diff --git a/libraries/Max44009/Max44009.h b/libraries/Max44009/Max44009.h
index 76d8bb74..8526abe8 100644
--- a/libraries/Max44009/Max44009.h
+++ b/libraries/Max44009/Max44009.h
@@ -3,7 +3,7 @@
 //
 //    FILE: Max44009.h
 //  AUTHOR: Rob dot Tillaart at gmail dot com
-// VERSION: 0.1.10
+// VERSION: 0.2.0
 // PURPOSE: library for MAX44009 lux sensor Arduino
 // HISTORY: See Max440099.cpp
 //
@@ -18,7 +18,7 @@
 #include "WProgram.h"
 #endif
 
-#define MAX44009_LIB_VERSION "0.1.10"
+#define MAX44009_LIB_VERSION "0.2.0"
 
 // REGISTERS
 #define MAX44009_INTERRUPT_STATUS   0x00
@@ -40,9 +40,13 @@
 class Max44009
 {
 public:
+
+#if defined(ESP8266) || defined(ESP32)
     // dataPin and clockPin can be used for ESP8266
-    // for UNO ignore these (and its warning)
-    Max44009(const uint8_t address, const uint8_t dataPin = 255, const uint8_t clockPin = 255);
+    Max44009(const uint8_t address, const uint8_t dataPin, const uint8_t clockPin);
+#endif
+    // ctor for UNO
+    Max44009(const uint8_t address);
 
     float   getLux();
     int     getError();
diff --git a/libraries/Max44009/examples/max44009_test01/max44009_test01.ino b/libraries/Max44009/examples/max44009_test01/max44009_test01.ino
index ecdc808a..75cbcbd7 100644
--- a/libraries/Max44009/examples/max44009_test01/max44009_test01.ino
+++ b/libraries/Max44009/examples/max44009_test01/max44009_test01.ino
@@ -1,10 +1,9 @@
 //
 //    FILE: max44009_test01.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
+// VERSION: 0.1.2
 // PURPOSE: demo of max44009 library
 //    DATE: 2015-08-06
-//     URL: ?
 //
 // Released to the public domain
 //
@@ -12,7 +11,7 @@
 #include "Wire.h"
 #include "Max44009.h"
 
-Max44009 myLux(0xCB);  // default addr
+Max44009 myLux(0xCB);         // default addr
 
 uint32_t lastDisplay = 0;
 
@@ -21,6 +20,9 @@ void setup()
   Serial.begin(115200);
   Serial.print("Start max44009_test01 : ");
   Serial.println(MAX44009_LIB_VERSION);
+
+  Wire.begin();
+
 }
 
 void loop()
@@ -44,4 +46,4 @@ void loop()
 
 }
 
-
+// END OF FILE
diff --git a/libraries/Max44009/library.json b/libraries/Max44009/library.json
index 2cb12c1e..06e58fc9 100644
--- a/libraries/Max44009/library.json
+++ b/libraries/Max44009/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/Arduino.git"
   },
-  "version":"0.1.10",
+  "version":"0.2.0",
   "frameworks": "arduino",
   "platforms": "*",
   "export": {
diff --git a/libraries/Max44009/library.properties b/libraries/Max44009/library.properties
index f9a70193..7ee0d687 100644
--- a/libraries/Max44009/library.properties
+++ b/libraries/Max44009/library.properties
@@ -1,5 +1,5 @@
 name=Max44009
-version=0.1.10
+version=0.2.0
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Library for MAX44009 lux sensor Arduino. 
diff --git a/libraries/Max44009/max44009.cpp b/libraries/Max44009/max44009.cpp
index c98f5c09..b546a83a 100644
--- a/libraries/Max44009/max44009.cpp
+++ b/libraries/Max44009/max44009.cpp
@@ -1,12 +1,13 @@
 //
 //    FILE: Max44009.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.10
+// VERSION: 0.2.0
 // PURPOSE: library for MAX44009 lux sensor Arduino
 //     URL: https://github.com/RobTillaart/Arduino/tree/master/libraries
 //
 // Released to the public domain
 //
+// 0.2.0  - 2019-08-23 solve #127 == redo #118
 // 0.1.10 - 2018-12-08 issue #118 Fix constructor esp8266
 //          (thanks to Bolukan)
 // 0.1.9  - 2018-07-01 issue #108 Fix shift math
@@ -24,10 +25,13 @@
 
 #include "Max44009.h"
 
-
+#if defined(ESP8266) || defined(ESP32)
 Max44009::Max44009(const uint8_t address, const uint8_t dataPin, const uint8_t clockPin)
 {
     _address = address;
+    _data = 0;
+    _error = 0;
+
     if ((dataPin < 255) && (clockPin < 255))
     {
         Wire.begin(dataPin, clockPin);
@@ -35,8 +39,17 @@ Max44009::Max44009(const uint8_t address, const uint8_t dataPin, const uint8_t c
         Wire.begin();
     }
     // TWBR = 12; // Wire.setClock(400000);
+}
+#endif
+
+Max44009::Max44009(const uint8_t address)
+{
+    _address = address;
     _data = 0;
     _error = 0;
+
+    Wire.begin();
+    // TWBR = 12; // Wire.setClock(400000);
 }
 
 float Max44009::getLux(void)
@@ -132,7 +145,7 @@ void Max44009::setManualMode(uint8_t CDR, uint8_t TIM)
 void Max44009::setThreshold(const uint8_t reg, const float value)
 {
     // TODO CHECK RANGE
-    uint32_t m = round(value / 0.045);  // mulitply * 22.22222222 is faster.
+    uint32_t m = round(value * 22.2222222);     // was round(value / 0.045);  mulitply is faster.
     uint8_t e = 0;
     while (m > 255)
     {