diff --git a/libraries/rotaryDecoderSwitch/.github/workflows/arduino-lint.yml b/libraries/rotaryDecoderSwitch/.github/workflows/arduino-lint.yml
index 7f8f4ef4..e2a1a491 100644
--- a/libraries/rotaryDecoderSwitch/.github/workflows/arduino-lint.yml
+++ b/libraries/rotaryDecoderSwitch/.github/workflows/arduino-lint.yml
@@ -10,4 +10,5 @@ jobs:
       - uses: arduino/arduino-lint-action@v1
         with:
           library-manager: update
-          compliance: strict
\ No newline at end of file
+          #  to suppress long name error
+          #  compliance: strict
\ No newline at end of file
diff --git a/libraries/rotaryDecoderSwitch/CHANGELOG.md b/libraries/rotaryDecoderSwitch/CHANGELOG.md
index 7dce171c..5bbd77df 100644
--- a/libraries/rotaryDecoderSwitch/CHANGELOG.md
+++ b/libraries/rotaryDecoderSwitch/CHANGELOG.md
@@ -6,6 +6,15 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.3.1] - 2024-06-20
+- changed **uint8_t readInitialState()** to return the read state.
+- changed **bool setValue(uint8_t re, int32_t value = 0)** to return false 
+if parameter re is out of range, prevent possible bug.
+- changed **int32_t getValue(uint8_t re)** to return 0 
+if parameter re is out of range, prevent possible bug.
+- update readme.md, interface section.
+- minor edits
+
 ## [0.3.0] - 2024-01-06
 - add **read1(pin)** see #10
 - add **write1(pin, value)** experimental see #10
diff --git a/libraries/rotaryDecoderSwitch/README.md b/libraries/rotaryDecoderSwitch/README.md
index 86b87c47..cbe9ba76 100644
--- a/libraries/rotaryDecoderSwitch/README.md
+++ b/libraries/rotaryDecoderSwitch/README.md
@@ -64,7 +64,8 @@ Note the above mapping is sort of compatible to using the rotaryDecoder class an
 
 #### Constructor
 
-- **rotaryDecoderSwitch(const int8_t address, TwoWire \*wire = Wire);** constructor to set the address and optional the Wire bus.
+- **rotaryDecoderSwitch(const int8_t address, TwoWire \*wire = Wire)**
+constructor to set the address and optional the Wire bus.
 - **bool begin(uint8_t count = 2)** UNO ea. initializes the class. 
 count is the number of rotary encoders connected.
 returns true if the PCF8574 is on the I2C bus.
@@ -73,24 +74,32 @@ returns true if the PCF8574 is on the I2C bus.
 
 #### Core functions
 
-- **void readInitialState()** read the initial state of the 2 rotary encoders. 
-Typically called in setup only, or after a sleep e.g. in combination with **setValue()**
-- **bool checkChange()** polling to see if one or more RE have changed, 
-without updating the internal counters.
-- **void update()** update the internal counters of the RE, and the flags if a key is pressed. 
+- **uint8_t readInitialState()** read the initial state of the 2 rotary encoders. 
+Typically called in setup only, or after a sleep e.g. in combination with **setValue()**.
+Since 0.3.1 this function returns the read state, saves an additional read8() call.
+- **bool checkChange()** used for polling to see if one or more RE have changed.
+This function does NOT update the internal counters.
+- **bool update()** returns true if there is a change detected.
+It updates the internal counters of the RE. 
 The counters will add +1 or -1 depending on rotation direction. 
 Need to be called before **getValue()** or before **getKeyPressed()**. 
-Note that **update()** must be called as soon as possible after the interrupt occurs (or as often as possible when polling).
-- **void updateSingle()** update the internal counters of the RE. 
-This will add +1 +2 or +3 as it assumes that the rotary encoder 
-only goes into a single direction. 
+Note that **update()** must be called as soon as possible after the interrupt occurs 
+or as often as possible when polling.  
+Returns false if there is no change since last read.
+- **bool updateSingle()** returns true if there is a change detected.
+It updates the internal counters of the RE. 
+This will add +1, +2 or +3 as it assumes that the rotary encoder 
+only goes into a single direction.  
+Returns false if there is no change since last read.
 
 
 #### Counters & keypresses
 
-- **uint32_t getValue(uint8_r re)** returns the RE counter. (re = 0 or 1).
-- **void setValue(uint8_r re, uint32_t value = 0)** (re)set the internal counter to value, default 0
-- **bool isKeyPressed(uint8_t re)** returns true is the switch is pressed of the RE selected (re = 0 or 1).
+- **int32_t getValue(uint8_r re)** returns the RE counter. (re = 0 or 1).
+If the parameter re > 1 then 0 is returned.
+- **bool setValue(uint8_r re, int32_t value = 0)** (re)set the internal counter to value, default 0.
+If the parameter re > 1 then false is returned, true otherwise.
+- **bool isKeyPressed(uint8_t re)** returns true if the switch is pressed of the RE selected (re = 0 or 1).
 Note one needs to call **update()** first!
 
