diff --git a/ponsim_onu/ponsim_onu.py b/ponsim_onu/ponsim_onu.py
new file mode 100644
index 0000000..0987147
--- /dev/null
+++ b/ponsim_onu/ponsim_onu.py
@@ -0,0 +1,514 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Represents an ONU device
+"""
+
+from uuid import uuid4
+
+import arrow
+import structlog
+from google.protobuf.json_format import MessageToDict
+from google.protobuf.message import Message
+from simplejson import dumps
+from twisted.internet.defer import DeferredQueue, inlineCallbacks, \
+    returnValue, Deferred
+from twisted.internet.task import LoopingCall
+
+from pyvoltha.common.utils.asleep import asleep
+from pyvoltha.adapters.iadapter import OnuAdapter
+from pyvoltha.adapters.kafka.kafka_proxy import get_kafka_proxy
+from voltha_protos.common_pb2 import OperStatus, ConnectStatus, AdminState
+from voltha_protos.inter_container_pb2 import PortCapability, \
+    InterAdapterMessageType, InterAdapterResponseBody
+from voltha_protos.device_pb2 import Port, PmConfig, PmConfigs
+from voltha_protos.events_pb2 import KpiEvent, KpiEventType, MetricValuePairs
+from voltha_protos.logical_device_pb2 import LogicalPort
+from voltha_protos.openflow_13_pb2 import OFPPS_LIVE, OFPPF_FIBER, \
+    OFPPF_1GB_FD
+from voltha_protos.openflow_13_pb2 import ofp_port
+from voltha_protos.ponsim_pb2 import FlowTable, PonSimMetricsRequest, PonSimMetrics
+
+log = structlog.get_logger()
+
+
+def mac_str_to_tuple(mac):
+    return tuple(int(d, 16) for d in mac.split(':'))
+
+
+class AdapterPmMetrics:
+    def __init__(self, device):
+        self.pm_names = {'tx_64_pkts', 'tx_65_127_pkts', 'tx_128_255_pkts',
+                         'tx_256_511_pkts', 'tx_512_1023_pkts',
+                         'tx_1024_1518_pkts', 'tx_1519_9k_pkts',
+                         'rx_64_pkts', 'rx_65_127_pkts',
+                         'rx_128_255_pkts', 'rx_256_511_pkts',
+                         'rx_512_1023_pkts', 'rx_1024_1518_pkts',
+                         'rx_1519_9k_pkts'}
+        self.device = device
+        self.id = device.id
+        self.name = 'ponsim_onu'
+        self.default_freq = 150
+        self.grouped = False
+        self.freq_override = False
+        self.pm_metrics = None
+        self.pon_metrics_config = dict()
+        self.uni_metrics_config = dict()
+        self.lc = None
+        for m in self.pm_names:
+            self.pon_metrics_config[m] = PmConfig(name=m,
+                                                  type=PmConfig.COUNTER,
+                                                  enabled=True)
+            self.uni_metrics_config[m] = PmConfig(name=m,
+                                                  type=PmConfig.COUNTER,
+                                                  enabled=True)
+
+    def update(self, pm_config):
+        if self.default_freq != pm_config.default_freq:
+            # Update the callback to the new frequency.
