diff --git a/libraries/LTC2991/CHANGELOG.md b/libraries/LTC2991/CHANGELOG.md
index 3ad3bb58..a121e568 100644
--- a/libraries/LTC2991/CHANGELOG.md
+++ b/libraries/LTC2991/CHANGELOG.md
@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.2.1] - 2024-01-03
+- fix examples
+- minor edits
+
+
 ## [0.2.0] - 2023-12-04
 - refactor API, remove ESP32 specific code
 - update readme.md
diff --git a/libraries/LTC2991/LICENSE b/libraries/LTC2991/LICENSE
index 088bbaf1..3afaaeda 100644
--- a/libraries/LTC2991/LICENSE
+++ b/libraries/LTC2991/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021-2023 Rob Tillaart
+Copyright (c) 2021-2024 Rob Tillaart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/libraries/LTC2991/LTC2991.cpp b/libraries/LTC2991/LTC2991.cpp
index 4fd271b7..01862bc0 100644
--- a/libraries/LTC2991/LTC2991.cpp
+++ b/libraries/LTC2991/LTC2991.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: LTC2991.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.0
+// VERSION: 0.2.1
 //    DATE: 2021-05-10
 // PURPOSE: Library for LTC2991 temperature and voltage control IC
 //     URL: https://github.com/RobTillaart/LTC2991
diff --git a/libraries/LTC2991/LTC2991.h b/libraries/LTC2991/LTC2991.h
index d1cfb700..1ca74ad6 100644
--- a/libraries/LTC2991/LTC2991.h
+++ b/libraries/LTC2991/LTC2991.h
@@ -2,7 +2,7 @@
 //
 //    FILE: LTC2991.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.0
+// VERSION: 0.2.1
 //    DATE: 2021-05-10
 // PURPOSE: Library for LTC2991 temperature and voltage control IC
 //     URL: https://github.com/RobTillaart/LTC2991
@@ -12,10 +12,10 @@
 #include "Wire.h"
 
 
-#define LTC2991_LIB_VERSION               (F("0.2.0"))
+#define LTC2991_LIB_VERSION               (F("0.2.1"))
 
 //
-// DEFINES for readability
+//  DEFINES for readability
 //
 #define LTC2991_NEW_DATA                  0x01
 #define LTC2991_NO_DATA                   0x00
@@ -56,7 +56,7 @@ class LTC2991
 public:
   explicit LTC2991(const uint8_t address, TwoWire *wire = &Wire);
 
-    bool    begin();
+  bool    begin();
   bool    isConnected();
   uint8_t getAddress();
 
diff --git a/libraries/LTC2991/examples/LTC2991_PWM/LTC2991_PWM.ino b/libraries/LTC2991/examples/LTC2991_PWM/LTC2991_PWM.ino
index b4ee8a75..1599a070 100644
--- a/libraries/LTC2991/examples/LTC2991_PWM/LTC2991_PWM.ino
+++ b/libraries/LTC2991/examples/LTC2991_PWM/LTC2991_PWM.ino
@@ -1,7 +1,8 @@
 //
 //    FILE: LTC2991_PWM.ino
 //  AUTHOR: Rob Tillaart
-// PUPROSE: demo
+// PURPOSE: demo
+//     URL: https://github.com/RobTillaart/LTC2991
 
 
 #include "Wire.h"
@@ -19,8 +20,9 @@ void setup()
 {
   Serial.begin(115200);
   Serial.println(__FILE__);
-  Serial.print("LTC2991_LIB_VERSION:\t");
+  Serial.print("LTC2991_LIB_VERSION: ");
   Serial.println(LTC2991_LIB_VERSION);
+  Serial.println();
 
   Wire.begin();
   Wire.setClock(100000);
diff --git a/libraries/LTC2991/examples/LTC2991_demo/LTC2991_demo.ino b/libraries/LTC2991/examples/LTC2991_demo/LTC2991_demo.ino
index 8a76fe5a..05240e32 100644
--- a/libraries/LTC2991/examples/LTC2991_demo/LTC2991_demo.ino
+++ b/libraries/LTC2991/examples/LTC2991_demo/LTC2991_demo.ino
@@ -1,7 +1,8 @@
 //
 //    FILE: LTC2991_demo.ino
 //  AUTHOR: Rob Tillaart
-// PUPROSE: detect device on I2C bus
+// PURPOSE: detect device on I2C bus
+//     URL: https://github.com/RobTillaart/LTC2991
 
 
 #include "Wire.h"
@@ -14,13 +15,13 @@ void setup()
 {
   Serial.begin(115200);
   Serial.println(__FILE__);
-  Serial.print("LTC2991_LIB_VERSION:\t");
+  Serial.print("LTC2991_LIB_VERSION: ");
   Serial.println(LTC2991_LIB_VERSION);
+  Serial.println();
 
