diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..89cc49c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..080e70d
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..4ea5c30
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,6 @@
+{
+    "gitea.instanceURL": "https://hjkgitunix.dedyn.io/",
+    "gitea.owner": "hans-jurgen",
+    "gitea.repo": "Wetterstation",
+    "gitea.token": " vscodegitea"
+}
\ No newline at end of file
diff --git a/data/Korektur.txt b/data/Korektur.txt
new file mode 100644
index 0000000..c2302eb
--- /dev/null
+++ b/data/Korektur.txt
@@ -0,0 +1 @@
+1.02910
diff --git a/data/status.txt b/data/status.txt
new file mode 100644
index 0000000..3d2c52f
--- /dev/null
+++ b/data/status.txt
@@ -0,0 +1 @@
+5
diff --git a/include/README b/include/README
new file mode 100644
index 0000000..45496b1
--- /dev/null
+++ b/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
diff --git a/include/mcp9808.h b/include/mcp9808.h
new file mode 100644
index 0000000..d9fb28a
--- /dev/null
+++ b/include/mcp9808.h
@@ -0,0 +1,63 @@
+#include <Arduino.h>
+/*  Daten:
+ *  Temperaturbereich -40 bis 125°C
+ *  Genauigkeit: ± 0,25°C
+ *  Auflösung: 0,0625°C
+ */
+#include <Wire.h>
+#include "Adafruit_MCP9808.h"
+float valTemp;
+
+// Create MCP9808 temperature sensor object
+Adafruit_MCP9808 tempsensor = Adafruit_MCP9808();
+
+char Temperature[15] = {0};
+
+void init_MCP9808(){
+    // Make sure the sensor is found, you can also pass in a different i2c
+  // address with tempsensor.begin(0x19) for example, also can be left in blank for default address use
+  // Also there is a table with all addres possible for this sensor, you can connect multiple sensors
+  // to the same i2c bus, just configure each sensor with a different address and define multiple objects for that
+  //  A2 A1 A0 address
+  //  0  0  0   0x18  this is the default address
+  //  0  0  1   0x19
+  //  0  1  0   0x1A
+  //  0  1  1   0x1B
+  //  1  0  0   0x1C
+  //  1  0  1   0x1D
+  //  1  1  0   0x1E
+  //  1  1  1   0x1F
+  if (!tempsensor.begin(0x18)) {
+    Serial.println("Couldn't find MCP9808! Check your connections and verify the address is correct.");
+    datenSave(-20);
+    while (1);
+  }
+  Serial.println("Found MCP9808!");
+  tempsensor.setResolution(3); // sets the resolution mode of reading, the modes are defined in the table bellow:
+  // Mode Resolution SampleTime
+  //  0    0.5°C       30 ms
+  //  1    0.25°C      65 ms
+  //  2    0.125°C     130 ms
+  //  3    0.0625°C    250 ms
+}
+
+
+float getTemperature_MCP9808(){
+   // Wake up MSP9808 - power consumption ~200 mikro Ampere
+  tempsensor.wake();
+  float temperature = tempsensor.readTempC();
+  tempsensor.shutdown();
+  dtostrf(temperature,7,1,Temperature);
+  Serial.print("Temperatur (MCP9808):\t");
+  Serial.print(Temperature);
+  Serial.println(" °C");
+  tempsensor.shutdown_wake(1); // shutdown MSP9808 - power consumption ~0.1 mikro Ampere, stops temperature sampling
+  return temperature;
+}
+
+void M2M_Temperatur_MCP9808(String deviceId = "4711") {
+    char topic[100];
+    dtostrf(valTemp,7,1,Temperature);
+    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/temperature_MCP9808");
+    client.publish(topic, Temperature, true);
+}
\ No newline at end of file
diff --git a/include/messADS1115.h b/include/messADS1115.h
new file mode 100644
index 0000000..84bcbb0
--- /dev/null
+++ b/include/messADS1115.h
@@ -0,0 +1,150 @@
+/***************************************************************************
+* Example sketch for the ADS1115_WE library
+*
+* This sketch shows how to use the ADS1115 in single shot mode. 
