测试了密胺的整个流程、add(点位设置界面增加了 停止功能按钮)、fix bug(修复了点位名称写入数据库不一致的错误)

app/service/weight.py

@@ -0,0 +1,109 @@
+import socket
+import json
+import time
+
+target_weight = 660  # 目标重量
+
+# 称重指令
+cmd_set_target = {
+    # 称量
+    "command": "set_target",
+    "payload": {
+        "target_weight": target_weight,
+        "algorithm": "pid",
+        "direction_control": False,
+    },
+}
+
+# 清零
+cmd_set_zero = {
+    # 去皮
+    "command": "set_zero"
+}
+
+cmd_get_weight = {
+    # 获取重量
+    "command": "get_weight"
+}
+
+
+def start_weight(host="192.168.58.25", port=5000):
+    """
+    连接称重设备，发送目标重量并等待达到指定值
+
+    Args:
+        target_weight: 目标重量值
+        cmd_set_zero: 去皮
+        cmd_set_target: 称重
+        cmd_get_weight: 获取重量
+        host: 服务器IP地址
+        port: 服务器端口
+
+    Returns:
+        成功时返回达到的目标重量, 失败时返回None
+    """
+    try:
+        with socket.socket() as s:
+            s.connect((host, port))
+
+            # 去皮
+            s.sendall(json.dumps(cmd_set_zero).encode())
+            time.sleep(1)  # 等待去皮完成
+
+            # 检查去皮是否完成
+            s.sendall(json.dumps(cmd_get_weight).encode())
+            weight_data = s.recv(1024)
+            response = json.loads(weight_data.decode())
+            zero_weight = response.get("current_weight")
+            print("清零后的重量:", zero_weight)
+    except (socket.error, json.JSONDecodeError, UnicodeDecodeError) as e:
+        print(f"start_weight错误: {e}")
+        return None
+
+    try:
+        with socket.socket() as s:
+            if isinstance(zero_weight, (int, float)) and abs(zero_weight) < 0.01:
+                s.connect((host, port))
+                # 称重
+                s.sendall(json.dumps(cmd_set_target).encode())
+
+                while True:
+                    data = s.recv(1024)
+                    if not data:
+                        print("start_weight错误: 服务器连接已关闭")
+                        return None
+
+                    try:
+                        decoded = data.decode()
+                        response = json.loads(decoded)
+                        current_weight = response.get("current_weight")
+                        if current_weight is not None:
+                            print(f"当前重量：{current_weight}")
+                            if current_weight >= target_weight:
+                                return current_weight  # 达到目标重量后返回
+                        else:
+                            print(f"获取的重量为None: {current_weight}")
+                            return None
+
+                    except json.JSONDecodeError:
+                        print(f"start_weight错误: 无效的JSON格式: {decoded}")
+                        return None
+                    except UnicodeDecodeError:
+                        print(
+                            f"start_weight错误: 字节解码错误, 无法解析字节流data为字符串"
+                        )
+                        return None
+            else:
+                print("start_weight错误: 去皮失败, 中止称量流程, 请检查设备")
+                return None
+    except socket.error as e:
+        print(f"start_weight错误: 通信错误: {e}")
+        return None
+
+
+if __name__ == "__main__":
+    if start_weight():
+        print("称重完毕")
+    else:
+        print("称重发生错误")
+        exit(-1)