v0.1.0

Added

• Complete ANSI C12.18/C12.19 PSEM protocol implementation
  • L2 framing with STP (0xEE), CRC-16 verification, multi-packet support
  • L7 services: Identify, Negotiate, Logon, Security, Logoff, Terminate
  • Full table read/write (ReadFull, ReadOffset, WriteFull, WriteOffset)
  • Procedure execution via ST7/ST8
  • Baud rate negotiation support (300-38400)
• DLMS/COSEM (IEC 62056) protocol implementation
  • HDLC framing per IEC 62056-46
  • OBIS code system with well-known electricity metering objects
  • A-XDR (Adapted External Data Representation) codec
  • GET/SET/ACTION DLMS services
  • Authentication mechanism support (None, LLS, HLS)
• Pluggable transport layer via ITransport interface
  • SerialTransport (System.IO.Ports)
  • TcpTransport (async TCP with DNS resolution)
  • LoopbackTransport (System.IO.Pipelines, for testing)
• Full PSEM meter emulator
  • Complete session state machine (Idle -> Identified -> Negotiated -> LoggedOn -> Authenticated)
  • In-memory table store with pre-populated standard tables
  • EmulatorTransport for seamless client integration
• Result discriminated union for error handling without exceptions
• IAsyncEnumerable streaming for large table reads
• CRC-16 CCITT (reversed) calculation with lookup table
• Comprehensive enum types for all protocol values
• xUnit v3 test suite covering CRC, framing, encoding, transport, and emulator
• CI/CD pipeline with GitHub Actions
• Multi-target: net9.0 and net10.0
• Central package management via Directory.Packages.props