+*  
+* Further information can be found on:
+* https://wolles-elektronikkiste.de/ads1115 (German)
+* https://wolles-elektronikkiste.de/en/ads1115-a-d-converter-with-amplifier (English)
+* 
+***************************************************************************/
+#include <Arduino.h>
+#include<ADS1115_WE.h> 
+#include<Wire.h>
+#define I2C_ADDRESS 0x48
+
+/* There are several ways to create your ADS1115_WE object:
+ * ADS1115_WE adc = ADS1115_WE(); -> uses Wire / I2C Address = 0x48
+ * ADS1115_WE adc = ADS1115_WE(I2C_ADDRESS); -> uses Wire / I2C_ADDRESS
+ * ADS1115_WE adc = ADS1115_WE(&Wire); -> you can pass any TwoWire object / I2C Address = 0x48
+ * ADS1115_WE adc = ADS1115_WE(&Wire, I2C_ADDRESS); -> all together
+ */
+ADS1115_WE adc = ADS1115_WE(I2C_ADDRESS);
+
+struct {
+  char Akku[15] = {0};
+  char Solar[15] = {0};
+} ADSData;
+
+void initADS() {
+  Wire.begin();
+  if(!adc.init()){
+    Serial.println("ADS1115 not connected!");
+  }
+
+  /* Set the voltage range of the ADC to adjust the gain
+   * Please note that you must not apply more than VDD + 0.3V to the input pins!
+   * 
+   * ADS1115_RANGE_6144  ->  +/- 6144 mV
+   * ADS1115_RANGE_4096  ->  +/- 4096 mV
+   * ADS1115_RANGE_2048  ->  +/- 2048 mV (default)
+   * ADS1115_RANGE_1024  ->  +/- 1024 mV
+   * ADS1115_RANGE_0512  ->  +/- 512 mV
+   * ADS1115_RANGE_0256  ->  +/- 256 mV
+   */
+  adc.setVoltageRange_mV(ADS1115_RANGE_4096); //comment line/change parameter to change range
+
+  /* Set the inputs to be compared
+   *  
+   *  ADS1115_COMP_0_1    ->  compares 0 with 1 (default)
+   *  ADS1115_COMP_0_3    ->  compares 0 with 3
+   *  ADS1115_COMP_1_3    ->  compares 1 with 3
+   *  ADS1115_COMP_2_3    ->  compares 2 with 3
+   *  ADS1115_COMP_0_GND  ->  compares 0 with GND
+   *  ADS1115_COMP_1_GND  ->  compares 1 with GND
+   *  ADS1115_COMP_2_GND  ->  compares 2 with GND
+   *  ADS1115_COMP_3_GND  ->  compares 3 with GND
+   */
+  //adc.setCompareChannels(ADS1115_COMP_0_GND); //uncomment if you want to change the default
+
+  /* Set number of conversions after which the alert pin will assert
+   * - or you can disable the alert 
+   *  
+   *  ADS1115_ASSERT_AFTER_1  -> after 1 conversion
+   *  ADS1115_ASSERT_AFTER_2  -> after 2 conversions
+   *  ADS1115_ASSERT_AFTER_4  -> after 4 conversions
+   *  ADS1115_DISABLE_ALERT   -> disable comparator / alert pin (default) 
+   */
+  //adc.setAlertPinMode(ADS1115_ASSERT_AFTER_1); //uncomment if you want to change the default
+
+  /* Set the conversion rate in SPS (samples per second)
+   * Options should be self-explaining: 
+   * 
+   *  ADS1115_8_SPS 
+   *  ADS1115_16_SPS  
+   *  ADS1115_32_SPS 
+   *  ADS1115_64_SPS  
+   *  ADS1115_128_SPS (default)
+   *  ADS1115_250_SPS 
+   *  ADS1115_475_SPS 
+   *  ADS1115_860_SPS 
+   */
+  //adc.setConvRate(ADS1115_128_SPS); //uncomment if you want to change the default
+
+  /* Set continuous or single shot mode:
+   * 
+   *  ADS1115_CONTINUOUS  ->  continuous mode
+   *  ADS1115_SINGLE     ->  single shot mode (default)
+   */
+  //adc.setMeasureMode(ADS1115_CONTINUOUS); //uncomment if you want to change the default
+
+   /* Choose maximum limit or maximum and minimum alert limit (window) in volts - alert pin will 
+   *  assert when measured values are beyond the maximum limit or outside the window 
+   *  Upper limit first: setAlertLimit_V(MODE, maximum, minimum)
+   *  In max limit mode the minimum value is the limit where the alert pin assertion will be 
+   *  be cleared (if not latched)  
+   * 
+   *  ADS1115_MAX_LIMIT
+   *  ADS1115_WINDOW
+   * 
+   */
+  //adc.setAlertModeAndLimit_V(ADS1115_MAX_LIMIT, 3.0, 1.5); //uncomment if you want to change the default
+  
+  /* Enable or disable latch. If latch is enabled the alert pin will assert until the
+   * conversion register is read (getResult functions). If disabled the alert pin assertion
+   * will be cleared with next value within limits. 
