diff --git a/src/IBusBM.cpp b/src/IBusBM.cpp
index 624c11a..bd5f378 100644
--- a/src/IBusBM.cpp
+++ b/src/IBusBM.cpp
@@ -90,7 +90,7 @@ void IBusBM::begin(HardwareSerial &serial, int8_t timerid, int8_t rxPin, int8_t
   #ifdef ARDUINO_ARCH_ESP32
     serial.begin(115200, SERIAL_8N1, rxPin, txPin);
   #else
-    serial.begin(115200, SERIAL_8N1);
+    serial.begin(115200);
   #endif
 
   this->stream = &serial;
diff --git a/src/IBusBM.h b/src/IBusBM.h
index 9287d43..e7dc034 100644
--- a/src/IBusBM.h
+++ b/src/IBusBM.h
@@ -90,7 +90,7 @@ class IBusBM {
   } sensorinfo;
   sensorinfo sensors[SENSORMAX];
   uint8_t NumberSensors = 0;        // number of sensors
-  IBusBM* IBusBMnext = NULL;        // pointer to the next class instance to be used to call the loop() method from timer interrupt
+  IBusBM* IBusBMnext = nullptr;        // pointer to the next class instance to be used to call the loop() method from timer interrupt
 };
 
 #endif