+            self.default_freq = pm_config.default_freq
+            self.lc.stop()
+            self.lc.start(interval=self.default_freq / 10)
+        for m in pm_config.metrics:
+            self.pon_metrics_config[m.name].enabled = m.enabled
+            self.uni_metrics_config[m.name].enabled = m.enabled
+
+    def make_proto(self):
+        pm_config = PmConfigs(
+            id=self.id,
+            default_freq=self.default_freq,
+            grouped=False,
+            freq_override=False)
+        for m in sorted(self.pon_metrics_config):
+            pm = self.pon_metrics_config[m]  # Either will do they're the same
+            pm_config.metrics.extend([PmConfig(name=pm.name,
+                                               type=pm.type,
+                                               enabled=pm.enabled)])
+        return pm_config
+
+    def extract_metrics(self, stats):
+        rtrn_port_metrics = dict()
+        rtrn_port_metrics['pon'] = self.extract_pon_metrics(stats)
+        rtrn_port_metrics['uni'] = self.extract_uni_metrics(stats)
+        return rtrn_port_metrics
+
+    def extract_pon_metrics(self, stats):
+        rtrn_pon_metrics = dict()
+        for m in stats.metrics:
+            if m.port_name == "pon":
+                for p in m.packets:
+                    if self.pon_metrics_config[p.name].enabled:
+                        rtrn_pon_metrics[p.name] = p.value
+                return rtrn_pon_metrics
+
+    def extract_uni_metrics(self, stats):
+        rtrn_pon_metrics = dict()
+        for m in stats.metrics:
+            if m.port_name == "uni":
+                for p in m.packets:
+                    if self.pon_metrics_config[p.name].enabled:
+                        rtrn_pon_metrics[p.name] = p.value
+                return rtrn_pon_metrics
+
+    def start_collector(self, callback):
+        log.info("starting-pm-collection", device_name=self.name,
+                 device_id=self.device.id)
+        prefix = 'voltha.{}.{}'.format(self.name, self.device.id)
+        self.lc = LoopingCall(callback, self.device.id, prefix)
+        self.lc.start(interval=self.default_freq / 10)
+
+    def stop_collector(self):
+        log.info("stopping-pm-collection", device_name=self.name,
+                 device_id=self.device.id)
+        self.lc.stop()
+
+
+class PonSimOnuAdapter(OnuAdapter):
+    def __init__(self, core_proxy, adapter_proxy, config):
+        # DeviceType of ONU should be same as VENDOR ID of ONU Serial Number
+        # as specified by standard
+        # requires for identifying correct adapter or ranged ONU
+        super(PonSimOnuAdapter, self).__init__(core_proxy=core_proxy,
+                                               adapter_proxy=adapter_proxy,
+                                               config=config,
+                                               device_handler_class=PonSimOnuHandler,
+                                               name='ponsim_onu',
+                                               vendor='Voltha project',
+                                               version='0.4',
+                                               device_type='ponsim_onu',
+                                               vendor_id='PSMO',
+                                               accepts_bulk_flow_update=True,
+                                               accepts_add_remove_flow_updates=False)
+
+
+class PonSimOnuHandler(object):
+    def __init__(self, adapter, device_id):
+        self.adapter = adapter
+        self.core_proxy = adapter.core_proxy
+        self.adapter_proxy = adapter.adapter_proxy
+        self.device_id = device_id
+        self.device_parent_id = None
+        self.log = structlog.get_logger(device_id=device_id)
+        self.incoming_messages = DeferredQueue()
+        self.inter_adapter_message_deferred_map = {}
+        self.proxy_address = None
+        # reference of uni_port is required when re-enabling the device if
+        # it was disabled previously
+        self.uni_port = None
+        self.pon_port = None
+
+    def _to_string(self, unicode_str):
+        if unicode_str is not None:
+            if type(unicode_str) == unicode:
+                return unicode_str.encode('ascii', 'ignore')
+            else:
+                return unicode_str
+        else:
+            return ""
+
+    def receive_message(self, msg):
+        trns_id = self._to_string(msg.header.id)
+        if trns_id in self.inter_adapter_message_deferred_map:
+            self.inter_adapter_message_deferred_map[trns_id].callback(msg)
+            # self.incoming_messages.put(msg)
+
+    @inlineCallbacks
+    def activate(self, device):
+        self.log.info('activating')
+
+        self.device_parent_id = device.parent_id
+        self.proxy_address = device.proxy_address
+
+        # populate device info
+        device.root = False
+        device.vendor = 'ponsim'
+        device.model = 'n/a'
+        device.serial_number = device.serial_number
+        device.mac_address = "AA:BB:CC:DD:E0:00"
+        yield self.core_proxy.device_update(device)
+
+        # Now set the initial PM configuration for this device
+        self.pm_metrics = AdapterPmMetrics(device)