+   *  
+   *  ADS1115_LATCH_DISABLED (default)
+   *  ADS1115_LATCH_ENABLED
+   */
+  //adc.setAlertLatch(ADS1115_LATCH_ENABLED); //uncomment if you want to change the default
+
+  /* Sets the alert pin polarity if active:
+   *  
+   * ADS1115_ACT_LOW  ->  active low (default)   
+   * ADS1115_ACT_HIGH ->  active high
+   */
+  //adc.setAlertPol(ADS1115_ACT_LOW); //uncomment if you want to change the default
+ 
+  /* With this function the alert pin will assert, when a conversion is ready.
+   * In order to deactivate, use the setAlertLimit_V function  
+   */
+  //adc.setAlertPinToConversionReady(); //uncomment if you want to change the default
+
+}
+
+float readChannel(ADS1115_MUX channel) {
+  float voltage = 0.0;
+  adc.setCompareChannels(channel);
+  adc.startSingleMeasurement();
+  while(adc.isBusy()){}
+  voltage = adc.getResult_V(); // alternative: getResult_mV for Millivolt
+  return voltage;
+}
+
+void MessungADS() {
+  float voltage = 0.0;
+  
+  voltage = readChannel(ADS1115_COMP_0_GND);
+  dtostrf(voltage,8,2,ADSData.Akku);
+  Serial.print("Akku:\t\t\t");
+  Serial.print(ADSData.Akku);
+  Serial.println(" V");
+
+  voltage = readChannel(ADS1115_COMP_1_GND);
+  dtostrf(voltage,8,2,ADSData.Solar);
+  Serial.print("Solar:\t\t\t");
+  Serial.print(ADSData.Solar);
+  Serial.println(" V");
+  
+}
diff --git a/include/mess_BMP280.h b/include/mess_BMP280.h
new file mode 100644
index 0000000..16ec1e4
--- /dev/null
+++ b/include/mess_BMP280.h
@@ -0,0 +1,77 @@
+#include <SPI.h>
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_BMP280.h>
+
+
+#define SEALEVELPRESSURE_HPA (1002.7)  // 1013.25
+// Richen 219 m über NN
+// Eppingem 195 m über NN
+
+Adafruit_BMP280 bmp; // I2C
+
+bool F_BMP280;
+
+struct {
+  char temperature[15] = {0};
+  char pressure[15] = {0};
+  char approx_altitud[15] = {0};
+  char humity[15] = {0};
+} BMP280Data;
+
+  
+
+void Init_BMP280(){
+  bool status = bmp.begin(0x76); 
+  F_BMP280 = true; 
+  if (!status) {
+    Serial.println("Could not find a valid BME280 sensor, check wiring!");
+    F_BMP280 = false;
+  } else{
+    /* Serial.print("SensorID was: 0x"); Serial.println(bmp.sensorID(),16);
+    delay(5000); */
+    /* Default settings from datasheet. */
+    bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */
+                    Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
+                    Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
+                    Adafruit_BMP280::FILTER_X16,      /* Filtering. */
+                    Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
+
+    //bmp_temp->printSensorDetails();
+    Serial.println("BMP280 gefunden");
+  }
+}
+
+void read_BMP_280() {
+
+  
+    Serial.print("Temperature (BMP280):\t");
+    float t = bmp.readTemperature();
+    dtostrf(t,7,1,BMP280Data.temperature);
+    Serial.print(BMP280Data.temperature);
+    Serial.println(" °C");
+
+    Serial.print("Pressure:\t\t");
+    float p = bmp.readPressure() / 100.0F;
+    //p = p + 22;
+    dtostrf(p,5,0,BMP280Data.pressure);
+    Serial.print(BMP280Data.pressure);
+    Serial.println(" hPa");
+
+    Serial.print("Approx. Altitude:\t");
+    float a = bmp.readAltitude(SEALEVELPRESSURE_HPA);
+    dtostrf(a,7,1,BMP280Data.approx_altitud);
