# Change Log MCP23017_RT

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/).


## [0.4.0] - 2023-02-04
- breaking REV D chips => new release
- no change in code compared to 0.3.3
- update readme.md REV D
- update GitHub actions
- update license 2023

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## [0.3.2] - 2022-11-17
- add RP2040 in build-CI
- add changelog.md
- edit readme.md
- fix version number .cpp

## [0.3.1] - 2022-09-28
- optimize digitalWrite() - most used one only.

## [0.3.0] - 2022-06-28
- fix incorrect masking - see #10 MCP23S17

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## [0.2.6] - 2022-01-09
- add 16 bit interface
- update register defines

## [0.2.5] - 2021-12-21
- update library.json
- update license
- minor edits

## [0.2.4] - 2021-09-16
- add polarity support
- add pull-up support

## [0.2.3] - 2021-06-06
- add lastError() unit test + minor refactor.

## [0.2.2] - 2021-04-23
- fix for platformIO compatibility

## [0.2.1] - 2021-02-17
- fix #7 DDR is defined in ESP32

## [0.2.0] - 2021-01-11
- Multiple Wire support Wire0 .. 5
- error handling

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## [0.1.2] - 2021-01-01
- add Arduino-CI + unit test

## [0.1.1] - 2020-06-19
- refactor
- add #pragma once

## [0.1.0] - 2019-10-12
- initial version.