diff --git a/devices/SNMP.py b/devices/SNMP.py
new file mode 100644
index 0000000000000000000000000000000000000000..8b5d4a21c85cebbc562bd22baf5afec5e37b86d9
--- /dev/null
+++ b/devices/SNMP.py
@@ -0,0 +1,112 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of the PCC project
+#
+#
+#
+# Distributed under the terms of the APACHE license.
+# See LICENSE.txt for more info.
+
+""" SNMP Device for LOFAR2.0
+
+"""
+
+# PyTango imports
+from tango.server import run
+from tango.server import device_property
+from tango import AttrWriteType
+
+# Additional import
+from clients.SNMP_client import SNMP_client
+from util.attribute_wrapper import attribute_wrapper
+from util.hardware_device import hardware_device
+
+import numpy
+
+__all__ = ["SNMP", "main"]
+
+
+class SNMP(hardware_device):
+ """
+
+ **Properties:**
+
+ - Device Property
+ SNMP_community
+ - Type:'DevString'
+ SNMP_host
+ - Type:'DevULong'
+ SNMP_timeout
+ - Type:'DevDouble'
+ """
+
+ # -----------------
+ # Device Properties
+ # -----------------
+
+ SNMP_community = device_property(
+ dtype='DevString',
+ mandatory=True
+ )
+
+ SNMP_host = device_property(
+ dtype='DevString',
+ mandatory=True
+ )
+
+ SNMP_timeout = device_property(
+ dtype='DevDouble',
+ mandatory=True
+ )
+
+ # ----------
+ # Attributes
+ # ----------
+
+ sys_description_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.1.1.0"}, datatype=numpy.str_)
+ sys_objectID_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.1.2.0", "type": "OID"}, datatype=numpy.str_)
+ sys_uptime_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.1.3.0", "type": "TimeTicks"}, datatype=numpy.int64)
+ sys_name_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.1.5.0"}, datatype=numpy.str_)
+ ip_route_mask_127_0_0_1_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.4.21.1.11.127.0.0.1", "type": "IpAddress"}, datatype=numpy.str_)
+ TCP_active_open_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.6.5.0", "type": "Counter32"}, datatype=numpy.int64)
+
+ sys_contact_RW = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.1.4.0"}, datatype=numpy.str_, access=AttrWriteType.READ_WRITE)
+ sys_contact_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.1.4.0"}, datatype=numpy.str_)
+
+ TCP_Curr_estab_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.6.9.0", "type": "Gauge"}, datatype=numpy.int64)
+
+ # inferred spectrum
+ if_index_R = attribute_wrapper(comms_annotation={"oids": "1.3.6.1.2.1.2.2.1.1"}, dims=(10,), datatype=numpy.int64)
+
+
+ # --------
+ # overloaded functions
+ # --------
+ def configure_for_initialise(self):
+ """ user code here. is called when the state is set to STANDBY """
+
+ # set up the SNMP ua client
+ self.snmp_manager = SNMP_client(self.SNMP_community, self.SNMP_host, self.SNMP_timeout, self.Fault, self)
+
+ # map the attributes to the OPC ua comm client
+ for i in self.attr_list():
+ i.set_comm_client(self.snmp_manager)
+
+ self.snmp_manager.start()
+
+
+# --------
+# Commands
+# --------
+
+
+# ----------
+# Run server
+# ----------
+def main(args=None, **kwargs):
+ """Main function of the PCC module."""
+ return run((SNMP,), args=args, **kwargs)
+
+
+if __name__ == '__main__':
+ main()
diff --git a/devices/clients/SNMP_client.py b/devices/clients/SNMP_client.py
new file mode 100644
index 0000000000000000000000000000000000000000..6230386aa300efbf9bf23ac1491b6a10354cba2f
--- /dev/null
+++ b/devices/clients/SNMP_client.py
@@ -0,0 +1,160 @@
+from util.comms_client import CommClient
+import snmp
+import numpy
+import traceback
+
+__all__ = ["SNMP_client"]
+
+
+snmp_to_numpy_dict = {
+ snmp.types.INTEGER: numpy.int64,
+ snmp.types.TimeTicks: numpy.int64,
+ snmp.types.OCTET_STRING: numpy.str_,
+ snmp.types.OID: numpy.str_,
+ snmp.types.Counter32: numpy.int64,
+ snmp.types.Gauge32: numpy.int64,
+ snmp.types.IpAddress: numpy.str_,
+}
+
+snmp_types = {
+ "Integer": numpy.int64,
+ "Gauge": numpy.int64,
+ "TimeTick": numpy.int64,
+ "Counter32": numpy.int64,
+ "OctetString": numpy.str_,
+ "IpAddress": numpy.str_,
+ "OID": numpy.str_,
+}
+
+
+class SNMP_client(CommClient):
+ """
+ messages to keep a check on the connection. On connection failure, reconnects once.
