Pymodbus REPL

Dependencies

Depends on prompt_toolkit and click

Install dependencies

$ pip install click prompt_toolkit --upgarde

Or Install pymodbus with repl support

$ pip install pymodbus[repl] --upgrade

Usage Instructions

RTU and TCP are supported as of now

bash-3.2$ pymodbus.console
Usage: pymodbus.console [OPTIONS] COMMAND [ARGS]...

Options:
  --version       Show the version and exit.
  --verbose       Verbose logs
  --support-diag  Support Diagnostic messages
  --help          Show this message and exit.

Commands:
  serial
  tcp

TCP Options

bash-3.2$ pymodbus.console tcp --help
Usage: pymodbus.console tcp [OPTIONS]

Options:
  --host TEXT     Modbus TCP IP
  --port INTEGER  Modbus TCP port
  --help          Show this message and exit.



SERIAL Options

bash-3.2$ pymodbus.console serial --help
Usage: pymodbus.console serial [OPTIONS]

Options:
  --method TEXT          Modbus Serial Mode (rtu/ascii)
  --port TEXT            Modbus RTU port
  --baudrate INTEGER     Modbus RTU serial baudrate to use. Defaults to 9600
  --bytesize [5|6|7|8]   Modbus RTU serial Number of data bits. Possible
                         values: FIVEBITS, SIXBITS, SEVENBITS, EIGHTBITS.
                         Defaults to 8
  --parity [N|E|O|M|S]   Modbus RTU serial parity.  Enable parity checking.
                         Possible values: PARITY_NONE, PARITY_EVEN, PARITY_ODD
                         PARITY_MARK, PARITY_SPACE. Default to 'N'
  --stopbits [1|1.5|2]   Modbus RTU serial stop bits. Number of stop bits.
                         Possible values: STOPBITS_ONE,
                         STOPBITS_ONE_POINT_FIVE, STOPBITS_TWO. Default to '1'
  --xonxoff INTEGER      Modbus RTU serial xonxoff.  Enable software flow
                         control.Defaults to 0
  --rtscts INTEGER       Modbus RTU serial rtscts. Enable hardware (RTS/CTS)
                         flow control. Defaults to 0
  --dsrdtr INTEGER       Modbus RTU serial dsrdtr. Enable hardware (DSR/DTR)
                         flow control. Defaults to 0
  --timeout FLOAT        Modbus RTU serial read timeout. Defaults to 0.025 sec
  --write-timeout FLOAT  Modbus RTU serial write timeout. Defaults to 2 sec
  --help                 Show this message and exit.