+    Serial.print(BMP280Data.approx_altitud);
+    Serial.println(" m über NN");
+
+    Serial.println();
+}
+void M2M_BMP280(String deviceId = "4711") {
+    char topic[100];
+    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/temperature_BMP_280" );
+    client.publish(topic, BMP280Data.temperature, true);
+    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/pressure" );
+    client.publish(topic, BMP280Data.pressure, true);
+    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/approx_altitude" );
+    client.publish(topic, BMP280Data.approx_altitud);
+}
\ No newline at end of file
diff --git a/include/mess_Ub.h b/include/mess_Ub.h
new file mode 100644
index 0000000..fd8b420
--- /dev/null
+++ b/include/mess_Ub.h
@@ -0,0 +1,25 @@
+#include <Arduino.h>
+
+const float MinimalSpannung = 2.85;
+float korectur = 1.02910;
+char floatString[15] = {0};
+float AKKU;
+
+float getBattery(float kor = 1.000)
+{
+  #if (NOBATT == 1)
+    Serial.print("Batterie:\t\t    3.05 V\n");
+    return 3.05;
+  #endif
+  float valA0 = analogRead(A0);
+  valA0 = valA0 * 5.7;	// (R1 + r1 + r2) / r2
+						// R1= Vorwiderstand 100k,
+						// r1 und r2 Spannungsteiler
+						// r1 = 220k, r2 = 100k
+						// Spannungsbereich = 5.2 Volt
+  valA0= valA0 / 1024;
+  valA0 = valA0 * kor;
+  dtostrf(valA0,7,2,floatString);
+  Serial.printf("Batterie:\t\t %s V\n", floatString);
+  return valA0;
+}
\ No newline at end of file
diff --git a/include/mess_htu21.h b/include/mess_htu21.h
new file mode 100644
index 0000000..acae208
--- /dev/null
+++ b/include/mess_htu21.h
@@ -0,0 +1,47 @@
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_I2CDevice.h>
+#include <Adafruit_HTU21DF.h>
+
+Adafruit_HTU21DF htu = Adafruit_HTU21DF();
+
+bool F_HTU_21D;
+
+struct {
+  char temperature[15] = {0};
+  char humity[15] = {0};
+} htuData;
+
+void init_HTU21(){
+    F_HTU_21D = false;
+    if (!htu.begin()) {
+        Serial.println("Couldn't find sensor HUT21D!");
+    
+    }
+    F_HTU_21D = true;
+    Serial.println("HUT21D gefunden");
+}
+
+void read_HTU21D() {
+    float t = htu.readTemperature();
+    dtostrf(t,7,1,htuData.temperature);
+    float h = htu.readHumidity();
+    dtostrf(h,7,1,htuData.humity);
+    Serial.print("Temperature (HTU21D):\t");
+    Serial.print(htuData.temperature);
+    Serial.println(" °C");
+    Serial.print("Luftfeuchtigkeit:\t");
+    Serial.print(htuData.humity);
+    Serial.println(" %");
+
+}
+
+void M2M_HTU21D(String deviceId = "4711") {
+    char topic[100];
+    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/temperature_Htu_21" );
+    client.publish(topic, htuData.temperature, true);
+    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/humity" );
+    client.publish(topic, htuData.humity, true);
+    /* Serial.printf("HTU21:\t\t %s °C\n", htuData.temperature);
+    Serial.printf("HTU21:\t\t %s %%\n", htuData.humity); */
+}
\ No newline at end of file
diff --git a/lib/README b/lib/README
new file mode 100644
index 0000000..8c9c29c
--- /dev/null
+++ b/lib/README
@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..419b648
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,399 @@
+#include <Arduino.h>
+#include <FS.h>                   //this needs to be first, or it all crashes and burns...
