  ## --- "register" configuration style ---

  ## Measurements
  ##

  ## Digital Variables, Discrete Inputs and Coils
  ## measurement - the (optional) measurement name, defaults to "modbus"
  ## name        - the variable name
  ## data_type   - the (optional) output type, can be BOOL or UINT16 (default)
  ## address     - variable address

  discrete_inputs = [
    { name = "start",          address = [0]},
    { name = "stop",           address = [1]},
    { name = "reset",          address = [2]},
    { name = "emergency_stop", address = [3]},
  ]
  coils = [
    { name = "motor1_run",     address = [0]},
    { name = "motor1_jog",     address = [1]},
    { name = "motor1_stop",    address = [2]},
  ]

  ## Analog Variables, Input Registers and Holding Registers
  ## measurement - the (optional) measurement name, defaults to "modbus"
  ## name        - the variable name
  ## byte_order  - the ordering of bytes
  ##  |---AB, ABCD   - Big Endian
  ##  |---BA, DCBA   - Little Endian
  ##  |---BADC       - Mid-Big Endian
  ##  |---CDAB       - Mid-Little Endian
  ## data_type   - BIT (single bit of a register)
  ##               INT8L, INT8H, UINT8L, UINT8H (low and high byte variants)
  ##               INT16, UINT16, INT32, UINT32, INT64, UINT64,
  ##               FLOAT16-IEEE, FLOAT32-IEEE, FLOAT64-IEEE (IEEE 754 binary representation)
  ##               FIXED, UFIXED (fixed-point representation on input)
  ##               STRING (byte-sequence converted to string)
  ## bit         - (optional) bit of the register, ONLY valid for BIT type
  ## scale       - the final numeric variable representation
  ## address     - variable address

  holding_registers = [
    { name = "power_factor", byte_order = "AB",   data_type = "FIXED", scale=0.01,  address = [8]},
    { name = "voltage",      byte_order = "AB",   data_type = "FIXED", scale=0.1,   address = [0]},
    { name = "energy",       byte_order = "ABCD", data_type = "FIXED", scale=0.001, address = [5,6]},
    { name = "current",      byte_order = "ABCD", data_type = "FIXED", scale=0.001, address = [1,2]},
    { name = "frequency",    byte_order = "AB",   data_type = "UFIXED", scale=0.1,  address = [7]},
    { name = "power",        byte_order = "ABCD", data_type = "UFIXED", scale=0.1,  address = [3,4]},
    { name = "firmware",     byte_order = "AB",   data_type = "STRING", address = [5, 6, 7, 8, 9, 10, 11, 12]},
  ]
  input_registers = [
    { name = "tank_level",   byte_order = "AB",   data_type = "INT16",   scale=1.0,     address = [0]},
    { name = "tank_ph",      byte_order = "AB",   data_type = "INT16",   scale=1.0,     address = [1]},
    { name = "pump1_speed",  byte_order = "ABCD", data_type = "INT32",   scale=1.0,     address = [3,4]},
  ]
