diff --git a/client/client/.gitignore b/client/client/.gitignore
index 6dea8206d255251b692bc51b06adced35f789ce8..89cc49cbd652508924b868ea609fa8f6b758ec56 100644
--- a/client/client/.gitignore
+++ b/client/client/.gitignore
@@ -3,4 +3,3 @@
 .vscode/c_cpp_properties.json
 .vscode/launch.json
 .vscode/ipch
-!lib/
diff --git a/client/client/.gitkeep b/client/client/.gitkeep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/client/client/lib/scd30/scd30.cpp b/client/client/lib/scd30/scd30.cpp
index 326de8862480cb74cc09210b138a8ed5a337d45f..5a27e2430d4265423f97e9185c17be9b3b546719 100644
--- a/client/client/lib/scd30/scd30.cpp
+++ b/client/client/lib/scd30/scd30.cpp
@@ -11,9 +11,16 @@ void Forte_SCD30 :: setup(){
 }
 
 float* Forte_SCD30 :: read_data(){
-    float data[3];
-    data[0] = airSensor.getCO2();
-    data[1] = airSensor.getTemperature();
-    data[2] = airSensor.getHumidity();
-    return data;
+ 
+
+ if(airSensor.dataAvailable()==true)
+    {
+        data[0] = airSensor.getCO2();
+        data[1] = airSensor.getTemperature();
+        data[2] = airSensor.getHumidity();
+        return data;
+    }
+else 
+        return 0;
+
 }
\ No newline at end of file
diff --git a/client/client/lib/scd30/scd30.hpp b/client/client/lib/scd30/scd30.hpp
index 396e311642f0e83f881728c2685c879b08d1edae..cdcf377a708331a782b698d4ba46cca1ae9cfaa8 100644
--- a/client/client/lib/scd30/scd30.hpp
+++ b/client/client/lib/scd30/scd30.hpp
@@ -4,6 +4,7 @@
 #include <pinout.hpp>
 #include <SparkFun_SCD30_Arduino_Library.h>
 
+
 class Forte_SCD30 : public Forte_Sensor{
     public:
         void setup();
@@ -11,6 +12,7 @@ class Forte_SCD30 : public Forte_Sensor{
 
     private:
         SCD30 airSensor;
+        float data[3];
 };
 
 #endif
\ No newline at end of file
diff --git a/client/client/src/main.cpp b/client/client/src/main.cpp
index 58b344c5757478d990bb23dd41243135880fb2f5..44261287de1f27aef893417b752825e1bfd8c48a 100644
--- a/client/client/src/main.cpp
+++ b/client/client/src/main.cpp
@@ -1,9 +1,31 @@
 #include <Arduino.h>
+#include <scd30.hpp>
+
+Forte_SCD30 sensor1;  //without adding frte_sensor +  to the local lib/scd30 i error appears
 
 void setup() {
   // put your setup code here, to run once:
+  Serial.begin(9600);
+  sensor1.setup();
+
 }
 
 void loop() {
   // put your main code here, to run repeatedly:
+
+  float* data;
+
+  data=sensor1.read_data();
+  if(data!=0)
+  {
+    Serial.println("C02"); Serial.println(data[0]); 
+    Serial.println("Temperatur");  Serial.println(data[1]);
+    Serial.println("Humidity"); Serial.println(data[2]);
+    Serial.println();
+  }
+  else
+    Serial.println("waiting for data");
+
+  delay(3000);
+
 }
\ No newline at end of file