Extend APCI services

changelog.md

@@ -22,6 +22,7 @@
 - Telegram: `group_address` renamed to `destination_address`, to prepare support for other APCI services and add `source_address`
 - Telegram: remove `Telegram.telegramtype` and replace with payload object derived from `xknx.telegram.apci.APCI`.
 - CEMIFrame: remove `CEMIFrame.cmd`, which can be derived from `CEMIFrame.payload`.
+- APCI: extend APCI services (e.g. `MemoryRead/Write/Response`, `PropertyRead/Write/Response`, etc).
 - Farewell Travis CI; Welcome Github Actions!
 - StateUpdater allow float values for `register_remote_value(tracker_options)` attribute.
 - Handle exceptions from received unsupported or not implemented KNXIP Service Type identifiers

examples/example_info.py

@@ -0,0 +1,65 @@
+"""Example on how to read mask version and properties from a KNX actor."""
+import asyncio
+import sys
+from typing import List
+
+from xknx import XKNX
+from xknx.core import PayloadReader
+from xknx.telegram import IndividualAddress
+from xknx.telegram.apci import (
+    DeviceDescriptorRead,
+    DeviceDescriptorResponse,
+    PropertyValueRead,
+    PropertyValueResponse,
+)
+
+
+async def main(argv: List[str]):
+    """Connect and read information from a KNX device. Requires a System B device."""
+    if len(argv) == 2:
+        address = IndividualAddress(argv[1])
+    else:
+        address = "1.1.1"
+
+    xknx = XKNX()
+    await xknx.start()
+
+    reader = PayloadReader(xknx, address)
+
+    # Read the mask version of the device (descriptor 0).
+    payload = await reader.send(
+        DeviceDescriptorRead(descriptor=0), response_class=DeviceDescriptorResponse
+    )
+    if payload is not None:
+        print("Mask version: %04x" % payload.value)
+
+    # Read the serial number of the device (object 0, property 11).
+    payload = await reader.send(
+        PropertyValueRead(object_index=0, property_id=11, count=1, start_index=1),
+        response_class=PropertyValueResponse,
+    )
+    if payload is not None:
+        print(
+            "Serial number: {:02x}{:02x}:{:02x}{:02x}{:02x}{:02x}".format(
+                payload.data[0],
+                payload.data[1],
+                payload.data[2],
+                payload.data[3],
+                payload.data[4],
+                payload.data[5],
+            )
+        )
+
+    # Check if the device is in programming mode (object 0, property 54).
+    payload = await reader.send(
+        PropertyValueRead(object_index=0, property_id=54, count=1, start_index=1),
+        response_class=PropertyValueResponse,
+    )
+    if payload is not None:
+        print("Programming mode: %s" % ("ON" if payload.data[0] else "OFF"))
+
+    await xknx.stop()
+
+
+if __name__ == "__main__":
+    asyncio.run(main(sys.argv))

examples/example_restart.py

@@ -0,0 +1,29 @@
+"""Example on how to connect to restart a KNX device."""
+import asyncio
+import sys
+from typing import List
+
+from xknx import XKNX
+from xknx.telegram import IndividualAddress, Telegram
+from xknx.telegram.apci import Restart
+
+
+async def main(argv: List[str]):
+    """Restart a KNX device."""
+    if len(argv) != 2:
+        print(f"{argv[0]}: missing target address.")
+        return 1
+
+    address = IndividualAddress(argv[1])
+
+    xknx = XKNX()
+    await xknx.start()
+
+    await xknx.telegrams.put(Telegram(address, payload=Restart()))
+    await asyncio.sleep(2)
+
+    await xknx.stop()
+
+
+if __name__ == "__main__":
+    asyncio.run(main(sys.argv))

examples/readme.md

@@ -26,4 +26,11 @@
 |[Sensor](./example_sensor.py)|Example for Sensor device|
 |[Switch](./example_switch.py)|Example for Switch device|
 |[Scene](./example_scene.py)|Example for switching a light on and off|
-|[Weather](./example_weather.py)|Example for Weather device and reading sensor data|
+|[Weather](./example_weather.py)|Example for Weather device and reading sensor data|
+
+## Low-level
+
+|Example|Description|
+|-|-|
+|[Info](./example_info.py)|Example on how to read device information such as serial and programming mode (depends on actor if supported)|
+|[Restart](./example_restart.py)|Example on how to restart an actor|

