diff --git a/include/sensor_bh1750.cpp b/include/sensor_bh1750.cpp
index 0dcf04b..372d5d7 100644
--- a/include/sensor_bh1750.cpp
+++ b/include/sensor_bh1750.cpp
@@ -5,7 +5,7 @@
 
 Sensor_BH1750::Sensor_BH1750()
 {
-  BH1750 bh1750(0x23); //0x23 if addr connected to ground (=pin open), 0x5c if addr pulled high
+  bh1750 = new BH1750(0x23); //0x23 if addr connected to ground (=pin open), 0x5c if addr pulled high
 }
 
 void Sensor_BH1750::init() //Things to be done during setup()
diff --git a/include/sensor_bmp180.cpp b/include/sensor_bmp180.cpp
index 678362e..7633cef 100644
--- a/include/sensor_bmp180.cpp
+++ b/include/sensor_bmp180.cpp
@@ -5,7 +5,7 @@
 
 Sensor_BMP180::Sensor_BMP180()
 {
-    Adafruit_BMP085 bmp180;
+    bmp180 = new Adafruit_BMP085();
 }
 
 void Sensor_BMP180::init() //Things to be done during setup()
diff --git a/include/sensor_htu21d.cpp b/include/sensor_htu21d.cpp
index 8d03d73..253a5f8 100644
--- a/include/sensor_htu21d.cpp
+++ b/include/sensor_htu21d.cpp
@@ -6,7 +6,7 @@
 
 Sensor_HTU21D::Sensor_HTU21D()
 {
-    Adafruit_HTU21DF htu;
+    htu = new Adafruit_HTU21DF();
 }
 
 void Sensor_HTU21D::init() //Things to be done during setup()
diff --git a/include/sensor_mhz19b.cpp b/include/sensor_mhz19b.cpp
index 73abccc..ecc3812 100644
--- a/include/sensor_mhz19b.cpp
+++ b/include/sensor_mhz19b.cpp
@@ -7,6 +7,9 @@ Sensor_MHZ19B::Sensor_MHZ19B(int prx,int ptx)
   pin_rx=prx;
   pin_tx=ptx;
 
+  mhz19 = new MHZ19();
+  mhz19_swSerial = new SoftwareSerial();
+
   /*
   * MHZ19 Library: https://platformio.org/lib/show/1620/SevSegSPI
   * Software Serial Library: https://platformio.org/lib/show/168/EspSoftwareSerial
diff --git a/include/sensor_mhz19b.h b/include/sensor_mhz19b.h
index ea89a2a..cd40fff 100644
--- a/include/sensor_mhz19b.h
+++ b/include/sensor_mhz19b.h
@@ -25,7 +25,6 @@ private:
     int mhz19_readValue_reimplemented(Stream *_streamRef, MHZ19 *_mhz19Ref);
     byte mhz19_getCheckSum(byte* packet);
     
-
     bool mhz19_ready;
 
     MHZ19 *mhz19;
diff --git a/include/sensor_sds018.cpp b/include/sensor_sds018.cpp
index a21fe60..740e390 100644
--- a/include/sensor_sds018.cpp
+++ b/include/sensor_sds018.cpp
@@ -10,6 +10,8 @@ Sensor_SDS018::Sensor_SDS018(int prx,int ptx)
 {
   pin_rx=prx;
   pin_tx=ptx;
+
+  sds018_swSerial = new SoftwareSerial();
 }
 
 void Sensor_SDS018::init() //Things to be done during setup()