46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
from opcua import ua, Server
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import time
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import random
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if __name__ == "__main__":
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server = Server()
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# 設定端點（本機：4840）
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server.set_endpoint("opc.tcp://0.0.0.0:4840")
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server.set_server_name("MyUA Server")
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# 新增命名空間（回傳 nsIndex）
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idx = server.register_namespace("urn:mycompany:demo")
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# 建立地址空間：一個 Object，底下放一個 Variable
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objects = server.get_objects_node()
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myobj = objects.add_object(idx, "DemoObject")
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#空間建好，可以設變數了
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temp_var = myobj.add_variable(idx, "Temperature", 25.0) # 初值 25.0
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A = myobj.add_variable(idx, "A_value", 1)
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#變數設好，打開Client寫入功能
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temp_var.set_writable() # 允許 Client 寫入
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A.set_writable() # 允許 Client 寫入
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# 啟動 Server
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server.start()
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print("Server started at opc.tcp://localhost:4840")
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x=0
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try:
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while True:
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# 模擬溫度改變
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new_value = 20.0 + random.random() * 10.0
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temp_var.set_value(ua.Variant(new_value, ua.VariantType.Float))
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x=x+1
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A.set_value(ua.Variant(x, ua.VariantType.Int64))
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print(A.get_value())
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print(temp_var.get_value())
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time.sleep(1)
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except KeyboardInterrupt:
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print("Server stopped by user")
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finally:
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server.stop()
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print("Resources released, server closed")
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