygroChambre);
    str = str.substring(0, (str.length()-1));
    str+="%";
    request->send(200, "text/plain", str);
  });

1. void blinkTheLed()  {
3.   unsigned long currentMillis = millis();
5.   if (currentMillis - previousMillis >= blinkInterval)  {
6.    
7.     ledState = (ledState == LOW) ? HIGH : LOW;
8.     digitalWrite(led, ledState);
9.     previousMillis = currentMillis;
10.   }
11. }
14. void decreaseBypass()  {
16.   unsigned long currentMillisForBypass = millis();
18.   if (currentMillisForBypass - previousMillisForBypass >= 60000)  {
19.     bypass--;
20.     previousMillisForBypass = currentMillisForBypass;
21.   }
23. }

1. serveurVR.on("/getSeuilTempChambre", HTTP_GET, [](AsyncWebServerRequest *request)
2.   {
3.     String str = String(seuilTempChambre);
4.     request->send(200, "text/plain", str);
5.   }); 
7.   serveurVR.on("/plusTempChambreButton", HTTP_GET, [](AsyncWebServerRequest *request)
8.   {
9.     seuilTempChambre++;
10.     request->send(200);
11.   }); 
13.   serveurVR.on("/moinsTempChambreButton", HTTP_GET, [](AsyncWebServerRequest *request)
14.   {
15.     seuilTempChambre--;
16.     request->send(200);
17.   });

1. setInterval(function getSeuilTempChambre()
2. {
3.     var xhttp = new XMLHttpRequest();
5.     xhttp.onreadystatechange = function()
6.     {
7.         if(this.readyState == 4 && this.status == 200)
8.         {
9.             document.getElementById("seuilTempChambre" ).innerHTML = this.responseText;
10.         }
11.     };
13.     xhttp.open("GET", "getSeuilTempChambre", true);
14.     xhttp.send();
15. }, 2000);
17. function plusTempChambreButton()  {
19.     var xhttp = new XMLHttpRequest();
20.     xhttp.open("GET", "plusTempChambreButton", true);
21.     xhttp.send();
23. }
25. function moinsTempChambreButton()  {
27.     var xhttp = new XMLHttpRequest();
28.     xhttp.open("GET", "moinsTempChambreButton", true);
29.     xhttp.send();
31. }

1. digitalWrite( ledpin , millis() / 500 % 2 );