+ """
+
+ def start(self):
+ super().start()
+
+ def __init__(self, community, host, timeout, fault_func, streams, try_interval=2):
+ """
+ Create the SNMP and connect() to it
+ """
+ super().__init__(fault_func, streams, try_interval)
+
+ self.community = community
+ self.host = host
+ self.manager = snmp.Manager(community=bytes(community, "utf8"))
+
+ # Explicitly connect
+ if not self.connect():
+ # hardware or infra is down -- needs fixing first
+ fault_func()
+ return
+
+ def connect(self):
+ """
+ Try to connect to the client
+ """
+ self.streams.debug_stream("Connecting to community: %s, host: %s", self.community, self.host)
+
+ self.connected = True
+ return True
+
+ def ping(self):
+ """
+ ping the client to make sure the connection with the client is still functional.
+ """
+ pass
+
+ def _setup_annotation(self, annotation):
+ """
+ This class's Implementation of the get_mapping function. returns the read and write functions
+ """
+
+ if isinstance(annotation, dict):
+ # check if required path inarg is present
+ if annotation.get('oids') is None:
+ ValueError("SNMP get attributes require an oid")
+ oids = annotation.get("oids") # required
+ else:
+ TypeError("SNMP attributes require a dict with oid(s)")
+ return
+
+ dtype = annotation.get('type', None)
+
+ return oids, dtype
+
+ def setup_value_conversion(self, attribute):
+ """
+ gives the client access to the attribute_wrapper object in order to access all data it could potentially need.
+ """
+
+ dim_x = attribute.dim_x
+ dim_y = attribute.dim_y
+ dtype = attribute.numpy_type
+
+ return dim_x, dim_y, dtype
+
+ def get_oids(self, x, y, in_oid):
+
+ if x == 0:
+ x = 1
+ if y == 0:
+ y = 1
+
+ nof_oids = x * y
+
+ if nof_oids == 1:
+ # is scalar
+ if type(in_oid) is str:
+ # for ease of handling put single oid in a 1 element list
+ in_oid = [in_oid]
+ return in_oid
+
+ elif type(in_oid) is list and len(in_oid) == nof_oids:
+ # already is an array and of the right length
+ return in_oid
+ elif type(in_oid) is list and len(in_oid) != nof_oids:
+ # already is an array but the wrong length. Unable to handle this
+ raise ValueError("SNMP oids need to either be a single value or an array the size of the attribute dimensions. got: {} expected: {}x{}={}".format(len(in_oid),x,y,x*y))
+ else:
+
+ return ["{}.{}".format(in_oid, i + 1) for i in range(nof_oids)]
+
+
+ def setup_attribute(self, annotation, attribute):
+ """
+ MANDATORY function: is used by the attribute wrapper to get read/write functions. must return the read and write functions
+ """
+
+ # process the annotation
+ oids, dtype = self._setup_annotation(annotation)
+
+ # get all the necessary data to set up the read/write functions from the attribute_wrapper
+ dim_x, dim_y, numpy_type = self.setup_value_conversion(attribute)
+ oids = self.get_oids(dim_x, dim_y, oids)
+
+ def _read_function():
+ vars = self.manager.get(self.host, *oids)
+ return [snmp_to_numpy_dict[type(i.value)](str(i.value)) for i in vars]
+
+ if dtype is not None:
+ def _write_function(value):
+ if len(oids) == 1 and type(value) != list:
+ value = [value]
+
+ for i in range(len(oids)):
+ self.manager.set(self.host, oids[i], snmp_types[dtype](value[i]))
+ else:
+ def _write_function(value):
+ if len(oids) == 1 and type(value) != list:
+ value = [value]
+
+ for i in range(len(oids)):
+ self.manager.set(self.host, oids[i], value[i])
+
+
+ # return the read/write functions
+ return _read_function, _write_function
+
+