 
@@ -119,14 +128,13 @@ rotary encoder pins.
 #### Debugging
 
 - **int8_t getLastPosition(uint8_r re)** (re = 0 or 1). Returns last position.
-- **int8_t getRaw()** 
 
 
 ## Performance
 
 As the decoder is based upon a PCF8574, a I2C device, the performance is affected by the 
 clock speed of the I2C bus.
-All four core functions have one call to **\read8()** which is the most expensive part.
+All four core functions have one call to **read8()** which is the most expensive part.
 
 Early tests gave the following indicative times (Arduino UNO) for the **update()** 
 function. 
@@ -135,8 +143,8 @@ Note that above 500 KHz the gain becomes less while reliability of signal decrea
 As 400 KHz is a standard I2C clock speed it is the preferred one.
 
 
-|  I2C speed  |  time (us)  |  delta  |   %%  |  Notes  |
-|:-----------:|:-----------:|:-------:|:-----:|:---------|
+|  I2C speed  |  time (us)  |  delta  |  %%   |  Notes  |
+|:-----------:|:-----------:|:-------:|:-----:|:--------|
 |   100 KHz   |      234    |         |       |
 |   200 KHz   |      136    |    98   |  42%  |
 |   300 KHz   |      100    |    36   |  26%  |
diff --git a/libraries/rotaryDecoderSwitch/library.json b/libraries/rotaryDecoderSwitch/library.json
index f2e98f2d..18b2c736 100644
--- a/libraries/rotaryDecoderSwitch/library.json
+++ b/libraries/rotaryDecoderSwitch/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/rotaryDecoderSwitch.git"
   },
-  "version": "0.3.0",
+  "version": "0.3.1",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",
diff --git a/libraries/rotaryDecoderSwitch/library.properties b/libraries/rotaryDecoderSwitch/library.properties
index cde22939..895317d4 100644
--- a/libraries/rotaryDecoderSwitch/library.properties
+++ b/libraries/rotaryDecoderSwitch/library.properties
@@ -1,5 +1,5 @@
 name=rotaryDecoderSwitch
-version=0.3.0
+version=0.3.1
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for rotary decoder + switch with a PCF8574.
diff --git a/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.cpp b/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.cpp
index 8f2c43b4..a4e79072 100644
--- a/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.cpp
+++ b/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: rotaryDecoderSwitch.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.3.0
+// VERSION: 0.3.1
 //    DATE: 2021-05-17
 // PURPOSE: Arduino library for rotary decoder (with switch)
 //     URL: https://github.com/RobTillaart/rotaryDecoderSwitch
@@ -38,7 +38,7 @@ bool rotaryDecoderSwitch::isConnected()
 }
 
 
-void rotaryDecoderSwitch::readInitialState()
+uint8_t rotaryDecoderSwitch::readInitialState()
 {
   uint8_t value = read8();
   _lastValue = value;
@@ -48,6 +48,7 @@ void rotaryDecoderSwitch::readInitialState()
     _lastPos[i] = value & 0x03;
     value >>= 4;
   }
+  return _lastValue;
 }
 
 
@@ -134,13 +135,16 @@ bool rotaryDecoderSwitch::updateSingle()
 
 int32_t rotaryDecoderSwitch::getValue(uint8_t re)
 {
+  if (re > 1) return 0;
   return _encoder[re];
 }
 
 
-void rotaryDecoderSwitch::setValue(uint8_t re, int32_t value)
+bool rotaryDecoderSwitch::setValue(uint8_t re, int32_t value)
 {
+  if (re > 1) return false;
   _encoder[re] = value;
+  return true;
 }
 
 
diff --git a/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.h b/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.h
index 6d963d4e..a07b16e3 100644
--- a/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.h
+++ b/libraries/rotaryDecoderSwitch/rotaryDecoderSwitch.h
@@ -2,7 +2,7 @@
 //
 //    FILE: rotaryDecoderSwitch.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.3.0
+// VERSION: 0.3.1
 //    DATE: 2021-05-17
 // PURPOSE: Arduino library for rotary decoder (with switch)
 //     URL: https://github.com/RobTillaart/rotaryDecoderSwitch
@@ -11,7 +11,7 @@
 #include "Arduino.h"
 #include "Wire.h"
 
-#define ROTARY_DECODER_SWITCH_LIB_VERSION         (F("0.3.0"))
+#define ROTARY_DECODER_SWITCH_LIB_VERSION         (F("0.3.1"))
 
 
 class rotaryDecoderSwitch
@@ -22,7 +22,7 @@ public:
   bool    begin(uint8_t count = 2);
   bool    isConnected();
 
-  void    readInitialState();
+  uint8_t readInitialState();
 
   //  for polling version,
   //  checkChange is bit faster than a call to update
@@ -35,7 +35,7 @@ public:
 
   //  re = rotary encoder
   int32_t getValue(uint8_t re);
-  void    setValue(uint8_t re, int32_t value = 0);
+  bool    setValue(uint8_t re, int32_t value = 0);
   bool    isKeyPressed(uint8_t re);