first commit

test/device.py

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+import socket
+import time
+from protocol import build_frame
+
+SERVER_IP = '127.0.0.1'
+SERVER_PORT = 9000
+
+DEVICE_ID = 10000052  # 每个设备改这个
+
+with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+    s.connect((SERVER_IP, SERVER_PORT))
+    print(f"[DEVICE {DEVICE_ID}] connected")
+
+    while True:
+        # 发送心跳
+        hb = build_frame(0x00, DEVICE_ID)
+        s.sendall(hb)
+
+        # 接收控制指令
+        s.settimeout(1)
+        try:
+            data = s.recv(1024)
+            if data and data[8] == 0xA0:
+                print(f"[DEVICE {DEVICE_ID}] recv A0:", data.hex(' '))
+                # 这里执行你的 IO / GPIO
+        except socket.timeout:
+            pass
+
+        time.sleep(3)