+        pm_config = self.pm_metrics.make_proto()
+        log.info("initial-pm-config", pm_config=pm_config)
+        yield self.core_proxy.device_pm_config_update(pm_config, init=True)
+
+        # Use the channel Id, assigned by the parent device to me, as the port number
+        uni_port = 2
+        if device.proxy_address is not None:
+            if device.proxy_address.channel_id != 0:
+                uni_port =  device.proxy_address.channel_id
+
+        # register physical ports
+        self.uni_port = Port(
+            port_no=uni_port,
+            label="uni-" + str(uni_port),
+            type=Port.ETHERNET_UNI,
+            admin_state=AdminState.ENABLED,
+            oper_status=OperStatus.ACTIVE
+        )
+        self.pon_port = Port(
+            port_no=1,
+            label='pon-1',
+            type=Port.PON_ONU,
+            admin_state=AdminState.ENABLED,
+            oper_status=OperStatus.ACTIVE,
+            peers=[
+                Port.PeerPort(
+                    device_id=device.parent_id,
+                    port_no=device.parent_port_no
+                )
+            ]
+        )
+        yield self.core_proxy.port_created(device.id, self.uni_port)
+        yield self.core_proxy.port_created(device.id, self.pon_port)
+
+        yield self.core_proxy.device_state_update(device.id,
+                                                  connect_status=ConnectStatus.REACHABLE,
+                                                  oper_status=OperStatus.ACTIVE)
+
+        # Start collecting stats from the device after a brief pause
+        self.start_kpi_collection(device.id)
+
+    # TODO: Return only port specific info
+    def get_ofp_port_info(self, device, port_no):
+        # Since the adapter created the device port then it has the reference
+        #  of the port to
+        # return the capability.   TODO:  Do a lookup on the UNI port number
+        # and return the
+        # appropriate attributes
+        self.log.info('get_ofp_port_info', port_no=port_no, device_id=device.id)
+        cap = OFPPF_1GB_FD | OFPPF_FIBER
+        return PortCapability(
+            port=LogicalPort(
+                ofp_port=ofp_port(
+                    hw_addr=mac_str_to_tuple('AA:BB:CC:DD:E0:%02x' % port_no),
+                    config=0,
+                    state=OFPPS_LIVE,
+                    curr=cap,
+                    advertised=cap,
+                    peer=cap,
+                    curr_speed=OFPPF_1GB_FD,
+                    max_speed=OFPPF_1GB_FD
+                ),
+                device_id=device.id,
+                device_port_no=port_no
+            )
+        )
+
+    @inlineCallbacks
+    def _get_uni_port(self):
+        ports = yield self.core_proxy.get_ports(self.device_id,
+                                                Port.ETHERNET_UNI)
+        returnValue(ports)
+
+    @inlineCallbacks
+    def _get_pon_port(self):
+        ports = yield self.core_proxy.get_ports(self.device_id, Port.PON_ONU)
+        returnValue(ports)
+
+    def reconcile(self, device):
+        self.log.info('reconciling-ONU-device-starts')
+        # TODO: complete code
+
+    @inlineCallbacks
+    def update_flow_table(self, flows):
+        trnsId = None
+        try:
+            self.log.info('update_flow_table', flows=flows)
+            # we need to proxy through the OLT to get to the ONU
+
+            fb = FlowTable(
+                port=self.proxy_address.channel_id,
+                flows=flows
+            )
+
+            # Create a deferred to wait for the result as well as a transid
+            wait_for_result = Deferred()
+            trnsId = uuid4().hex
+            self.inter_adapter_message_deferred_map[
+                self._to_string(trnsId)] = wait_for_result
+
+            # Sends the request via proxy and wait for an ACK
+            yield self.adapter_proxy.send_inter_adapter_message(
+                msg=fb,
+                type=InterAdapterMessageType.FLOW_REQUEST,
+                from_adapter=self.adapter.name,
+                to_adapter=self.proxy_address.device_type,
+                to_device_id=self.device_id,
+                proxy_device_id=self.proxy_address.device_id,
+                message_id=trnsId
+            )
+            # Wait for the full response from the proxied adapter
+            res = yield wait_for_result
+            if res.header.type == InterAdapterMessageType.FLOW_RESPONSE:
+                body = InterAdapterResponseBody()
+                res.body.Unpack(body)
+                self.log.info('response-received', result=body.status)
+        except Exception as e:
+            self.log.exception("update-flow-error", e=e)
+        finally:
+            if trnsId in self.inter_adapter_message_deferred_map:
+                del self.inter_adapter_message_deferred_map[trnsId]
+
+    def process_inter_adapter_message(self, msg):
+        # We expect only responses on the ONU side
+        self.log.info('process-inter-adapter-message', msg=msg)
+        self.receive_message(msg)
+
+    def remove_from_flow_table(self, flows):
+        self.log.debug('remove-from-flow-table', flows=flows)
+        # TODO: Update PONSIM code to accept incremental flow changes.
