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// Copyright 2014 Quoc-Viet Nguyen. All rights reserved.
// This software may be modified and distributed under the terms
// of the BSD license. See the LICENSE file for details.
package modbus
type Client interface {
// Bit access
// ReadCoils reads from 1 to 2000 contiguous status of coils in a
// remote device and returns coil status.
ReadCoils(address, quantity uint16) (results []byte, err error)
// ReadDiscreteInputs reads from 1 to 2000 contiguous status of
// discrete inputs in a remote device and returns input status.
ReadDiscreteInputs(address, quantity uint16) (results []byte, err error)
// WriteSingleCoil write a single output to either ON or OFF in a
// remote device and returns output value.
WriteSingleCoil(address, value uint16) (results []byte, err error)
// WriteMultipleCoils forces each coil in a sequence of coils to either
// ON or OFF in a remote device and returns quantity of outputs.
WriteMultipleCoils(address, quantity uint16, value []byte) (results []byte, err error)
// 16-bit access
// ReadInputRegisters reads from 1 to 125 contiguous input registers in
// a remote device and returns input registers.
ReadInputRegisters(address, quantity uint16) (results []byte, err error)
// ReadHoldingRegisters reads the contents of a contiguous block of
// holding registers in a remote device and returns register value.
ReadHoldingRegisters(address, quantity uint16) (results []byte, err error)
// WriteSingleRegister writes a single holding register in a remote
// device and returns register value.
WriteSingleRegister(address, value uint16) (results []byte, err error)
// WriteMultipleRegisters writes a block of contiguous registers
// (1 to 123 registers) in a remote device and returns quantity of
// registers.
WriteMultipleRegisters(address, quantity uint16, value []byte) (results []byte, err error)
// ReadWriteMultipleRegisters performs a combination of one read
// operation and one write operation. It returns read registers value.
ReadWriteMultipleRegisters(readAddress, readQuantity, writeAddress, writeQuantity uint16, value []byte) (results []byte, err error)
// MaskWriteRegister modify the contents of a specified holding
// register using a combination of an AND mask, an OR mask, and the
// register's current contents. The function returns
// AND-mask and OR-mask.
MaskWriteRegister(address, andMask, orMask uint16) (results []byte, err error)
//ReadFIFOQueue reads the contents of a First-In-First-Out (FIFO) queue
// of register in a remote device and returns FIFO value register.
ReadFIFOQueue(address uint16) (results []byte, err error)
}
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