diff --git a/libraries/Adler/.arduino-ci.yml b/libraries/Adler/.arduino-ci.yml
index 5ad41716..d9b3a2aa 100644
--- a/libraries/Adler/.arduino-ci.yml
+++ b/libraries/Adler/.arduino-ci.yml
@@ -1,14 +1,30 @@
+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:
     - uno
-    - due
-    - zero
-    - leonardo
+    # - due
+    # - zero
+    # - leonardo
     - m4
     - esp32
     - esp8266
-    - mega2560
+    # - mega2560
+    - rpipico
 
   libraries:
     - "printHelpers"
diff --git a/libraries/Adler/Adler.cpp b/libraries/Adler/Adler.cpp
index 0b411639..b4389a47 100644
--- a/libraries/Adler/Adler.cpp
+++ b/libraries/Adler/Adler.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: Adler.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2022-01-27
 // PURPOSE: Arduino Library for calculating Adler checksum
 //     URL: https://github.com/RobTillaart/Adler
diff --git a/libraries/Adler/Adler.h b/libraries/Adler/Adler.h
index 063e4f84..fd208377 100644
--- a/libraries/Adler/Adler.h
+++ b/libraries/Adler/Adler.h
@@ -2,7 +2,7 @@
 //
 //    FILE: Adler.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2022-01-27
 // PURPOSE: Arduino Library for calculating Adler checksum
 //     URL: https://github.com/RobTillaart/Adler
@@ -12,7 +12,7 @@
 #include "Arduino.h"
 
 
-#define ADLER_LIB_VERSION        (F("0.2.1"))
+#define ADLER_LIB_VERSION        (F("0.2.2"))
 
 
 const uint32_t ADLER32_MOD_PRIME = 65521;
diff --git a/libraries/Adler/Adler16.cpp b/libraries/Adler/Adler16.cpp
index 6c482b0c..263c3353 100644
--- a/libraries/Adler/Adler16.cpp
+++ b/libraries/Adler/Adler16.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: Adler16.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2022-06-14
 // PURPOSE: Arduino Library for calculating Adler-16 checksum
 //     URL: https://github.com/RobTillaart/Adler
@@ -11,7 +11,6 @@
 // HISTORY: see CHANGELOG.md
 
 
-
 #include "Adler16.h"
 
 
diff --git a/libraries/Adler/Adler16.h b/libraries/Adler/Adler16.h
index 3743bef1..a2d33be2 100644
--- a/libraries/Adler/Adler16.h
+++ b/libraries/Adler/Adler16.h
@@ -2,7 +2,7 @@
 //
 //    FILE: Adler16.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2022-06-15
 // PURPOSE: Arduino Library for calculating Adler-16 checksum
 //     URL: https://github.com/RobTillaart/Adler
@@ -13,7 +13,7 @@
 #include "Arduino.h"
 
 
-#define ADLER16_LIB_VERSION              (F("0.2.1"))
+#define ADLER16_LIB_VERSION              (F("0.2.2"))
 
 
 //  largest prime below 2^8
diff --git a/libraries/Adler/Adler32.cpp b/libraries/Adler/Adler32.cpp
index 91535c14..97e51b37 100644
--- a/libraries/Adler/Adler32.cpp
+++ b/libraries/Adler/Adler32.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: Adler32.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2022-01-27
 // PURPOSE: Arduino Library for calculating Adler-32 checksum
 //     URL: https://github.com/RobTillaart/Adler
@@ -10,7 +10,6 @@
 // HISTORY: see CHANGELOG.md
 
 
-
 #include "Adler32.h"
 
 
diff --git a/libraries/Adler/Adler32.h b/libraries/Adler/Adler32.h
index 7953ec02..2e3463ef 100644
--- a/libraries/Adler/Adler32.h
+++ b/libraries/Adler/Adler32.h
@@ -2,7 +2,7 @@
 //
 //    FILE: Adler.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2022-01-27
 // PURPOSE: Arduino Library for calculating Adler-32 checksum
 //     URL: https://github.com/RobTillaart/Adler
@@ -12,7 +12,7 @@
 #include "Arduino.h"
 
 
-#define ADLER32_LIB_VERSION        (F("0.2.1"))
+#define ADLER32_LIB_VERSION        (F("0.2.2"))
 
 
 //  largest prime below 2^16
diff --git a/libraries/Adler/CHANGELOG.md b/libraries/Adler/CHANGELOG.md
index c3b7ab2f..8f34e2a1 100644
--- a/libraries/Adler/CHANGELOG.md
+++ b/libraries/Adler/CHANGELOG.md
@@ -1,19 +1,21 @@
-# Change Log
+# Change Log ADLER
 
 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/).
 
-## [0.2.1] - 2022-09-20
+## [0.2.2] - 2022-10-26
+- add RP2040 to build-CI
 
+
+## [0.2.1] - 2022-09-20
 - return value added to **add(array)** 
 - return value added to **addFast(array, length)** 
 - update documentation (e.g. timing table).
 - moved count() to .cpp
 
 ## [0.2.0] - 2022-06-15
-
 - breaking change 
 - reordering files.
 - Adler.h for static functions
@@ -21,8 +23,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Adler16.h for Adler16 class (experimental).
 - Added optimizations.
 
