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#!/usr/bin/env python
"""
Pymodbus Synchronous Server Example to showcase Device Information
--------------------------------------------------------------------------
This server demonstrates the use of Device Information to provide information
to clients about the device. This is part of the MODBUS specification, and
uses the MEI 0x2B 0x0E request / response. This example creates an otherwise
empty server.
"""
# --------------------------------------------------------------------------- #
# import the various server implementations
# --------------------------------------------------------------------------- #
from pymodbus.server.sync import StartTcpServer
from pymodbus.server.sync import StartUdpServer
from pymodbus.server.sync import StartSerialServer
from pymodbus.device import ModbusDeviceIdentification
from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext
from pymodbus.transaction import ModbusRtuFramer, ModbusBinaryFramer
# --------------------------------------------------------------------------- #
# import versions of libraries which we will use later on for the example
# --------------------------------------------------------------------------- #
from pymodbus import __version__ as pymodbus_version
from serial import __version__ as pyserial_version
# --------------------------------------------------------------------------- #
# configure the service logging
# --------------------------------------------------------------------------- #
import logging
FORMAT = ('%(asctime)-15s %(threadName)-15s'
' %(levelname)-8s %(module)-15s:%(lineno)-8s %(message)s')
logging.basicConfig(format=FORMAT)
log = logging.getLogger()
log.setLevel(logging.DEBUG)
def run_server():
# ----------------------------------------------------------------------- #
# initialize your data store
# ----------------------------------------------------------------------- #
store = ModbusSlaveContext()
context = ModbusServerContext(slaves=store, single=True)
# ----------------------------------------------------------------------- #
# initialize the server information
# ----------------------------------------------------------------------- #
# If you don't set this or any fields, they are defaulted to empty strings.
# ----------------------------------------------------------------------- #
identity = ModbusDeviceIdentification()
identity.VendorName = 'Pymodbus'
identity.ProductCode = 'PM'
identity.VendorUrl = 'http://github.com/riptideio/pymodbus/'
identity.ProductName = 'Pymodbus Server'
identity.ModelName = 'Pymodbus Server'
identity.MajorMinorRevision = '1.5'
# ----------------------------------------------------------------------- #
# Add an example which is long enough to force the ReadDeviceInformation
# request / response to require multiple responses to send back all of the
# information.
# ----------------------------------------------------------------------- #
identity[0x80] = "Lorem ipsum dolor sit amet, consectetur adipiscing " \
"elit. Vivamus rhoncus massa turpis, sit amet " \
"ultrices orci semper ut. Aliquam tristique sapien in " \
"lacus pharetra, in convallis nunc consectetur. Nunc " \
"velit elit, vehicula tempus tempus sed. "
# ----------------------------------------------------------------------- #
# Add an example with repeated object IDs. The MODBUS specification is
# entirely silent on whether or not this is allowed. In practice, this
# should be assumed to be contrary to the MODBUS specification and other
# clients (other than pymodbus) might behave differently when presented
# with an object ID occurring twice in the returned information.
#
# Use this at your discretion, and at the very least ensure that all
# objects which share a single object ID can fit together within a single
# ADU unit. In the case of Modbus RTU, this is about 240 bytes or so. In
# other words, when the spec says "An object is indivisible, therefore
# any object must have a size consistent with the size of transaction
# response", if you use repeated OIDs, apply that rule to the entire
# grouping of objects with the repeated OID.
# ----------------------------------------------------------------------- #
identity[0x81] = ['pymodbus {0}'.format(pymodbus_version),
'pyserial {0}'.format(pyserial_version)]
# ----------------------------------------------------------------------- #
# run the server you want
# ----------------------------------------------------------------------- #
# Tcp:
StartTcpServer(context, identity=identity, address=("localhost", 5020))
# TCP with different framer
# StartTcpServer(context, identity=identity,
# framer=ModbusRtuFramer, address=("0.0.0.0", 5020))
# Udp:
# StartUdpServer(context, identity=identity, address=("0.0.0.0", 5020))
# Ascii:
# StartSerialServer(context, identity=identity,
# port='/dev/ttyp0', timeout=1)
# RTU:
# StartSerialServer(context, framer=ModbusRtuFramer, identity=identity,
# port='/dev/ttyp0', timeout=.005, baudrate=9600)
# Binary
# StartSerialServer(context,
# identity=identity,
# framer=ModbusBinaryFramer,
# port='/dev/ttyp0',
# timeout=1)
if __name__ == "__main__":
run_server()
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