+#include <LittleFS.h>
+#include <string>
+#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino
+#include <PubSubClient.h>
+#include <Ticker.h>
+
+#define BUILTIN_LED D15
+#define TRIGGER_PIN    D7 
+#define START_STOP_PIN D6
+
+
+
+void reconnect();
+void setup_wifi();
+void datenSave(int wert);
+int readDaten();
+int saveKorektur(float wert);
+float readKorectur();
+void verifyFingerprint();
+void callback(char* topic1, byte* payload, unsigned int length);
+void pulse_pin(uint8_t pin);
+
+WiFiClientSecure espClient;
+PubSubClient client(espClient);
+
+#include<mess_htu21.h>
+
+#include <mess_BMP280.h>
+
+#include <mess_Ub.h>
+
+#include <messADS1115.h>
+
+#include <mcp9808.h>
+
+
+const char* ssid = STASSID;
+const char* password = STAPSK;
+String hostname = NAME;
+
+const char *MyIP = KMYIP;
+IPAddress ip;
+IPAddress gateway;
+IPAddress subnet(255, 255, 255, 0);
+IPAddress dns; 
+IPAddress secondaryDNS(8, 8, 8, 8);
+
+
+const char* mqtt_fprint = "a3:44:1d:aa:6e:e5:c7:55:02:20:98:ea:9b:df:1a:42:a2:f3:e3:0d";
+const char* mqtt_user =   "mqtt";
+const char* mqtt_pass =   "fische";
+
+const unsigned long interval  = TINTERVAL * 60000000LU; // Minuten * Mikrosekunden für Sleep Mode
+const unsigned long intervalLowBatt = TLOWBATT * 60000000LU; // Minuten * Mikrosekunden für Sleep Mode, Akku entladen
+const unsigned long stoerung  = TERROR * 60000000LU; // Minuten * Mikrosekunden für Sleep Mode
+
+unsigned long previousMillis = 0;
+
+long deviceId;
+char sID[16];
+char clientName[30];
+unsigned long startTime;
+unsigned long endTime;
+char topic[100];
+char topic_1[50];
+char topicWert[20];
+char msg[20];
+int SystemStatus;
+
+
+
+void setup() {
+  pinMode(TRIGGER_PIN, OUTPUT);
+  pinMode(START_STOP_PIN, OUTPUT);
+  digitalWrite(TRIGGER_PIN, HIGH);
+  digitalWrite(START_STOP_PIN, LOW);
+  pulse_pin(TRIGGER_PIN);      // ==> 1
+  Serial.begin(74880);
+  while ( !Serial ) delay(100);   // wait for native usb
+  Serial.println(F("BMP280 Sensor event test"));
+  Serial.println("HTU21D-F test");
+  startTime = millis();
+  WiFi.mode( WIFI_OFF );
+  WiFi.forceSleepBegin();
+  pulse_pin(TRIGGER_PIN);      // ==> 1
+  Serial.println();
+  if (!LittleFS.begin()) {
+    Serial.println("LittleFS mount failed");
+    return;
+  }
+  Dir dir = LittleFS.openDir("/data");
+  while (dir.next()) {
+    Serial.print(dir.fileName());
+    if(dir.fileSize()) {
+        File f = dir.openFile("r");
+        Serial.println(f.size());
+    }
+}
+  Serial.println();
+  Serial.println();
+  Serial.println();
+  //SystemStatus = readDaten();
+  //korectur = readKorectur();
+  //Serial.print("Korektur: "); Serial.println(korectur,6);
+  pinMode(BUILTIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
+  digitalWrite(BUILTIN_LED, LOW);
+  //digitalWrite(BUILTIN_LED, HIGH);
+  //Serial.print("STATUS (Systemmeldung): "); Serial.println(SystemStatus);
+  #if (MQTT == 0)
+  init_HTU21();
+  Init_BMP280();
+  initADS();
+  init_MCP9808();
+  #endif
+  //AKKU = getBattery(korectur);  // ca. 170 ms
+  // ca. 280 ms
+  if (F_HTU_21D == true){
+    read_HTU21D();
+  }
+  read_BMP_280();
+  //MessungADS();
+  setup_wifi();  // ca. 4,5 s
+  // ca. 12ms
+  // ---------------------------------
+  // Status ändern !!! 0
+  datenSave(0);
+  // ---------------------------------
+  //digitalWrite(BUILTIN_LED, HIGH);
+  deviceId = ESP.getChipId();
+  sprintf(sID, "%010ld", deviceId);
+  Serial.print("ID: \t\t"); Serial.println(deviceId);
+  
+  // ca. 5 s
+  espClient.setFingerprint(mqtt_fprint); 
+  client.setServer(mqtt_server, mqtt_port);
+  client.setCallback(callback);
+  //----------
+  
+}
+
+void loop() {
+  unsigned long Pause = 0;
+  if (!client.connected()) {
+    reconnect();
+  }
