diff --git a/libraries/MCP23008/.arduino-ci.yml b/libraries/MCP23008/.arduino-ci.yml
index cecf5850..25980972 100644
--- a/libraries/MCP23008/.arduino-ci.yml
+++ b/libraries/MCP23008/.arduino-ci.yml
@@ -1,3 +1,18 @@
+platforms:
+  rpipico:
+    board: rp2040:rp2040:rpipico
+    package: rp2040:rp2040
+    gcc:
+      features:
+      defines:
+        - ARDUINO_ARCH_RP2040
+      warnings:
+      flags:
+
+packages:
+  rp2040:rp2040:
+    url: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
+
 compile:
   # Choosing to run compilation tests on 2 different Arduino platforms
   platforms:
@@ -9,3 +24,4 @@ compile:
     - esp32
     # - esp8266
     # - mega2560
+    - rpipico
diff --git a/libraries/MCP23008/CHANGELOG.md b/libraries/MCP23008/CHANGELOG.md
new file mode 100644
index 00000000..d5d8c5ae
--- /dev/null
+++ b/libraries/MCP23008/CHANGELOG.md
@@ -0,0 +1,23 @@
+# Change Log MCP23008
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+
+## [0.1.2] - 2022-11-17
+- add RP2040 in build-CI
+- add changelog.md
+- minor edit readme.md
+- update datasheet page numbers of registers MCP23008.cpp
+
+
+## [0.1.1] - 2022-09-28 
+- optimize digitalWrite() - as that is the most used one
+
+## [0.1.0] - 2022-01-10
+- initial version released
+
+## [0.0.0] - 2019-10-12
+- pre release
\ No newline at end of file
diff --git a/libraries/MCP23008/MCP23008.cpp b/libraries/MCP23008/MCP23008.cpp
index 2bee866f..dd083fd2 100644
--- a/libraries/MCP23008/MCP23008.cpp
+++ b/libraries/MCP23008/MCP23008.cpp
@@ -1,32 +1,27 @@
 //
 //    FILE: MCP23008.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
+// VERSION: 0.1.2
 // PURPOSE: Arduino library for I2C MCP23008 8 channel port expander
 //    DATE: 2019-10-12
 //     URL: https://github.com/RobTillaart/MCP23008
-//
-//  HISTORY:
-//  0.1.0   2022-01-10  initial version
-//  0.1.1   2022-09-28  optimize digitalWrite() [as that is the most used one]
-
 
 
 #include "MCP23008.h"
 
 
-//  Registers                         // description                 datasheet
-#define MCP23008_DDR_A        0x00    // Data Direction Register A   P
-#define MCP23008_POL_A        0x01    // Input Polarity A            P
-#define MCP23008_GPINTEN_A    0x02    // NOT USED interrupt enable   P
-#define MCP23008_DEFVAL_A     0x03    // NOT USED interrupt def      P
-#define MCP23008_INTCON_A     0x04    // NOT USED interrupt control  P
-#define MCP23008_IOCR         0x05    // IO control register         P
-#define MCP23008_PUR_A        0x06    // Pull Up Resistors A         P
-#define MCP23008_INTF_A       0x07    // NOT USED interrupt flag     P
-#define MCP23008_INTCAP_A     0x08    // NOT USED interrupt capture  P
-#define MCP23008_GPIO_A       0x09    // General Purpose IO A        P
-#define MCP23008_OLAT_A       0x0A    // NOT USED output latch       P
+//  Registers                         //   DESCRIPTION                  DATASHEET
+#define MCP23008_DDR_A        0x00    //   Data Direction Register A      P 10
+#define MCP23008_POL_A        0x01    //   Input Polarity A               P 11
+#define MCP23008_GPINTEN_A    0x02    //   NOT USED interrupt enable      P 12
+#define MCP23008_DEFVAL_A     0x03    //   NOT USED interrupt def         P 13
+#define MCP23008_INTCON_A     0x04    //   NOT USED interrupt control     P 14
+#define MCP23008_IOCR         0x05    //   IO control register            P 15
+#define MCP23008_PUR_A        0x06    //   Pull Up Resistors A            P 16
+#define MCP23008_INTF_A       0x07    //   NOT USED interrupt flag        P 17
+#define MCP23008_INTCAP_A     0x08    //   NOT USED interrupt capture     P 18
+#define MCP23008_GPIO_A       0x09    //   General Purpose IO A           P 19
+#define MCP23008_OLAT_A       0x0A    //   NOT USED output latch          P 20
 