+        # Once completed, the accepts_add_remove_flow_updates for this
+        # device type can be set to True
+
+    def add_to_flow_table(self, flows):
+        self.log.debug('add-to-flow-table', flows=flows)
+        # TODO: Update PONSIM code to accept incremental flow changes
+        # Once completed, the accepts_add_remove_flow_updates for this
+        # device type can be set to True
+
+    @inlineCallbacks
+    def reboot(self):
+        self.log.info('rebooting', device_id=self.device_id)
+
+        # Update the connect status to UNREACHABLE
+        yield self.core_proxy.device_state_update(self.device_id,
+                                                  connect_status=ConnectStatus.UNREACHABLE)
+
+        # Sleep 10 secs, simulating a reboot
+        # TODO: send alert and clear alert after the reboot
+        yield asleep(10)
+
+        # Change the connection status back to REACHABLE.  With a
+        # real ONU the connection state must be the actual state
+        yield self.core_proxy.device_state_update(self.device_id,
+                                                  connect_status=ConnectStatus.REACHABLE)
+
+        self.log.info('rebooted', device_id=self.device_id)
+
+    def self_test_device(self, device):
+        """
+        This is called to Self a device based on a NBI call.
+        :param device: A Voltha.Device object.
+        :return: Will return result of self test
+        """
+        log.info('self-test-device', device=device.id)
+        raise NotImplementedError()
+
+    @inlineCallbacks
+    def disable(self):
+        self.log.info('disabling', device_id=self.device_id)
+
+        # Update the device operational status to UNKNOWN
+        yield self.core_proxy.device_state_update(self.device_id,
+                                                  oper_status=OperStatus.UNKNOWN,
+                                                  connect_status=ConnectStatus.UNREACHABLE)
+
+        self.stop_kpi_collection()
+
+        # TODO:
+        # 1) Remove all flows from the device
+        # 2) Remove the device from ponsim
+        self.log.info('disabled', device_id=self.device_id)
+
+    @inlineCallbacks
+    def reenable(self):
+        self.log.info('re-enabling', device_id=self.device_id)
+        try:
+
+            # Refresh the port reference - we only use one port for now
+            ports = yield self._get_uni_port()
+            self.log.info('re-enabling-uni-ports', ports=ports)
+            if ports.items:
+                self.uni_port = ports.items[0]
+
+            ports = yield self._get_pon_port()
+            self.log.info('re-enabling-pon-ports', ports=ports)
+            if ports.items:
+                self.pon_port = ports.items[0]
+
+            # Update the state of the UNI port
+            yield self.core_proxy.port_state_update(self.device_id,
+                                                    port_type=Port.ETHERNET_UNI,
+                                                    port_no=self.uni_port.port_no,
+                                                    oper_status=OperStatus.ACTIVE)
+
+            # Update the state of the PON port
+            yield self.core_proxy.port_state_update(self.device_id,
+                                                    port_type=Port.PON_ONU,
+                                                    port_no=self.pon_port.port_no,
+                                                    oper_status=OperStatus.ACTIVE)
+
+            yield self.core_proxy.device_state_update(self.device_id,
+                                                      oper_status=OperStatus.ACTIVE,
+                                                      connect_status=ConnectStatus.REACHABLE)
+
+            self.start_kpi_collection(self.device_id)
+
+            self.log.info('re-enabled', device_id=self.device_id)
+        except Exception, e:
+            self.log.exception('error-reenabling', e=e)
+
+    def delete(self):
+        self.log.info('deleting', device_id=self.device_id)
+
+        # TODO:
+        # 1) Remove all flows from the device
+        # 2) Remove the device from ponsim
+
+        self.log.info('deleted', device_id=self.device_id)
+
+    def start_kpi_collection(self, device_id):
+        kafka_cluster_proxy = get_kafka_proxy()
+
+        @inlineCallbacks
+        def _collect(device_id, prefix):
+            try:
+                self.log.debug("pm-collection-interval")
+                # Proxy a message to ponsim_olt. The OLT will then query the ONU
+                # for statistics. The reply will
+                # arrive proxied back to us in self.receive_message().