-## [0.1.2] - 2022-06-13
+----
 
+## [0.1.2] - 2022-06-13
 - split interface and implementation
 - rename ADLER32_MOD_PRIME
 - rename ADLER32_LIB_VERSION
@@ -30,11 +33,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - add char interfaces
 
 ## [0.1.1] - 2022-04-15
-
 - split of .cpp file
 
 ### [0.1.0] - 2022-01-27
-
 - initial version
 
 
diff --git a/libraries/Adler/examples/Adler16_performance/Adler16_performance.ino b/libraries/Adler/examples/Adler16_performance/Adler16_performance.ino
index 718bdfe3..78a07467 100644
--- a/libraries/Adler/examples/Adler16_performance/Adler16_performance.ino
+++ b/libraries/Adler/examples/Adler16_performance/Adler16_performance.ino
@@ -2,6 +2,8 @@
 //    FILE: Adler16_performance.ino
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo
+//     URL: https://github.com/RobTillaart/Adler
+
 
 #include "Arduino.h"
 #include "Adler16.h"
@@ -30,7 +32,6 @@ nisi vel augue. Curabitur ullamcorper ultricies nisi. Nam eget dui.";
 char hello[] = "hello world";
 
 
-
 void setup()
 {
   Serial.begin(115200);
diff --git a/libraries/Adler/examples/Adler16_test/Adler16_test.ino b/libraries/Adler/examples/Adler16_test/Adler16_test.ino
index 6fab3c60..99ad6a0e 100644
--- a/libraries/Adler/examples/Adler16_test/Adler16_test.ino
+++ b/libraries/Adler/examples/Adler16_test/Adler16_test.ino
@@ -2,6 +2,8 @@
 //    FILE: Adler16_test.ino
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo
+//     URL: https://github.com/RobTillaart/Adler
+
 
 #include "Arduino.h"
 #include "Adler16.h"
diff --git a/libraries/Adler/examples/Adler32_performance/Adler32_performance.ino b/libraries/Adler/examples/Adler32_performance/Adler32_performance.ino
index 43e8e383..c8a55280 100644
--- a/libraries/Adler/examples/Adler32_performance/Adler32_performance.ino
+++ b/libraries/Adler/examples/Adler32_performance/Adler32_performance.ino
@@ -2,6 +2,8 @@
 //    FILE: Adler32_performance.ino
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo
+//     URL: https://github.com/RobTillaart/Adler
+
 
 #include "Arduino.h"
 #include "Adler32.h"
diff --git a/libraries/Adler/examples/Adler32_performance_addFast/Adler32_performance_addFast.ino b/libraries/Adler/examples/Adler32_performance_addFast/Adler32_performance_addFast.ino
index 0d1f9869..5a7866bd 100644
--- a/libraries/Adler/examples/Adler32_performance_addFast/Adler32_performance_addFast.ino
+++ b/libraries/Adler/examples/Adler32_performance_addFast/Adler32_performance_addFast.ino
@@ -2,12 +2,13 @@
 //    FILE: Adler32_performance_addFast.ino
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo
+//     URL: https://github.com/RobTillaart/Adler
+
 
 #include "Arduino.h"
 #include "Adler32.h"
 
 
-
 Adler32 ad;
 
 volatile uint8_t z;
diff --git a/libraries/Adler/examples/Adler32_test/Adler32_test.ino b/libraries/Adler/examples/Adler32_test/Adler32_test.ino
index eb203ee7..a9050828 100644
--- a/libraries/Adler/examples/Adler32_test/Adler32_test.ino
+++ b/libraries/Adler/examples/Adler32_test/Adler32_test.ino
@@ -2,6 +2,7 @@
 //    FILE: Adler32_test.ino
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo
+//     URL: https://github.com/RobTillaart/Adler
 
 #include "Arduino.h"
 #include "Adler32.h"
diff --git a/libraries/Adler/examples/Adler_performance/Adler_performance.ino b/libraries/Adler/examples/Adler_performance/Adler_performance.ino
index fa6f4989..fcc6a68d 100644
--- a/libraries/Adler/examples/Adler_performance/Adler_performance.ino
+++ b/libraries/Adler/examples/Adler_performance/Adler_performance.ino
@@ -2,6 +2,7 @@
 //    FILE: Adler_performance.ino
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo
+//     URL: https://github.com/RobTillaart/Adler
 
 #include "Arduino.h"
 #include "Adler.h"
diff --git a/libraries/Adler/examples/Adler_test/Adler_test.ino b/libraries/Adler/examples/Adler_test/Adler_test.ino
index 07f087c1..270591c1 100644
--- a/libraries/Adler/examples/Adler_test/Adler_test.ino
+++ b/libraries/Adler/examples/Adler_test/Adler_test.ino
@@ -2,7 +2,7 @@
 //    FILE: Adler_test.ino
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo
-
+//     URL: https://github.com/RobTillaart/Adler
 
 #include "Arduino.h"
 #include "Adler.h"
diff --git a/libraries/Adler/library.json b/libraries/Adler/library.json
index cc724123..f35efdb6 100644
--- a/libraries/Adler/library.json
+++ b/libraries/Adler/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/Adler.git"
   },
-  "version": "0.2.1",
+  "version": "0.2.2",
   "license": "MIT",
   "frameworks": "arduino",
   "platforms": "*",
diff --git a/libraries/Adler/library.properties b/libraries/Adler/library.properties
index 699d8478..6aa19b2a 100644
--- a/libraries/Adler/library.properties
+++ b/libraries/Adler/library.properties
@@ -1,5 +1,5 @@
 name=Adler
-version=0.2.1
+version=0.2.2
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino Library for calculating Adler-32 and Adler-16 checksum.