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UART Modbus Server Example

  1. UART Modbus server is created with UART0 as a port, Modbus RTU protocol and station address 1.
  2. UART0 is initialized.
  3. UART0 parameters are set to 115200 bps, 8 data bits, even parity, 1 stop bit and no flow control.
  4. UART0 is enabled.
  5. A single buffer is created with a size of 500 bytes and is mapped to 4 server memory areas:
    • coils (addresses 0..3999)
    • discrete inputs (addresses 0..3999)
    • holding registers (addresses 0..249)
    • input registers (addresses 0..249)
  6. UART Modbus server is enabled.