+  //client.loop();
+  int currentMillis = millis();
+  if (currentMillis - previousMillis >= 10000) {
+    previousMillis = currentMillis;
+    read_HTU21D();
+    read_BMP_280();
+    valTemp = getTemperature_MCP9808();
+    #if(NOADS== 1)
+    MessungADS();
+    sprintf(topic, "%s%s%s", "hjk/devices/", hostname.c_str(), "/telemetry/battery" );
+    client.publish(topic, ADSData.Akku, true);
+    sprintf(topic, "%s%s%s", "hjk/devices/", hostname.c_str(), "/telemetry/solar" );
+    client.publish(topic, ADSData.Solar, true);
+    #endif
+    #if(MQTT == 0)
+    M2M_HTU21D(hostname.c_str());
+    M2M_BMP280(hostname.c_str());
+    M2M_Temperatur_MCP9808(hostname.c_str());
+    #endif
+    #if(NOBATT == 0)
+    AKKU = atof(ADSData.Akku);
+    #else
+    AKKU = 2.95;
+    #endif
+    long int Feldstaerke = WiFi.RSSI();
+    sprintf(msg,"%ld", Feldstaerke);
+    sprintf(topic, "%s%s%s", "hjk/devices/", hostname.c_str(), "/telemetry/RSSI" );
+    client.publish(topic, msg, true);
+    client.loop();
+    delay(500);
+    digitalWrite(BUILTIN_LED, HIGH);
+    /* ESP.deepSleep(5e6);
+    delay(100); */
+    endTime = millis();
+    if (AKKU < MinimalSpannung){
+      // ---------------------------------
+      // Status ändern !!! -5
+      datenSave(-5);
+      // ---------------------------------
+      Pause = intervalLowBatt -((endTime - startTime) * 1000); // Pause ca. 60 Minuten
+      Serial.println("AKKU entladen!");
+    }
+    else{
+      Pause = interval -((endTime - startTime) * 1000);      // Pause ca. 15 Minuten
+    }
+    if(Pause <=0){
+      Pause = 1;
+    }
+    //ESP.restart();
+    Serial.print("Ich gehe für ca. "); Serial.print((Pause/1000/1000/60)+1); Serial.println( " Minuten schlafen.");
+    //ESP.deepSleep(Pause, WAKE_RF_DISABLED); // Pause  
+    digitalWrite(START_STOP_PIN, !LOW);
+    #if (DEBUG == 1)
+    ESP.deepSleep(10e6);
+    #else
+    ESP.deepSleep(Pause);
+    #endif
+    
+    delay(100); 
+  }
+}
+
+void setup_wifi() {
+
+  long ErrCount = 0;
+
+  delay(10);
+  // We start by connecting to a WiFi network
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.print(ssid);
+  Serial.print(" ");
+
+  WiFi.forceSleepWake();
+  delay( 1 );
+  WiFi.persistent( false );
+  WiFi.mode( WIFI_STA );
+  //WiFi.setHostname(hostname.c_str()); //define hostname
+  WiFi.hostname(hostname.c_str());
+  WiFi.mode( WIFI_STA );
+  if (!ip.fromString(MyIP)) { // try to parse into the IPAddress
+    Serial.println("UnParsable IP");
+    }
+  if (!dns.fromString(DNS)) { // try to parse into the IPAddress
+    Serial.println("UnParsable DNS");
+    }
+  if (!gateway.fromString(GATEWAY)) { // try to parse into the IPAddress
+    Serial.println("UnParsable GATEWAY");
+    }
+  //WiFi.config( ip, dns, gateway, subnet );
+  if (!WiFi.config(ip, gateway, subnet, dns, secondaryDNS))
+  {
+    Serial.println("STA Failed to configure");
+  }
+
+  WiFi.begin(ssid, password);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+    ErrCount ++;
+    if (ErrCount >= MaxErrCount){
+      // ---------------------------------
+      // Status ändern !!! -1
+      datenSave(-1);
+      // ---------------------------------
+      endTime = millis();
+      unsigned long Pause = stoerung -((endTime - startTime) * 1000); // Pause
+      Serial.println();
+      Serial.println("STÖRUNG WiFi.");
+      Serial.print("Ich gehe für ca. "); Serial.print(Pause/1000/1000/60); Serial.println( " Minuten schlafen.");
+      ESP.deepSleep(Pause, WAKE_NO_RFCAL); // Pause  
+      delay(100);
+      }
+    }
+  Serial.println(" WiFi connected");
+  Serial.print("IP address: \t");
+  Serial.print(WiFi.localIP()); Serial.print("\tRESSI: "); Serial.println(WiFi.RSSI());
