tested

Test/Test/src/SimulatedESP8266.cpp

+/**
+ * @file SimulatedESP8266.cpp
+ * @author Samuel Helbling (samuel.helbling@ost.ch)
+ * @brief 
+ * @version 0.1
+ * @date 2021-04-29
+ * 
+ * @copyright Copyright (c) 2021
+ * 
+ */
+
+#include "Arduino.h"
+#include "SimulatedESP8266.h"
+
+#define DEBUG false // set to TRUE to get more informations during runtime
+uint8_t m_responseBuffer[300] = {0};
+
+SimulatedESP8266::SimulatedESP8266(int rxPin, int txPin) : rxPin{rxPin}, txPin{txPin}
+{
+}
+
+void SimulatedESP8266::setup()
+{
+  espSerial.begin(115200);
+
+  espData("AT+RST", 10, DEBUG);                     //Reset the ESP8266 module
+  espData("AT+CWMODE=1", 10, DEBUG);                //Set the ESP mode as station mode
+  espData("AT+CWJAP=\"VBB\",\"12345\"", 10, DEBUG); //Connect to WiFi network
+  Serial.println("ESP ready");
+}
+
+String SimulatedESP8266::httpGet(String host, String endpoint, String protocol = "80")
+{
+  Serial.println("Sending HTTP Get-Request");
+  String sendData = "GET " + endpoint;
+  espData("AT+CIPMUX=1", 10, DEBUG); //Allow multiple connections
+  espData("AT+CIPSTART=0,\"TCP\",\"" + host + "\"," + protocol, 10, DEBUG);
+  espData("AT+CIPSEND=0," + String(sendData.length() + 4), 10, DEBUG);
+  espSerial.find('>');
+  String response = espData(sendData, 10, DEBUG);
+  espData("AT+CIPCLOSE=0", 10, DEBUG);
+  return response;
+}
+
+String SimulatedESP8266::httpPost(String host, String endpoint, String payload, String protocol = "80")
+{
+  Serial.println("Sending HTTP Post-Request");
+  String sendData = "POST " + endpoint +" HTTP/1.1\r"
+  + "Host: " + host + "\r"
+  + "Content-Type: text/plain\r"
+  + "Content-Length: " + payload.length() + "\r\r"
+  + payload;
+  espData("AT+CIPMUX=1", 10, DEBUG); //Allow multiple connections
+  espData("AT+CIPSTART=0,\"TCP\",\"" + host + "\"," + protocol, 10, DEBUG);
+  espData("AT+CIPSEND=0," + String(sendData.length() + 4), 10, DEBUG);
+  espSerial.find('>');
+  String response = espData(sendData, 10, DEBUG);
+  espData("AT+CIPCLOSE=0", 10, DEBUG);
+  return response;
+}
+
+String SimulatedESP8266::espData(String command, long timeout, boolean debug)
+{
+  String response = "";
+  espSerial.println(command);
+  long time = millis();
+  while ((time + timeout) > millis())
+  {
+    while (espSerial.available())
+    {
+      char c = espSerial.read();
+      response += c;
+    }
+  }
+  return response;
+}
+

Test/Test/src/SimulatedESP8266.h

+/**
+ * @file SimulatedESP8266.h
+ * @author Samuel Helbling (samuel.helbling@ost.ch)
+ * @brief 
+ * @version 0.1
+ * @date 2021-04-29
+ * 
+ * @copyright Copyright (c) 2021
+ **/
+
+#include "Arduino.h"
+#include <SoftwareSerial.h> //Software Serial library
+
+#ifndef SIMULATEDESP8266
+#define SIMULATEDESP8266
+
+class SimulatedESP8266 {
+
+public:
+    SimulatedESP8266(int rxPin, int txPin);
+    void setup();
+    String httpGet(String host, String endpoint, String protocol = "80");
+    String httpPost(String host, String endpoint, String payload, String protocol = "80");
+
+private:
+    int txPin;
+    int rxPin;
+    String espData(String command, long timeout, boolean debug);
+    SoftwareSerial espSerial = SoftwareSerial(rxPin,txPin);
+};
+
+#endif

Test/Test/src/main.cpp

 #include <Arduino.h>
 #include "AirSensor.h"
+#include "SimulatedESP8266.h"
 
     int ventilatorPinIN1 {7};
     int ventilatorPinIN2 {6};
@@ -11,6 +12,15 @@
     const float thresholdVentilatorMax{0.6};
     float airQuality;
 
+    const int RX_PIN{11};
+    const int TX_PIN{12};
+    String myHost = "104.248.41.20:1890";
+
+    SimulatedESP8266 simulatedESP8266{RX_PIN, TX_PIN};
+
+
+
+
 void setup() {
     pinMode(ventilatorPinEN, OUTPUT);
     pinMode(ventilatorPinIN1, OUTPUT);
@@ -22,9 +32,13 @@ void setup() {
     digitalWrite(ventilatorPinIN2, LOW);
     Serial.println(thresholdVentilatorMax);
     Serial.println(thresholdVentilatorStart);
+
+    simulatedESP8266.setup();
     ;
 }
 
+
+
 void loop() {
     airQuality = airSensor.getAirQuality();
 
@@ -46,4 +60,9 @@ void loop() {
     Serial.println(ventilatorSpeed);
     delay(500);
 
+    String payloadAirQuality = "{\"Luftqualität\":" + String(airQuality);
+  payloadAirQuality = payloadAirQuality +"}";
+
+  simulatedESP8266.httpPost(myHost, "/airQuality", payloadAirQuality);
+    
 }
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