I assume this is how you wanted it to be configured:
It does switch between the two stations in this setup based on the logs:
2025-02-21 20:03:23.940 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.940 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.941 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.941 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.941 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.941 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.941 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.941 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.942 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:23.943 DEBUG (MainThread) [homeassistant.components.sia.binary_sensor] New state will be True
2025-02-21 20:03:23.943 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:22,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:22+00:00, Length: 0029, Sequence: 0000, CRC: A5A7, Calc CRC: A5A7, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:03:22,02-21-2025.
2025-02-21 20:03:27.699 DEBUG (MainThread) [pysiaalarm.base_server] Incoming line: 8BC50026"NULL"0000L0#10C_19:03:26,02-21-2025
2025-02-21 20:03:27.700 DEBUG (MainThread) [pysiaalarm.event] Content matches: {‘account’: None, ‘ti’: None, ‘id’: None, ‘ri’: None, ‘code’: None, ‘message’: None, ‘xdata’: None, ‘timestamp’: ‘19:03:26,02-21-2025’}
2025-02-21 20:03:27.704 DEBUG (MainThread) [homeassistant.components.sia.hub] Adding event to dispatch and bus for code RP for port 20314 and account 10C
2025-02-21 20:03:27.705 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.705 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.705 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.705 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.705 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.706 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.707 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:03:27.707 DEBUG (MainThread) [homeassistant.components.sia.binary_sensor] New state will be True
2025-02-21 20:03:27.707 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:03:26,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 10C, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:03:26+00:00, Length: 0026, Sequence: 0000, CRC: 8BC5, Calc CRC: 8BC5, Encrypted Content: None, Full Message: "NULL"0000L0#10C_19:03:26,02-21-2025.
2025-02-21 20:04:25.746 DEBUG (MainThread) [pysiaalarm.base_server] Incoming line: AFE80029"NULL"0000L0#999999_19:04:24,02-21-2025
2025-02-21 20:04:25.746 DEBUG (MainThread) [pysiaalarm.event] Content matches: {‘account’: None, ‘ti’: None, ‘id’: None, ‘ri’: None, ‘code’: None, ‘message’: None, ‘xdata’: None, ‘timestamp’: ‘19:04:24,02-21-2025’}
2025-02-21 20:04:25.751 DEBUG (MainThread) [homeassistant.components.sia.hub] Adding event to dispatch and bus for code RP for port 20313 and account 999999
2025-02-21 20:04:25.751 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.751 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.752 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.752 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.752 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.752 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.752 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.752 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.753 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.754 DEBUG (MainThread) [homeassistant.components.sia.entity] Received event: Content: ]_19:04:24,02-21-2025, Zone (ri): 0, Code: RP, Message: , Account: 999999, Receiver: None, Line: L0, Timestamp: 2025-02-21 19:04:24+00:00, Length: 0029, Sequence: 0000, CRC: AFE8, Calc CRC: AFE8, Encrypted Content: None, Full Message: "NULL"0000L0#999999_19:04:24,02-21-2025.
2025-02-21 20:04:25.754 DEBUG (MainThread) [homeassistant.components.sia.binary_sensor] New state will be True
Switching to CID codes makes no difference. Firmware on the board seems to be the latest available (build date 2024-03-12).