test/core_tests/payload_reader_test.py

@@ -0,0 +1,83 @@
+"""Unit test for payload reader."""
+import asyncio
+import unittest
+from unittest.mock import MagicMock, patch
+
+from xknx import XKNX
+from xknx.core import PayloadReader
+from xknx.telegram import IndividualAddress, Telegram, TelegramDirection
+from xknx.telegram.apci import MemoryRead, MemoryResponse
+
+
+class TestPayloadReader(unittest.TestCase):
+    """Test class for payload reader."""
+
+    def setUp(self):
+        """Set up test class."""
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.loop)
+
+    def tearDown(self):
+        """Tear down test class."""
+        self.loop.close()
+
+    def create_telegram_queue_mock(self, xknx: XKNX, response_telegram: Telegram):
+        """
+        Create a TelegramQueue mock that returns a specific response telegram.
+        """
+        xknx.telegram_queue = MagicMock()
+
+        def _register_telegram_received_cb(func):
+            self.loop.create_task(func(response_telegram))
+
+        xknx.telegram_queue.register_telegram_received_cb.side_effect = (
+            _register_telegram_received_cb
+        )
+
+    def test_payload_reader_send_success(self):
+        """Test payload reader: successful send."""
+        xknx = XKNX()
+
+        destination_address = IndividualAddress("1.2.3")
+        request_payload = MemoryRead(0xAABB, 3)
+        response_payload = MemoryResponse(0xAABB, 3, bytes([0x00, 0x11, 0x33]))
+
+        response_telegram = Telegram(
+            source_address=destination_address,
+            direction=TelegramDirection.INCOMING,
+            payload=response_payload,
+        )
+
+        self.create_telegram_queue_mock(xknx, response_telegram)
+
+        payload_reader = PayloadReader(xknx, destination_address)
+
+        payload = self.loop.run_until_complete(
+            payload_reader.send(request_payload, response_class=MemoryResponse)
+        )
+
+        # Response is received.
+        self.assertEqual(payload, response_payload)
+
+    @patch("logging.Logger.warning")
+    def test_payload_reader_send_timeout(self, logger_warning_mock):
+        """Test payload reader: timeout while waiting for response."""
+        xknx = XKNX()
+
+        destination_address = IndividualAddress("1.2.3")
+        request_payload = MemoryRead(0xAABB, 3)
+
+        payload_reader = PayloadReader(xknx, destination_address, timeout_in_seconds=0)
+
+        payload = self.loop.run_until_complete(
+            payload_reader.send(request_payload, response_class=MemoryResponse)
+        )
+
+        # No response received.
+        self.assertEqual(payload, None)
+        # Warning was logged.
+        logger_warning_mock.assert_called_once_with(
+            "Error: KNX bus did not respond in time (%s secs) to payload request for: %s",
+            0.0,
+            IndividualAddress("1.2.3"),
+        )

test/io_tests/tunnel_test.py

@@ -48,18 +48,8 @@ def test_tunnel_request_received(self, send_ack_mock):
         send_ack_mock.assert_called_once_with(0x02, 0x21)
 
     @patch("xknx.io.Tunnel._send_tunnelling_ack")
-    def test_tunnel_request_received_unsupported_frames(self, send_ack_mock):
+    def test_tunnel_request_received_cemi_too_small(self, send_ack_mock):
         """Test Tunnel sending ACK for unsupported frames."""
-        # LDataInd APciPhysAddrRead from 0.0.1 to 0/0/0 broadcast - ETS scan for devices in programming mode
-        # <UnsupportedCEMIMessage description="APCI not supported: 0b0100000000 in CEMI: 2900b0d000010000010100" />
-        # communication_channel_id: 0x02   sequence_counter: 0x4f
-        raw = bytes.fromhex("0610 0420 0015 04 02 4f 00 2900b0d000010000010100")
-
-        self.tunnel.udp_client.data_received_callback(raw)
-        self.tg_received_mock.assert_not_called()
-        send_ack_mock.assert_called_once_with(0x02, 0x4F)
-        send_ack_mock.reset_mock()
-
         # LDataInd T_Connect from 1.0.250 to 1.0.255 (xknx tunnel endpoint) - ETS Line-Scan
         # <UnsupportedCEMIMessage description="CEMI too small. Length: 10; CEMI: 2900b06010fa10ff0080" />
         # communication_channel_id: 0x02   sequence_counter: 0x81
@@ -68,3 +58,15 @@ def test_tunnel_request_received_unsupported_frames(self, send_ack_mock):
         self.tunnel.udp_client.data_received_callback(raw)
         self.tg_received_mock.assert_not_called()
         send_ack_mock.assert_called_once_with(0x02, 0x81)
+
+    @patch("xknx.io.Tunnel._send_tunnelling_ack")
+    def test_tunnel_request_received_apci_unsupported(self, send_ack_mock):
+        """Test Tunnel sending ACK for unsupported frames."""
+        # LDataInd Unsupported Extended APCI from 0.0.1 to 0/0/0 broadcast
+        # <UnsupportedCEMIMessage description="APCI not supported: 0b1111111000 in CEMI: 2900b0d0000100000103f8" />
+        # communication_channel_id: 0x02   sequence_counter: 0x4f
+        raw = bytes.fromhex("0610 0420 0015 04 02 4f 00 2900b0d0000100000103f8")
+
+        self.tunnel.udp_client.data_received_callback(raw)
+        self.tg_received_mock.assert_not_called()
+        send_ack_mock.assert_called_once_with(0x02, 0x4F)

test/knxip_tests/cemi_frame_test.py

@@ -50,7 +50,7 @@ def test_valid_command(frame):
 
 
 def test_invalid_tpci_apci(frame):
-    """Test for invalid APCICommand"""
+    """Test for invalid APCIService"""
     with raises(UnsupportedCEMIMessage, match=r".*APCI not supported: .*"):
         frame.from_knx_data_link_layer(get_data(0x29, 0, 0, 0, 0, 1, 0xFFC0, []))