Touch sensor use version works

src/main.cpp

@@ -9,8 +9,9 @@ const char* ssid = "JoNelsDarlings";
 const char* password = "Paris2016";
 const int BUBBLE_GPIO = 4;
 boolean isBubbleFirstContact = true;
-unsigned long bubbleFreqSec = 0;
+double bubbleFreqSec = 0;
 unsigned long lastMillis = millis();
+unsigned int bVal;
 
 AsyncWebServer server(80);
 
@@ -65,7 +66,7 @@ void setup(void) {
         "Hi! This is the Wine-Sensor. Last bubble frequency: every <b>" +
             String(bubbleFreqSec) + "</b> Seconds. [" + String(millis()) + "/" +
             String(lastMillis) + "/" + String(isBubbleFirstContact) + "/" +
-            String(digitalRead(BUBBLE_GPIO)) +
+            String(bVal) +
             "]"
             "<script>window.setTimeout(_=>{window.location.reload();}"
             ",1000)</script>");
@@ -74,25 +75,30 @@ void setup(void) {
   AsyncElegantOTA.begin(&server);  // Start AsyncElegantOTA
   server.begin();
   Serial.println("HTTP server started");
-
-  pinMode(BUBBLE_GPIO, INPUT_PULLUP);
 }
 
 void loop(void) {
-  digitalWrite(LED_BUILTIN, digitalRead(BUBBLE_GPIO));
+  bVal = touchRead(BUBBLE_GPIO);
+  if (bVal == 0) {
+    digitalWrite(BUILTIN_LED, HIGH);
+  } else {
+    digitalWrite(BUILTIN_LED, LOW);
+  }
+  // writeToOled("* " + String(bVal));
 
   // This runs real fast, so make sure that only the "first contact" is measured
-  if ((digitalRead(BUBBLE_GPIO) == LOW) && isBubbleFirstContact) {
+  if ((bVal == 0) && (isBubbleFirstContact)) {
     if (millis() > lastMillis) {  // don't measure if we had an overflow...
-      bubbleFreqSec = (millis() - lastMillis) / 1000;
-      writeToOled("Freq: " + String(bubbleFreqSec));
+      bubbleFreqSec = (double)(millis() - lastMillis) / 1000;
     }
     lastMillis = millis();
     isBubbleFirstContact = false;
-  } else if ((digitalRead(BUBBLE_GPIO) == HIGH)) {
+  } else if (0 != bVal) {
     isBubbleFirstContact = true;
   }
 
+  writeToOled("F:" + String(bubbleFreqSec, 2) + "\n[" + String(bVal) + "]");
+
   // need to slow it down a bit to prevent fluctuating state cahange
-  delay(100);
+  delay(10);
 }