diff --git a/libraries/weight/.arduino-ci.yml b/libraries/weight/.arduino-ci.yml
index a09e5128..1f989667 100644
--- a/libraries/weight/.arduino-ci.yml
+++ b/libraries/weight/.arduino-ci.yml
@@ -1,12 +1,29 @@
+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
+  #  selected only those that work
   platforms:
     - uno
-    - due
-    - zero
-    - leonardo
+    # - due
+    # - zero
+    # - leonardo
     - m4
     - esp32
     - esp8266
-    - mega2560
+    # - mega2560
+    - rpipico
 
diff --git a/libraries/weight/CHANGELOG.md b/libraries/weight/CHANGELOG.md
new file mode 100644
index 00000000..d330434a
--- /dev/null
+++ b/libraries/weight/CHANGELOG.md
@@ -0,0 +1,29 @@
+# Change Log tinySHT2x
+
+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/).
+
+
+## [0.1.4] - 2022-11-26
+- Add RP2040 support to build-CI.
+- Add CHANGELOG.md
+- update readme.md
+
+
+## [0.1.3] - 2021-12-29
+- update library.json
+- update readme.md
+- update license
+- minor edits
+
+## [0.1.2] - 2021-01-09
+- fix URL
+
+## [0.1.1] - 2021-01-09
+- add Arduino-CI + unit test
+
+## [0.1.0] - 2020-06-16
+- initial version
+
diff --git a/libraries/weight/README.md b/libraries/weight/README.md
index 90021a77..d1d1ff4d 100644
--- a/libraries/weight/README.md
+++ b/libraries/weight/README.md
@@ -55,20 +55,31 @@ Functions are straightforward.
 See examples
 
 
-## Future (TBD)
+## Future
 
+#### must
 - improve documentation
+
+#### should
+- a class like the temperature convertor and pressure convertor
+  - internally grams?
+  - getters setters
+
+#### could
+- create data types of stone lbs kilo etc.?
+
+#### won't (unless)
+- large masses - sun planets ?   (see relativity library)
+- gravity constants of planets REL or ABS eg REL_GRAVITY_EARTH 1.0
 - mass of all elements
   - an array of floats
   - a compressed format with access function (1 byte/ element)
   - constants e.g. MASS_OXYGEN
+  - separate periodicTable.h file ?
 - molarity functions
 - mass of common substances.
-- large masses - sun planets ?
-- gravity constants of planets REL or ABS eg REL_GRAVITY_EARTH 1.0
 - teaspoon
-  - although that is a volume unit.
+  - that is a volume unit.
   - volume conversion too?
-- create data types of stone lbs kilo etc.?
 
 
diff --git a/libraries/weight/library.json b/libraries/weight/library.json
index 492aaa43..d2cd3d43 100644
--- a/libraries/weight/library.json
+++ b/libraries/weight/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/weight"
   },
-  "version": "0.1.3",
+  "version": "0.1.4",
   "license": "MIT",
   "frameworks": "arduino",
   "platforms": "*",
diff --git a/libraries/weight/library.properties b/libraries/weight/library.properties
index d0ee7e48..b1d6b282 100644
--- a/libraries/weight/library.properties
+++ b/libraries/weight/library.properties
@@ -1,5 +1,5 @@
 name=weight
-version=0.1.3
+version=0.1.4
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Library of weight conversion functions
diff --git a/libraries/weight/weight.h b/libraries/weight/weight.h
index 0e2b016d..fc683bc4 100644
--- a/libraries/weight/weight.h
+++ b/libraries/weight/weight.h
@@ -2,21 +2,15 @@
 //
 //    FILE: weight.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.3
+// VERSION: 0.1.4
 // PURPOSE: Collection weight conversion functions
 //     URL: https://github.com/RobTillaart/weight
-//
-//  HISTORY:
-//  0.1.0   2020-06-16  initial version
-//  0.1.1   2021-01-09  add Arduino-CI + unit test
-//  0.1.2   2021-01-09  fix URL
-//  0.1.3   2021-12-29  update library.json, license, minor edits
 
 
 #include "Arduino.h"
 
 
-#define WEIGHT_LIB_VERSION        (F("0.1.3"))
+#define WEIGHT_LIB_VERSION        (F("0.1.4"))
 
 
 float lbs2kilo(float lbs)     { return lbs   * 0.45359237; };
@@ -38,7 +32,7 @@ float stone2kilo(float stone) { return stone * 6.35029318; };
 float kilo2stone(float kilo)  { return kilo  * 0.157473044; };
 
 
-// returns kilo
+//  returns kilo
 float US2metric(float stone, float lbs, float ounce)
 {
   float kilo = stone * 6.35029318;
@@ -48,7 +42,7 @@ float US2metric(float stone, float lbs, float ounce)
 };
 
 
-// returns lbs;
+//  returns lbs;
 float metric2US(float kilo, float &stone, float &lbs, float &ounce)
 {
   float val = kilo * 2.20462262;