+                msg = PonSimMetricsRequest(port=self.proxy_address.channel_id)
+
+                # Create a deferred to wait for the result as well as a transid
+                wait_for_result = Deferred()
+                trnsId = uuid4().hex
+                self.inter_adapter_message_deferred_map[
+                    self._to_string(trnsId)] = wait_for_result
+
+                # Sends the request via proxy and wait for an ACK
+                yield self.adapter_proxy.send_inter_adapter_message(
+                    msg=msg,
+                    type=InterAdapterMessageType.METRICS_REQUEST,
+                    from_adapter=self.adapter.name,
+                    to_adapter=self.proxy_address.device_type,
+                    to_device_id=self.device_id,
+                    proxy_device_id=self.proxy_address.device_id,
+                    message_id=trnsId
+                )
+                # Wait for the full response from the proxied adapter
+                res = yield wait_for_result
+                # Remove the transaction from the transaction map
+                del self.inter_adapter_message_deferred_map[self._to_string(trnsId)]
+
+                # Message is a reply to an ONU statistics request. Push it out to
+                #  Kafka via adapter.submit_kpis().
+                if res.header.type == InterAdapterMessageType.METRICS_RESPONSE:
+                    msg = InterAdapterResponseBody()
+                    res.body.Unpack(msg)
+                    self.log.debug('metrics-response-received', result=msg.status)
+                    if self.pm_metrics:
+                        self.log.debug('Handling incoming ONU metrics')
+                        response = PonSimMetrics()
+                        msg.body.Unpack(response)
+                        port_metrics = self.pm_metrics.extract_metrics(response)
+                        try:
+                            ts = arrow.utcnow().timestamp
+                            kpi_event = KpiEvent(
+                                type=KpiEventType.slice,
+                                ts=ts,
+                                prefixes={
+                                    # OLT NNI port
+                                    prefix + '.uni': MetricValuePairs(
+                                        metrics=port_metrics['uni']),
+                                    # OLT PON port
+                                    prefix + '.pon': MetricValuePairs(
+                                        metrics=port_metrics['pon'])
+                                }
+                            )
+
+                            self.log.debug(
+                                'Submitting KPI for incoming ONU mnetrics')
+
+                            # Step 3: submit directly to the kafka bus
+                            if kafka_cluster_proxy:
+                                if isinstance(kpi_event, Message):
+                                    kpi_event = dumps(
+                                        MessageToDict(kpi_event, True, True))
+                                kafka_cluster_proxy.send_message("voltha.kpis",
+                                                                 kpi_event)
+
+                        except Exception as e:
+                            log.exception('failed-to-submit-kpis', e=e)
+            except Exception as e:
+                log.exception('failed-to-collect-metrics', e=e)
+
+        self.pm_metrics.start_collector(_collect)
+
+    def stop_kpi_collection(self):
+        self.pm_metrics.stop_collector()