Initial version - basis works

src/main.cpp

@@ -0,0 +1,78 @@
+#include <Arduino.h>
+#if defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(ESP32)
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <AsyncElegantOTA.h>
+#include <ESPAsyncWebServer.h>
+
+const char* ssid = "JoNelsDarlings";
+const char* password = "Paris2016";
+const int BUBBLE_GPIO = 4;
+boolean isBubbleFirstContact = true;
+unsigned long bubbleFreqSec = 0;
+unsigned long lastMillis = millis();
+
+AsyncWebServer server(80);
+
+void setup(void) {
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, LOW);
+  Serial.begin(115200);
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid, password);
+  Serial.println("");
+
+  // Wait for connection
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("");
+  Serial.print("Connected to ");
+  Serial.println(ssid);
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest* request) {
+    request->send(
+        200, "text/html",
+        "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)) +
+            "]"
+            "<script>window.setTimeout(_=>{window.location.reload();}"
+            ",1000)</script>");
+  });
+
+  AsyncElegantOTA.begin(&server);  // Start AsyncElegantOTA
+  server.begin();
+  Serial.println("HTTP server started");
+
+  pinMode(BUBBLE_GPIO, INPUT_PULLDOWN);
+  digitalWrite(LED_BUILTIN, HIGH);
+}
+
+void loop(void) {
+  // digitalWrite(LED_BUILTIN, digitalRead(BUBBLE_GPIO));
+
+  // This runs real fast, so make sure that only the "first contact" is measured
+  if ((digitalRead(BUBBLE_GPIO) == HIGH) && isBubbleFirstContact) {
+    digitalWrite(LED_BUILTIN, LOW);
+    if (millis() > lastMillis) {  // don't measure if we had an overflow...
+      bubbleFreqSec = (millis() - lastMillis) / 1000;
+    }
+    lastMillis = millis();
+    isBubbleFirstContact = false;
+  } else if ((digitalRead(BUBBLE_GPIO) == LOW)) {
+    isBubbleFirstContact = true;
+  }
+
+  // need to slow it down a bit to prevent fluctuating state cahange
+  delay(100);
+}