added deep sleep mode to save battery life

WorkerNode/NodeMCWifi/NodeMCWifi.ino

@@ -21,14 +21,6 @@ const char* password = "AndyNicoChiara";
 
 const char* serverName = "http://192.168.178.154/sensordata";
 
-// the following variables are unsigned longs because the time, measured in
-// milliseconds, will quickly become a bigger number than can be stored in an int.
-unsigned long lastTime = 0;
-// Timer set to 10 minutes (600000)
-//unsigned long timerDelay = 600000;
-// Set timer to 5 seconds (5000)
-unsigned long timerDelay = 5000;
-
 // Moisture sensor variables
 int sense_Pin = 0; // sensor input at Analog pin A0
 int value = 0;
@@ -36,6 +28,9 @@ int value = 0;
 //Sensor Pin an dVariable
 int pos = 0;
 
+//Konstante für die Zeit in min
+const int timer = 30;
+
 void setup() {
    Serial.begin(9600);
    dht.begin();
@@ -50,9 +45,10 @@ void setup() {
    Serial.print("Connected to WiFi network with IP Address: ");
    Serial.println(WiFi.localIP());
 
-   Serial.println("Timer set to 5 seconds (timerDelay variable), it will take 5 seconds before publishing the first reading.");
-
    myservo.attach(D4);
+
+   while(!Serial);
+   Serial.println("Waking up ...");
 }
 
 
@@ -67,12 +63,13 @@ void loop() {
   float temperature = dht.readTemperature();
   Serial.print("Temperatur: ");
   Serial.print(temperature);
-  Serial.println("%");
+  Serial.println("°C");
   delay(1000);
 
-  Serial.print("°C, Luftfeuchtigkeit: "); 
+  Serial.print("Luftfeuchtigkeit: "); 
   Serial.print(humidity);
-
+  Serial.println("%");
+  /*
   for(pos = 0; pos < 180; pos += 1) {  // von 0 bis 180 Grad, in Schritten von einem Grad
     myservo.write(pos);                   // sagt dem Servomotor, in welche Position sich drehen soll      
     delay(15);                            // wartet 15 Millisekunden   
@@ -81,17 +78,14 @@ void loop() {
     myservo.write(pos);
     delay(15);
   }
+  */
 
-/*
-if ((millis() - lastTime) > timerDelay) {
-    //Check WiFi connection status
   if(WiFi.status()== WL_CONNECTED){
     WiFiClient client;
     HTTPClient http;
     
     // Your Domain name with URL path or IP address with path
     http.begin(client, serverName);
-  
     // Specify content-type header
     http.addHeader("Content-Type", "application/x-www-form-urlencoded");
     // Data to send with HTTP POST
@@ -116,7 +110,14 @@ if ((millis() - lastTime) > timerDelay) {
   else {
     Serial.println("WiFi Disconnected");
   } 
-    lastTime = millis();
+  Serial.println("Going to deep sleep...");
+  ESP.deepSleep(timer * 1000000);
+  yield();
 }
-  */
+
+
+void startDeepSleep(){
+  Serial.println("Going to deep sleep...");
+  ESP.deepSleep(5 * 1000000);
+  yield();
 }