[Python] How to use BAC0 to read from Bacnet.Room.Simulator

I installed Yabe (Yet Another BACnet Simulator) and Room.Control.Simulator with that. Now I want to write a Python program to read the temperature values. This is the first step to better understand how to use the BAC0 library and the BACnet protocol.



I tried this code to find the simulated device:

import asyncio
import BAC0


async def main():
bacnet = BAC0.start(ip="10.227.6.203", mask=24, port=47808)
bacnet.discover()
devices = await bacnet.devices
print(devices)
return devices


if __name__ == "__main__":
asyncio.run(main())


and this is the error:

[06/17/25 14:25:30] INFO 2025-06-17 14:25:30,554 - INFO | notes.py:267
Starting Asynchronous BAC0 version
2025.06.10 (Lite)
INFO 2025-06-17 14:25:30,558 - INFO | notes.py:267
Using bacpypes3 version 0.0.102
INFO 2025-06-17 14:25:30,559 - INFO | notes.py:267
Use BAC0.log_level to adjust
verbosity of the app.
INFO 2025-06-17 14:25:30,560 - INFO | notes.py:267
Ex. BAC0.log_level('silence') or
BAC0.log_level('error')
INFO 2025-06-17 14:25:30,769 - INFO | Lite.py:173
Using ip : 10.227.6.203/24 on port
47808 | broadcast : 10.227.6.255
[06/17/25 14:25:31] INFO 2025-06-17 14:25:31,266 - INFO | notes.py:267
Using default JSON configuration file
[06/17/25 14:25:31] INFO 2025-06-17 14:25:31,285 - INFO | notes.py:267
Registered as BACnet/IP App | mode
normal
INFO 2025-06-17 14:25:31,294 - INFO | notes.py:267
Device instance (id) : 3056765
None
[06/17/25 14:25:31] INFO 2025-06-17 14:25:31,296 - INFO | notes.py:267
Installing recurring task Ping
Registered Devices Task
(id:1649739199696)
INFO 2025-06-17 14:25:31,314 - INFO | notes.py:267
Installing recurring task Cleanup
Tasks List (id:1649740171536)
Exception in callback IPv4DatagramServer.set_local_transport_protocol()()
handle: <Handle IPv4DatagramServer.set_local_transport_protocol()()>
Traceback (most recent call last):
File "C:\Users\l\AppData\Local\Programs\Python\Python313\Lib\asyncio\events.py", line 89, in _run
self._context.run(self._callback, *self._args)
~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\l\Documents\Repository\24T014\.venv\Lib\site-packages\bacpypes3\ipv4\__init__.py", line 176, in set_local_transport_protocol
transport, protocol = task.result()
~~~~~~~~~~~^^
File "C:\Users\l\Documents\Repository\24T014\.venv\Lib\site-packages\bacpypes3\ipv4\__init__.py", line 159, in retrying_create_datagram_endpoint
return await loop.create_datagram_endpoint(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
IPv4DatagramProtocol, local_addr=addrTuple, allow_broadcast=True
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\l\AppData\Local\Programs\Python\Python313\Lib\asyncio\base_events.py", line 1484, in create_datagram_endpoint
await waiter
asyncio.exceptions.CancelledError

Process finished with exit code 0

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