67 lines
2.7 KiB
Python
67 lines
2.7 KiB
Python
# command_0A.py
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import struct
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import logging
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class Command0A:
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def build_0a_request(self, pile_id):
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frame = bytearray([0x4A, 0x58, 0x0A]) # 帧头 + 命令
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frame.extend(pile_id) # 桩号
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frame.append(0x01) # 数据加密方式（不加密）
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# 数据域：时间标识 + 记录类型
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data = bytearray()
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current_time = bytearray([0x19, 0x03, 0x0A, 0x13, 0x14, 0x00]) # 示例：2025-03-10 13:14:00
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data.extend(current_time)
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data.append(0x01) # 记录类型（0x01: 最近记录）
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frame.extend(struct.pack('<H', len(data))) # 数据域长度
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frame.extend(data)
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# 计算校验码
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checksum = 0
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for b in frame[2:-1]:
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checksum ^= b
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frame.append(checksum)
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return frame
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def process_0a_response(self, data):
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logging.debug(f"处理0A响应: {data.hex().upper()}")
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if len(data) < 14:
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logging.warning("0A数据长度不足")
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return
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pile_id = data[3:11]
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data_start = 14
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data_len = struct.unpack('<H', data[12:14])[0]
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data_end = data_start + data_len
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if len(data) < data_end + 1:
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logging.warning("0A数据域长度不匹配")
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return
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# 提取字段
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timestamp = data[data_start:data_start + 6]
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record_type = data[data_start + 6]
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offset = data_start + 7
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# 假设数据域包含一条充电记录（开始时间、结束时间、电量等）
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if offset + 19 > data_end: # 示例：6字节开始时间 + 6字节结束时间 + 4字节电量 + 1字节状态
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logging.warning("0A记录数据不足")
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return
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start_time = data[offset:offset + 6]
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end_time = data[offset + 6:offset + 12]
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energy = struct.unpack('<f', data[offset + 12:offset + 16])[0] # 电量（kWh，浮点数）
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status = data[offset + 16]
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# 转换为键值对
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parsed_data = {
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"pile_id": pile_id.hex().upper(),
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"timestamp": f"20{timestamp[0]:02X}-{timestamp[1]:02X}-{timestamp[2]:02X} {timestamp[3]:02X}:{timestamp[4]:02X}:{timestamp[5]:02X}",
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"record_type": f"0x{record_type:02X}",
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"record": {
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"start_time": f"20{start_time[0]:02X}-{start_time[1]:02X}-{start_time[2]:02X} {start_time[3]:02X}:{start_time[4]:02X}:{start_time[5]:02X}",
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"end_time": f"20{end_time[0]:02X}-{end_time[1]:02X}-{end_time[2]:02X} {end_time[3]:02X}:{end_time[4]:02X}:{end_time[5]:02X}",
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"energy_kwh": energy,
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"status": f"0x{status:02X}"
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}
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}
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logging.info(f"0A解析结果: {parsed_data}") |