diff --git a/README.md b/README.md
index dc89ff9..7328f88 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,11 @@ Supports sensors features:
 
 The Sensor uses I2C for communication's. Data is outputted (eg to a PC) via a USB.
 Can be set up for any I2C interface and speed. By default I2C0, GPIO16(SDATA) and GPIO17(SCLK) & 100kHz.
+If you want to use the other I2C port (I2C1) in addition to changing in the main.ccp,
+The user must change it in library header as well, could not find a way around this.
+
+* i2c_inst_t *i2c = i2c0 to i2c_inst_t *i2c = i2c1
+
 
 **Files**
 
diff --git a/include/ahtxx/ahtxx.hpp b/include/ahtxx/ahtxx.hpp
index 4862748..0439e8d 100644
--- a/include/ahtxx/ahtxx.hpp
+++ b/include/ahtxx/ahtxx.hpp
@@ -57,6 +57,7 @@ class LIB_AHTXX
     ASAIR_I2C_SENSOR_e _sensorName;
     uint8_t  _rawDataBuffer[6] = {AHT10_ERROR, 0, 0, 0, 0, 0};
     int16_t  returnValue = 0;
+    bool isConnected = false;
 
 public:
     // Constructor
@@ -76,6 +77,9 @@ class LIB_AHTXX
     uint8_t  AHT10_getCalibrationBit(bool);
     bool     AHT10_enableFactoryCalCoeff();
     uint8_t  AHT10_getBusyBit(bool);
+
+    void AHT10_SetIsConnected(bool);
+    bool AHT10_GetIsConnected(void);
 };
 #endif
 
diff --git a/src/ahtxx/ahtxx.cpp b/src/ahtxx/ahtxx.cpp
index 858f1b5..a3a47de 100644
--- a/src/ahtxx/ahtxx.cpp
+++ b/src/ahtxx/ahtxx.cpp
@@ -42,7 +42,11 @@ bool LIB_AHTXX::AHT10_begin()
 {
 	busy_wait_ms(AHT10_POWER_ON_DELAY);    //wait for sensor to initialize
 	AHT10_setNormalMode();                //one measurement+sleep mode
-	return AHT10_enableFactoryCalCoeff(); //load factory calibration coeff
+	if (AHT10_enableFactoryCalCoeff()) //load factory calibration coeff
+		isConnected = true;
+	else 
+		isConnected = false;
+	return isConnected; 
 }
 
 
@@ -289,3 +293,13 @@ void LIB_AHTXX::AHT10_DeInit(i2c_inst_t* i2c_type)
 	i2c_inst_t *i2c = i2c_type;
 	i2c_deinit(i2c); 	
 }
+
+void LIB_AHTXX::AHT10_SetIsConnected(bool connected)
+{
+	isConnected = connected;
+}
+
+bool LIB_AHTXX::AHT10_GetIsConnected(void)
+{
+	return isConnected;
+}
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