diff --git a/libraries/I2CKeyPad/.arduino-ci.yml b/libraries/I2CKeyPad/.arduino-ci.yml
index cecf5850..77a333f9 100644
--- a/libraries/I2CKeyPad/.arduino-ci.yml
+++ b/libraries/I2CKeyPad/.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:
@@ -7,5 +22,7 @@ compile:
     # - leonardo
     - m4
     - esp32
-    # - esp8266
+    - esp8266
     # - mega2560
+    - rpipico
+
diff --git a/libraries/I2CKeyPad/CHANGELOG.md b/libraries/I2CKeyPad/CHANGELOG.md
new file mode 100644
index 00000000..f59cb93a
--- /dev/null
+++ b/libraries/I2CKeyPad/CHANGELOG.md
@@ -0,0 +1,51 @@
+# Change Log I2CKeyPad
+
+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/).
+
+
+## [0.3.3] - 2022-11-12
+- Add RP2040 support to build-CI.
+- Add CHANGELOG.md
+
+
+## [0.3.2] - 2022-09-19
+- experimental version
+- add 5x3, 6x2 and 8x1 support
+- moved all code to .cpp file
+
+## [0.3.1] - 2021-12-19
+- update library.json
+- update license
+- minor edits
+
+## [0.3.0] - 2021-11-04
+- add key mapping functions.
+
+----
+
+## [0.2.1] - 2021-05-06
+- add \_read(0xF0) to begin() to enable PCF8574
+- interrupts. (#5 thanks to JohnMac1234)
+
+## [0.2.0] - 2021-05-06
+- MultiWire ... (breaking interface)
+
+----
+
+## [0.1.2] - 2020-12-27
+- Arduino-CI + unit test
+
+## [0.1.1] - 2020-07-05
+- fix compilation for ESP32
+
+## [0.1.0] - 2020-06-26
+- first release
+
+-----
+
+## [0.0.1] - 2019-10-01
+- initial version
+
diff --git a/libraries/I2CKeyPad/I2CKeyPad .cpp b/libraries/I2CKeyPad/I2CKeyPad .cpp
index f66e3ada..098792c9 100644
--- a/libraries/I2CKeyPad/I2CKeyPad .cpp	
+++ b/libraries/I2CKeyPad/I2CKeyPad .cpp	
@@ -1,25 +1,11 @@
 //
 //    FILE: I2CKeyPad.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.3.2
+// VERSION: 0.3.3
 // PURPOSE: Arduino library for 4x4 KeyPad connected to an I2C PCF8574
 //     URL: https://github.com/RobTillaart/I2CKeyPad
 //
-//  HISTORY:
-//  0.0.1  2019-10-01  initial version
-//  0.1.0  2020-06-26  first release
-//  0.1.1  2020-07-05  fix compilation for ESP32
-//  0.1.2  2020-12-27  Arduino-CI + unit test
-//
-//  0.2.0  2021-05-06  MultiWire ... (breaking interface)
-//  0.2.1  2021-05-06  add _read(0xF0) to begin() to enable PCF8574
-//                     interrupts. (#5 thanks to JohnMac1234)
-//
-//  0.3.0  2021-11-04  add key mapping functions.
-//  0.3.1  2021-12-19  update library.json, license, minor edits
-//  0.3.2  2022-09-19  experimental version
-//                     add 5x3, 6x2 and 8x1 support
-//                     moved all code to .cpp file.
+// HISTORY: see changelog.md
 
 
 #include "I2CKeyPad.h"
diff --git a/libraries/I2CKeyPad/I2CKeyPad.h b/libraries/I2CKeyPad/I2CKeyPad.h
index 9aa22683..01a9aee8 100644
--- a/libraries/I2CKeyPad/I2CKeyPad.h
+++ b/libraries/I2CKeyPad/I2CKeyPad.h
@@ -2,7 +2,7 @@
 //
 //    FILE: I2CKeyPad.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.3.2
+// VERSION: 0.3.3
 // PURPOSE: Arduino library for 4x4 KeyPad connected to an I2C PCF8574
 //     URL: https://github.com/RobTillaart/I2CKeyPad
 
@@ -11,7 +11,7 @@
 #include "Wire.h"
 
 
-#define I2C_KEYPAD_LIB_VERSION    (F("0.3.2"))
+#define I2C_KEYPAD_LIB_VERSION    (F("0.3.3"))
 
 #define I2C_KEYPAD_NOKEY          16
 #define I2C_KEYPAD_FAIL           17
diff --git a/libraries/I2CKeyPad/library.json b/libraries/I2CKeyPad/library.json
index c4a940bc..e895e053 100644
--- a/libraries/I2CKeyPad/library.json
+++ b/libraries/I2CKeyPad/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/I2CKeyPad.git"
   },
-  "version": "0.3.2",
+  "version": "0.3.3",
   "license": "MIT",
   "frameworks": "arduino",
   "platforms": "*",
diff --git a/libraries/I2CKeyPad/library.properties b/libraries/I2CKeyPad/library.properties
index 2890a3b4..3ebb790d 100644
--- a/libraries/I2CKeyPad/library.properties
+++ b/libraries/I2CKeyPad/library.properties
@@ -1,5 +1,5 @@
 name=I2CKeyPad
-version=0.3.2
+version=0.3.3
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for a KeyPad connected to a PCF8574.