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