+  /* delay(2000);
+  ESP.deepSleep(2e6, WAKE_RF_DEFAULT);
+  delay(100); */
+} 
+
+void callback(char* topic1, byte* payload, unsigned int length)
+{
+  Serial.print("Message arrived [");
+  Serial.print(topic1);
+  Serial.print("] ");
+  for (unsigned int i = 0; i < length; i++) {
+    msg[i] = (char)payload[i];
+  }
+  msg[length] = '\0';
+  Serial.println(msg);
+  if(strcmp(topic1, topic_1)== 0){
+    Serial.print(msg);
+    Serial.println();
+    korectur = atof(msg);
+    Serial.print("Korektur:\t");Serial.println(korectur, 8);
+    int er = saveKorektur(korectur);
+    if (er != 0){
+      Serial.println("Daten konnten nicht gespeichert werden.");
+    }
+    float test = readKorectur();
+    Serial.print("Korektur:\t");Serial.println(test, 8);
+  }
+}
+
+void reconnect() {
+  // Loop until we're reconnected
+  sprintf(clientName, "%s%s", "ESP8266Client", sID);
+  while (!client.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    verifyFingerprint();
+    // Attempt to connect
+    if (client.connect(clientName)) {
+      Serial.println("connected");
+      // Once connected, publish an announcement...
+      client.publish("outTopic", "hello world");
+      // ... and resubscribe
+      client.subscribe("inTopic");
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 5 seconds before retrying
+      delay(5000);
+      ESP.restart();
+    }
+  }
+}
+
+void datenSave(int wert){
+  File k = LittleFS.open("/status.txt", "w");
+  if(!k){
+    Serial.println("file open failed");
+  }
+  k.println(wert);
+  k.close();
+}
+
+int readDaten()
+{
+  int Error;
+  File k = LittleFS.open("/status.txt", "r");
+  if(!k){
+    Serial.println("file open failed");
+    Error = -10;
+  }else{
+    String data = k.readString();
+    Error = data.toInt();  
+    k.close();
+  }
+  return Error;
+}
+
+int saveKorektur(float wert){
+  int Error = 0;
+  File k = LittleFS.open("/Korektur.txt", "w");
+  if(!k){
+    Serial.println("file open failed");
+    Error = -1;
+  }else{
+    k.println(String(wert,8));
+    k.close();
+  }
+  return Error;
+}
+
+float readKorectur(){
+  float Korektur;
+  File k = LittleFS.open("/Korektur.txt", "r");
+  if(!k){
+    Serial.println("file open failed");
+    Korektur = 1.00;
+  }else{
+    String data = k.readString();
+    Korektur = data.toFloat();  
+    k.close();
+  }
+  return Korektur;
+}
+
+void verifyFingerprint() {
+  unsigned long Pause = 0;
+  if(client.connected() || espClient.connected()) return; //Already connected
+  
+  Serial.print("\n\tChecking TLS @ ");
+  Serial.print(mqtt_server);
+  Serial.print("...");
+  
+  if (!espClient.connect(mqtt_server, mqtt_port)) {
+    //Serial.println("\n\tConnection failed. Rebooting.");
+    Serial.println("\n\tConnection failed.");
+    Serial.flush();
+    //blink.detach();
+    //blink.attach(0.05, flip);
+    //delay(5000);
+    endTime = millis();
+    Pause = stoerung -((endTime - startTime) * 1000);      // Pause ca. 15 Minuten
+    Serial.print("\tIch gehe für "); Serial.print((Pause/1000/1000/60)+1); Serial.println( " Minuten schlafen.");
+    ESP.deepSleep(Pause, WAKE_RF_DISABLED); // Pause  
+    delay(500);   
+  }
+  espClient.stop();
+  delay(100);
+}
+void pulse_pin(uint8_t pin)
+{
+  digitalWrite(pin, LOW);
+  delay(1);
+  digitalWrite(pin, HIGH);	
+}
diff --git a/test/README b/test/README
new file mode 100644
index 0000000..b0416ad
--- /dev/null
+++ b/test/README
@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html
diff --git a/workspace.code-workspace b/workspace.code-workspace
new file mode 100644
index 0000000..3e70edd
--- /dev/null
+++ b/workspace.code-workspace
@@ -0,0 +1,4 @@
+{
+	"folders": [],
+	"settings": {}
+}
\ No newline at end of file