To view all available commands type help

TCP

$ pymodbus.console tcp --host 192.168.128.126 --port 5020

> help
Available commands:
client.change_ascii_input_delimiter          Diagnostic sub command, Change message delimiter for future requests.
client.clear_counters                        Diagnostic sub command, Clear all counters and diag registers.
client.clear_overrun_count                   Diagnostic sub command, Clear over run counter.
client.close                                 Closes the underlying socket connection
client.connect                               Connect to the modbus tcp server
client.debug_enabled                         Returns a boolean indicating if debug is enabled.
client.force_listen_only_mode                Diagnostic sub command, Forces the addressed remote device to         its Listen Only Mode.
client.get_clear_modbus_plus                 Diagnostic sub command, Get or clear stats of remote          modbus plus device.
client.get_com_event_counter                 Read  status word and an event count from the remote device's         communication event counter.
client.get_com_event_log                     Read  status word, event count, message count, and a field of event bytes from the remote device.
client.host                                  Read Only!
client.idle_time                             Bus Idle Time to initiate next transaction
client.is_socket_open                        Check whether the underlying socket/serial is open or not.
client.last_frame_end                        Read Only!
client.mask_write_register                   Mask content of holding register at `address`          with `and_mask` and `or_mask`.
client.port                                  Read Only!
client.read_coils                            Reads `count` coils from a given slave starting at `address`.
client.read_device_information               Read the identification and additional information of remote slave.
client.read_discrete_inputs                  Reads `count` number of discrete inputs starting at offset `address`.
client.read_exception_status                 Read the contents of eight Exception Status outputs in a remote          device.
client.read_holding_registers                Read `count` number of holding registers starting at `address`.
client.read_input_registers                  Read `count` number of input registers starting at `address`.
client.readwrite_registers                   Read `read_count` number of holding registers starting at         `read_address`  and write `write_registers`         starting at `write_address`.
client.report_slave_id                       Report information about remote slave ID.
client.restart_comm_option                   Diagnostic sub command, initialize and restart remote devices serial         interface and clear all of its communications event counters .
client.return_bus_com_error_count            Diagnostic sub command, Return count of CRC errors         received by remote slave.
client.return_bus_exception_error_count      Diagnostic sub command, Return count of Modbus exceptions         returned by remote slave.
client.return_bus_message_count              Diagnostic sub command, Return count of message detected on bus          by remote slave.
client.return_diagnostic_register            Diagnostic sub command, Read 16-bit diagnostic register.
client.return_iop_overrun_count              Diagnostic sub command, Return count of iop overrun errors         by remote slave.
client.return_query_data                     Diagnostic sub command , Loop back data sent in response.
client.return_slave_bus_char_overrun_count   Diagnostic sub command, Return count of messages not handled          by remote slave due to character overrun condition.
client.return_slave_busy_count               Diagnostic sub command, Return count of server busy exceptions sent          by remote slave.
client.return_slave_message_count            Diagnostic sub command, Return count of messages addressed to         remote slave.
client.return_slave_no_ack_count             Diagnostic sub command, Return count of NO ACK exceptions sent          by remote slave.
client.return_slave_no_response_count        Diagnostic sub command, Return count of No responses  by remote slave.
client.silent_interval                       Read Only!
client.state                                 Read Only!
client.timeout                               Read Only!
client.write_coil                            Write `value` to coil at `address`.
client.write_coils                           Write `value` to coil at `address`.
client.write_register                        Write `value` to register at `address`.
client.write_registers                       Write list of `values` to registers starting at `address`.