 
 MCP23008::MCP23008(uint8_t address, TwoWire *wire)
diff --git a/libraries/MCP23008/MCP23008.h b/libraries/MCP23008/MCP23008.h
index 8f1c4da2..1552467a 100644
--- a/libraries/MCP23008/MCP23008.h
+++ b/libraries/MCP23008/MCP23008.h
@@ -2,7 +2,7 @@
 //
 //    FILE: MCP23008.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
+// VERSION: 0.1.2
 // PURPOSE: Arduino library for I2C MCP23008 16 channel port expander
 //    DATE: 2022-01-10
 //     URL: https://github.com/RobTillaart/MCP23008
@@ -12,7 +12,7 @@
 #include "Wire.h"
 
 
-#define MCP23008_LIB_VERSION              (F("0.1.1"))
+#define MCP23008_LIB_VERSION              (F("0.1.2"))
 
 #define MCP23008_OK                       0x00
 #define MCP23008_PIN_ERROR                0x81
@@ -36,8 +36,8 @@ public:
   bool    isConnected();
 
 
-  // single pin interface
-  // mode = INPUT, OUTPUT or INPUT_PULLUP (==INPUT)
+  //      single pin interface
+  //      mode =  INPUT,  OUTPUT or  INPUT_PULLUP (== INPUT)
   bool    pinMode(uint8_t pin, uint8_t mode);
   bool    digitalWrite(uint8_t pin, uint8_t value);
   uint8_t digitalRead(uint8_t pin);
@@ -48,8 +48,8 @@ public:
   bool    getPullup(uint8_t pin, bool &pullup);
 
 
-  // 8 pins interface
-  // value = bit pattern
+  //      8 pins interface
+  //      value = bit pattern
   bool    pinMode8(uint8_t value);
   bool    write8(uint8_t value);
   int     read8();
diff --git a/libraries/MCP23008/README.md b/libraries/MCP23008/README.md
index 9680db0b..d18531ec 100644
--- a/libraries/MCP23008/README.md
+++ b/libraries/MCP23008/README.md
@@ -62,13 +62,13 @@ If one of the above functions return false, there might be an error.
 - **int lastError()** Above functions set an error flag that can be read with this function.  
 Reading it will reset the flag to **MCP23008_OK**.
 
-| DESCRIPTION           | VALUE |
-|:----------------------|:-----:|
-| MCP23008_OK           |  0x00 |
-| MCP23008_PIN_ERROR    |  0x81 |
-| MCP23008_I2C_ERROR    |  0x82 |
-| MCP23008_VALUE_ERROR  |  0x83 |
-| MCP23008_PORT_ERROR   |  0x84 |
+|  DESCRIPTION           |  VALUE  |
+|:-----------------------|:-------:|
+|  MCP23008_OK           |  0x00   |
+|  MCP23008_PIN_ERROR    |  0x81   |
+|  MCP23008_I2C_ERROR    |  0x82   |
+|  MCP23008_VALUE_ERROR  |  0x83   |
+|  MCP23008_PORT_ERROR   |  0x84   |
 
 
 ## Operation
diff --git a/libraries/MCP23008/library.json b/libraries/MCP23008/library.json
index c885b366..be9a4e87 100644
--- a/libraries/MCP23008/library.json
+++ b/libraries/MCP23008/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/MCP23008.git"
   },
-  "version": "0.1.1",
+  "version": "0.1.2",
   "license": "MIT",
   "frameworks": "arduino",
   "platforms": "*",
diff --git a/libraries/MCP23008/library.properties b/libraries/MCP23008/library.properties
index 3aefd039..abe50ae5 100644
--- a/libraries/MCP23008/library.properties
+++ b/libraries/MCP23008/library.properties
@@ -1,5 +1,5 @@
 name=MCP23008
-version=0.1.1
+version=0.1.2
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for I2C MCP23008 8 channel port expander  8 IO-lines