   Wire.begin();
   Wire.setClock(100000);
   LTC.begin();
-
 }
 
 
@@ -35,7 +36,7 @@ void loop()
   Serial.print(millis());
   Serial.print("\taddress: ");
   Serial.println(LTC.getAddress());
-  
+
   delay(2000);
 }
 
diff --git a/libraries/LTC2991/examples/LTC2991_internal_temp_volt/LTC2991_internal_temp_volt.ino b/libraries/LTC2991/examples/LTC2991_internal_temp_volt/LTC2991_internal_temp_volt.ino
index e0f21711..2456f980 100644
--- a/libraries/LTC2991/examples/LTC2991_internal_temp_volt/LTC2991_internal_temp_volt.ino
+++ b/libraries/LTC2991/examples/LTC2991_internal_temp_volt/LTC2991_internal_temp_volt.ino
@@ -1,7 +1,8 @@
 //
 //    FILE: LTC2991_internal_temp_volt.ino
 //  AUTHOR: Rob Tillaart
-// PUPROSE: demo monitoring Tinternal and VCC
+// PURPOSE: demo monitoring Tinternal and VCC
+//     URL: https://github.com/RobTillaart/LTC2991
 
 
 #include "Wire.h"
@@ -14,8 +15,9 @@ void setup()
 {
   Serial.begin(115200);
   Serial.println(__FILE__);
-  Serial.print("LTC2991_LIB_VERSION:\t");
+  Serial.print("LTC2991_LIB_VERSION: ");
   Serial.println(LTC2991_LIB_VERSION);
+  Serial.println();
 
   Wire.begin();
   Wire.setClock(100000);
@@ -29,7 +31,7 @@ void setup()
   LTC.enable_Tintern_Vcc(true);
   LTC.set_Kelvin_Tintern();
 
-  // to get multiple readings in loop()
+  //  to get multiple readings in loop()
   LTC.set_acquisition_repeat();
 }
 
diff --git a/libraries/LTC2991/examples/LTC2991_read_temperature/LTC2991_read_temperature.ino b/libraries/LTC2991/examples/LTC2991_read_temperature/LTC2991_read_temperature.ino
index 9521580e..8f12d9ba 100644
--- a/libraries/LTC2991/examples/LTC2991_read_temperature/LTC2991_read_temperature.ino
+++ b/libraries/LTC2991/examples/LTC2991_read_temperature/LTC2991_read_temperature.ino
@@ -1,7 +1,8 @@
 //
 //    FILE: LTC2991_read_temperature.ino
 //  AUTHOR: Rob Tillaart
-// PUPROSE: demo
+// PURPOSE: demo
+//     URL: https://github.com/RobTillaart/LTC2991
 
 
 #include "Wire.h"
@@ -15,8 +16,9 @@ void setup()
 {
   Serial.begin(115200);
   Serial.println(__FILE__);
-  Serial.print("LTC2991_LIB_VERSION:\t");
+  Serial.print("LTC2991_LIB_VERSION: ");
   Serial.println(LTC2991_LIB_VERSION);
+  Serial.println();
 
   Wire.begin();
   Wire.setClock(100000);
diff --git a/libraries/LTC2991/examples/LTC2991_read_voltage/LTC2991_read_voltage.ino b/libraries/LTC2991/examples/LTC2991_read_voltage/LTC2991_read_voltage.ino
index a47ae078..5a839c22 100644
--- a/libraries/LTC2991/examples/LTC2991_read_voltage/LTC2991_read_voltage.ino
+++ b/libraries/LTC2991/examples/LTC2991_read_voltage/LTC2991_read_voltage.ino
@@ -1,7 +1,8 @@
 //
 //    FILE: LTC2991_read_voltage.ino
 //  AUTHOR: Rob Tillaart
-// PUPROSE: demo
+// PURPOSE: demo
+//     URL: https://github.com/RobTillaart/LTC2991
 
 
 #include "Wire.h"
@@ -15,8 +16,9 @@ void setup()
 {
   Serial.begin(115200);
   Serial.println(__FILE__);
-  Serial.print("LTC2991_LIB_VERSION:\t");
+  Serial.print("LTC2991_LIB_VERSION: ");
   Serial.println(LTC2991_LIB_VERSION);
+  Serial.println();
 
   Wire.begin();
   Wire.setClock(100000);
diff --git a/libraries/LTC2991/library.json b/libraries/LTC2991/library.json
index d1996e30..a7d50526 100644
--- a/libraries/LTC2991/library.json
+++ b/libraries/LTC2991/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/LTC2991.git"
   },
-  "version": "0.2.0",
+  "version": "0.2.1",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",
diff --git a/libraries/LTC2991/library.properties b/libraries/LTC2991/library.properties
index e5bebe36..ad27efdc 100644
--- a/libraries/LTC2991/library.properties
+++ b/libraries/LTC2991/library.properties
@@ -1,5 +1,5 @@
 name=LTC2991
-version=0.2.0
+version=0.2.1
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for LTC2991 temperature and voltage control IC