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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.2.1 - 2025-11-12

Fixed

  • Nerves Support: Fixed "command not found" error (exit code 127) when running on embedded systems like Raspberry Pi
  • All executables now link statically with libplctag, eliminating runtime shared library dependencies
  • Debug output from libplctag now captured consistently on both development and embedded systems

Added

  • Comprehensive Nerves documentation in README with troubleshooting guide
  • Verified platform compatibility list (RPi 3B+, RPi 4, RPi Zero W, BeagleBone Black)
  • NERVES_DEBUG.md with detailed debugging information
  • stderr_to_stdout option in CmdWrapper to capture debug logs from libplctag

Changed

  • BREAKING: All executables now always use static linking for consistency and portability
  • Simplified CMakeLists.txt by removing conditional linking logic
  • Binaries now work identically on development (HOST) and embedded (Target) systems
  • CmdWrapper now captures both stdout and stderr for better debug visibility

0.2.0 - 2024

Added

  • Updated libplctag from v2.0.26 to v2.6.12
  • New Abex.Tag.Raw module for low-level PLC operations
  • Support for 64-bit data types (uint64, sint64, real64)
  • Support for string, bit, raw, and metadata data types
  • Abex.Cmd.Behaviour and Abex.Cmd.Wrapper for command execution abstraction
  • Unified tag listing supporting multiple PLC types
  • UDT (User Defined Types) introspection
  • Comprehensive test coverage with Mox-based mocking
  • Enhanced documentation with usage examples

Changed

  • Protocol string changed from ab_eip to ab-eip
  • Parameter cpu changed to plc in internal calls
  • Moved Abex.Tag to lib/tag/ directory for better organization
  • Combined list_tags_logix.c and list_tags_micro8x0.c into single tag_list.c
  • Updated C source files to use new libplctag API

Fixed

  • Adapted rw_tag.c and tag_list.c to new libplctag API
  • Improved error handling in all modules

0.1.2 - Earlier

Initial Features

  • GenServer-based interface for PLC communication
  • Basic read/write operations
  • Tag listing functionality
  • Support for ControlLogix, CompactLogix, and Micro800 PLCs
  • Integration with libplctag v2.0.26