SERIAL

$ pymodbus.console serial --port /dev/ttyUSB0 --baudrate 19200 --timeout 2
> help
Available commands:
client.baudrate                              Read Only!
client.bytesize                              Read Only!
client.change_ascii_input_delimiter          Diagnostic sub command, Change message delimiter for future requests.
client.clear_counters                        Diagnostic sub command, Clear all counters and diag registers.
client.clear_overrun_count                   Diagnostic sub command, Clear over run counter.
client.close                                 Closes the underlying socket connection
client.connect                               Connect to the modbus serial server
client.debug_enabled                         Returns a boolean indicating if debug is enabled.
client.force_listen_only_mode                Diagnostic sub command, Forces the addressed remote device to         its Listen Only Mode.
client.get_baudrate                          Serial Port baudrate.
client.get_bytesize                          Number of data bits.
client.get_clear_modbus_plus                 Diagnostic sub command, Get or clear stats of remote          modbus plus device.
client.get_com_event_counter                 Read  status word and an event count from the remote device's         communication event counter.
client.get_com_event_log                     Read  status word, event count, message count, and a field of event bytes from the remote device.
client.get_parity                            Enable Parity Checking.
client.get_port                              Serial Port.
client.get_serial_settings                   Gets Current Serial port settings.
client.get_stopbits                          Number of stop bits.
client.get_timeout                           Serial Port Read timeout.
client.idle_time                             Bus Idle Time to initiate next transaction
client.inter_char_timeout                    Read Only!
client.is_socket_open                        c l i e n t . i s   s o c k e t   o p e n
client.mask_write_register                   Mask content of holding register at `address`          with `and_mask` and `or_mask`.
client.method                                Read Only!
client.parity                                Read Only!
client.port                                  Read Only!
client.read_coils                            Reads `count` coils from a given slave starting at `address`.
client.read_device_information               Read the identification and additional information of remote slave.
client.read_discrete_inputs                  Reads `count` number of discrete inputs starting at offset `address`.
client.read_exception_status                 Read the contents of eight Exception Status outputs in a remote          device.
client.read_holding_registers                Read `count` number of holding registers starting at `address`.
client.read_input_registers                  Read `count` number of input registers starting at `address`.
client.readwrite_registers                   Read `read_count` number of holding registers starting at         `read_address`  and write `write_registers`         starting at `write_address`.
client.report_slave_id                       Report information about remote slave ID.
client.restart_comm_option                   Diagnostic sub command, initialize and restart remote devices serial         interface and clear all of its communications event counters .
client.return_bus_com_error_count            Diagnostic sub command, Return count of CRC errors         received by remote slave.
client.return_bus_exception_error_count      Diagnostic sub command, Return count of Modbus exceptions         returned by remote slave.
client.return_bus_message_count              Diagnostic sub command, Return count of message detected on bus          by remote slave.
client.return_diagnostic_register            Diagnostic sub command, Read 16-bit diagnostic register.
client.return_iop_overrun_count              Diagnostic sub command, Return count of iop overrun errors         by remote slave.
client.return_query_data                     Diagnostic sub command , Loop back data sent in response.
client.return_slave_bus_char_overrun_count   Diagnostic sub command, Return count of messages not handled          by remote slave due to character overrun condition.
client.return_slave_busy_count               Diagnostic sub command, Return count of server busy exceptions sent          by remote slave.
client.return_slave_message_count            Diagnostic sub command, Return count of messages addressed to         remote slave.
client.return_slave_no_ack_count             Diagnostic sub command, Return count of NO ACK exceptions sent          by remote slave.
client.return_slave_no_response_count        Diagnostic sub command, Return count of No responses  by remote slave.
client.set_baudrate                          Baudrate setter.
client.set_bytesize                          Byte size setter.
client.set_parity                            Parity Setter.
client.set_port                              Serial Port setter.
client.set_stopbits                          Stop bit setter.
client.set_timeout                           Read timeout setter.
client.silent_interval                       Read Only!
client.state                                 Read Only!
client.stopbits                              Read Only!
client.timeout                               Read Only!
client.write_coil                            Write `value` to coil at `address`.
client.write_coils                           Write `value` to coil at `address`.
client.write_register                        Write `value` to register at `address`.
client.write_registers                       Write list of `values` to registers starting at `address`.
result.decode                                Decode the register response to known formatters.
result.raw                                   Return raw result dict.

Every command has auto suggetion on the arguments supported , supply arg and value are to be supplied in arg=val format.


> client.read_holding_registers count=4 address=9 unit=1
{
    "registers": [
        60497,
        47134,
        34091,
        15424
    ]
}

The last result could be accessed with result.raw command

> result.raw
{
    "registers": [
        15626,
        55203,
        28733,
        18368
    ]
}

For Holding and Input register reads, the decoded value could be viewed with result.decode

> result.decode word_order=little byte_order=little formatters=float64
28.17

>

Client settings could be retrieved and altered as well.

> # For serial settings

> # Check the serial mode
> client.method
"rtu"

> client.get_serial_settings
{
    "t1.5": 0.00171875,
    "baudrate": 9600,
    "read timeout": 0.5,
    "port": "/dev/ptyp0",
    "t3.5": 0.00401,
    "bytesize": 8,
    "parity": "N",
    "stopbits": 1.0
}
> client.set_timeout value=1
null

> client.get_timeout
1.0

> client.get_serial_settings
{
    "t1.5": 0.00171875,
    "baudrate": 9600,
    "read timeout": 1.0,
    "port": "/dev/ptyp0",
    "t3.5": 0.00401,
    "bytesize": 8,
    "parity": "N",
    "stopbits": 1.0
}

DEMO

asciicast asciicast