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modbus

package module

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Versions in this module

v1

v1.0.81

Sep 19, 2023

v1.0.72

Sep 19, 2023

v1.0.71

Sep 19, 2023

v1.0.70

Sep 19, 2023

v1.0.1

Aug 7, 2023

Changes in this version

+ const BIG_ENDIAN

+ const HIGH_WORD_FIRST

+ const HOLDING_REGISTER

+ const INPUT_REGISTER

+ const LITTLE_ENDIAN

+ const LOW_WORD_FIRST

+ const PARITY_EVEN

+ const PARITY_NONE

+ const PARITY_ODD

+ func LoadCertPool(filePath string) (cp *x509.CertPool, err error)

+ type ClientConfiguration struct

+ DataBits uint

+ Logger *log.Logger

+ Parity uint

+ Speed uint

+ StopBits uint

+ TLSClientCert *tls.Certificate

+ TLSRootCAs *x509.CertPool

+ Timeout time.Duration

+ URL string

+ type CoilsRequest struct

+ Addr uint16

+ Args []bool

+ ClientAddr string

+ ClientRole string

+ IsWrite bool

+ Quantity uint16

+ UnitId uint8

+ type DiscreteInputsRequest struct

+ Addr uint16

+ ClientAddr string

+ ClientRole string

+ Quantity uint16

+ UnitId uint8

+ type Endianness uint

+ type Error string

+ const ErrAcknowledge

+ const ErrBadCRC

+ const ErrBadTransactionId

+ const ErrBadUnitId

+ const ErrConfigurationError

+ const ErrGWPathUnavailable

+ const ErrGWTargetFailedToRespond

+ const ErrIllegalDataAddress

+ const ErrIllegalDataValue

+ const ErrIllegalFunction

+ const ErrMemoryParityError

+ const ErrProtocolError

+ const ErrRequestTimedOut

+ const ErrServerDeviceBusy

+ const ErrServerDeviceFailure

+ const ErrShortFrame

+ const ErrUnexpectedParameters

+ const ErrUnknownProtocolId

+ func (me Error) Error() (s string)

+ type HoldingRegistersRequest struct

+ Addr uint16

+ Args []uint16

+ ClientAddr string

+ ClientRole string

+ IsWrite bool

+ Quantity uint16

+ UnitId uint8

+ type InputRegistersRequest struct

+ Addr uint16

+ ClientAddr string

+ ClientRole string

+ Quantity uint16

+ UnitId uint8

+ type ModbusClient struct

+ func NewClient(conf *ClientConfiguration) (mc *ModbusClient, err error)

+ func (mc *ModbusClient) Close() (err error)

+ func (mc *ModbusClient) Open() (err error)

+ func (mc *ModbusClient) ReadBytes(addr uint16, quantity uint16, regType RegType) (values []byte, err error)

+ func (mc *ModbusClient) ReadCoil(addr uint16) (value bool, err error)

+ func (mc *ModbusClient) ReadCoils(addr uint16, quantity uint16) (values []bool, err error)

+ func (mc *ModbusClient) ReadDiscreteInput(addr uint16) (value bool, err error)

+ func (mc *ModbusClient) ReadDiscreteInputs(addr uint16, quantity uint16) (values []bool, err error)

+ func (mc *ModbusClient) ReadFileLines(recNumber uint16, quantity uint16) (values []uint16, err error)

+ func (mc *ModbusClient) ReadFloat32(addr uint16, regType RegType) (value float32, err error)

+ func (mc *ModbusClient) ReadFloat32s(addr uint16, quantity uint16, regType RegType) (values []float32, err error)

+ func (mc *ModbusClient) ReadFloat64(addr uint16, regType RegType) (value float64, err error)

+ func (mc *ModbusClient) ReadFloat64s(addr uint16, quantity uint16, regType RegType) (values []float64, err error)

+ func (mc *ModbusClient) ReadRawBytes(addr uint16, quantity uint16, regType RegType) (values []byte, err error)

+ func (mc *ModbusClient) ReadRegister(addr uint16, regType RegType) (value uint16, err error)

+ func (mc *ModbusClient) ReadRegisters(addr uint16, quantity uint16, regType RegType) (values []uint16, err error)

+ func (mc *ModbusClient) ReadUint32(addr uint16, regType RegType) (value uint32, err error)

+ func (mc *ModbusClient) ReadUint32s(addr uint16, quantity uint16, regType RegType) (values []uint32, err error)

+ func (mc *ModbusClient) ReadUint64(addr uint16, regType RegType) (value uint64, err error)

+ func (mc *ModbusClient) ReadUint64s(addr uint16, quantity uint16, regType RegType) (values []uint64, err error)

+ func (mc *ModbusClient) SetEncoding(endianness Endianness, wordOrder WordOrder) (err error)

+ func (mc *ModbusClient) SetUnitId(id uint8) (err error)

+ func (mc *ModbusClient) WriteBytes(addr uint16, values []byte) (err error)

+ func (mc *ModbusClient) WriteCoil(addr uint16, value bool) (err error)

+ func (mc *ModbusClient) WriteCoils(addr uint16, values []bool) (err error)

+ func (mc *ModbusClient) WriteFloat32(addr uint16, value float32) (err error)

+ func (mc *ModbusClient) WriteFloat32s(addr uint16, values []float32) (err error)

+ func (mc *ModbusClient) WriteFloat64(addr uint16, value float64) (err error)

+ func (mc *ModbusClient) WriteFloat64s(addr uint16, values []float64) (err error)

+ func (mc *ModbusClient) WriteRawBytes(addr uint16, values []byte) (err error)

+ func (mc *ModbusClient) WriteRegister(addr uint16, value uint16) (err error)

+ func (mc *ModbusClient) WriteRegisters(addr uint16, values []uint16) (err error)

+ func (mc *ModbusClient) WriteUint32(addr uint16, value uint32) (err error)

+ func (mc *ModbusClient) WriteUint32s(addr uint16, values []uint32) (err error)

+ func (mc *ModbusClient) WriteUint64(addr uint16, value uint64) (err error)

+ func (mc *ModbusClient) WriteUint64s(addr uint16, values []uint64) (err error)

+ type ModbusServer struct

+ func NewServer(conf *ServerConfiguration, reqHandler RequestHandler) (ms *ModbusServer, err error)

+ func (ms *ModbusServer) Start() (err error)

+ func (ms *ModbusServer) Stop() (err error)

+ type RegType uint

+ type RequestHandler interface

+ HandleCoils func(req *CoilsRequest) (res []bool, err error)

+ HandleDiscreteInputs func(req *DiscreteInputsRequest) (res []bool, err error)

+ HandleHoldingRegisters func(req *HoldingRegistersRequest) (res []uint16, err error)

+ HandleInputRegisters func(req *InputRegistersRequest) (res []uint16, err error)

+ type ServerConfiguration struct

+ Logger *log.Logger

+ MaxClients uint

+ TLSClientCAs *x509.CertPool

+ TLSServerCert *tls.Certificate

+ Timeout time.Duration

+ URL string

+ type WordOrder uint