675 lines
20 KiB
Python
Executable File
675 lines
20 KiB
Python
Executable File
#!/usr/bin/python2 -u
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# coding=utf-8
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import logging
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import re
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import socket
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import sys
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import gobject
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import signals
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import config as cfg
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from dbus.mainloop.glib import DBusGMainLoop
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from pymodbus.client.sync import ModbusSerialClient as Modbus
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from pymodbus.exceptions import ModbusException, ModbusIOException
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from pymodbus.other_message import ReportSlaveIdRequest
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from pymodbus.pdu import ExceptionResponse
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from pymodbus.register_read_message import ReadInputRegistersResponse
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from data import BatteryStatus, BatterySignal, Battery, ServiceSignal
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from python_libs.ie_dbus.dbus_service import DBusService
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import time
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import os
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import csv
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import pika
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import zipfile
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import hashlib
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import base64
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import hmac
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import requests
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from datetime import datetime
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import io
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import json
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from convert import first
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CSV_DIR = "/data/csv_files/"
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INSTALLATION_NAME_FILE = '/data/innovenergy/openvpn/installation-name'
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# trick the pycharm type-checker into thinking Callable is in scope, not used at runtime
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# noinspection PyUnreachableCode
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if False:
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from typing import Callable, List, Iterable, NoReturn
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RESET_REGISTER = 0x2087
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def compress_csv_data(csv_data, file_name="data.csv"):
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memory_stream = io.BytesIO()
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# Create a zip archive in the memory buffer
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with zipfile.ZipFile(memory_stream, 'w', zipfile.ZIP_DEFLATED) as archive:
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# Add CSV data to the ZIP archive using writestr
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archive.writestr(file_name, csv_data.encode('utf-8'))
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# Get the compressed byte array from the memory buffer
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compressed_bytes = memory_stream.getvalue()
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# Encode the compressed byte array as a Base64 string
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base64_string = base64.b64encode(compressed_bytes).decode('utf-8')
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return base64_string
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class S3config:
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def __init__(self):
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self.bucket = cfg.S3BUCKET
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self.region = "sos-ch-dk-2"
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self.provider = "exo.io"
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self.key = cfg.S3KEY
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self.secret = cfg.S3SECRET
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self.content_type = "application/base64; charset=utf-8"
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@property
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def host(self):
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return "{}.{}.{}".format(self.bucket, self.region, self.provider)
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@property
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def url(self):
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return "https://{}".format(self.host)
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def create_put_request(self, s3_path, data):
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headers = self._create_request("PUT", s3_path)
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url = "{}/{}".format(self.url, s3_path)
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response = requests.put(url, headers=headers, data=data)
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return response
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def _create_request(self, method, s3_path):
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date = datetime.utcnow().strftime('%a, %d %b %Y %H:%M:%S GMT')
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auth = self._create_authorization(method, self.bucket, s3_path, date, self.key, self.secret, self.content_type)
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headers = {
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"Host": self.host,
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"Date": date,
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"Authorization": auth,
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"Content-Type": self.content_type
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}
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return headers
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@staticmethod
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def _create_authorization(method, bucket, s3_path, date, s3_key, s3_secret, content_type="", md5_hash=""):
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payload = "{}\n{}\n{}\n{}\n/{}/{}".format(
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method, md5_hash, content_type, date, bucket.strip('/'), s3_path.strip('/')
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)
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signature = base64.b64encode(
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hmac.new(s3_secret.encode(), payload.encode(), hashlib.sha1).digest()
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).decode()
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return "AWS {}:{}".format(s3_key, signature)
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def SubscribeToQueue():
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try:
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connection = pika.BlockingConnection(pika.ConnectionParameters(host="10.2.0.11",
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port=5672,
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virtual_host="/",
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credentials=pika.PlainCredentials("producer", "b187ceaddb54d5485063ddc1d41af66f")))
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channel = connection.channel()
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channel.queue_declare(queue="statusQueue", durable=True)
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print("Subscribed to queue")
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except Exception as ex:
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print("An error occurred while connecting to the RabbitMQ queue:", ex)
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return channel
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previous_warnings = {}
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previous_alarms = {}
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class MessageType:
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ALARM_OR_WARNING = "AlarmOrWarning"
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HEARTBEAT = "Heartbeat"
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class AlarmOrWarning:
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def __init__(self, description, created_by):
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self.date = datetime.now().strftime('%Y-%m-%d')
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self.time = datetime.now().strftime('%H:%M:%S')
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self.description = description
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self.created_by = created_by
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def to_dict(self):
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return {
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"Date": self.date,
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"Time": self.time,
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"Description": self.description,
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"CreatedBy": self.created_by
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}
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channel = SubscribeToQueue()
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# Create an S3config instance
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s3_config = S3config()
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INSTALLATION_ID=int(s3_config.bucket.split('-')[0])
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PRODUCT_ID = 1
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is_first_update = True
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prev_status = 0
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subscribed_to_queue_first_time = False
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heartbit_interval = 0
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def update_state_from_dictionaries(current_warnings, current_alarms, node_numbers):
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global previous_warnings, previous_alarms, INSTALLATION_ID, PRODUCT_ID, is_first_update, channel, prev_status, heartbit_interval, subscribed_to_queue_first_time
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heartbit_interval += 1
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if is_first_update:
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changed_warnings = current_warnings
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changed_alarms = current_alarms
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is_first_update = False
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else:
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changed_alarms = {}
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changed_warnings = {}
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# calculate the diff in warnings and alarms
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prev_alarm_value_list = list(previous_alarms.values())
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alarm_keys = list(previous_alarms.keys())
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for i, alarm in enumerate(current_alarms.values()):
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if alarm != prev_alarm_value_list[i]:
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changed_alarms[alarm_keys[i]] = True
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else:
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changed_alarms[alarm_keys[i]] = False
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prev_warning_value_list=list(previous_warnings.values())
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warning_keys=list(previous_warnings.keys())
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for i, warning in enumerate(current_warnings.values()):
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if warning!=prev_warning_value_list[i]:
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changed_warnings[warning_keys[i]]=True
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else:
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changed_warnings[warning_keys[i]]=False
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status_message = {
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"InstallationId": INSTALLATION_ID,
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"Product": PRODUCT_ID,
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"Status": 0,
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"Type": 1,
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"Warnings": [],
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"Alarms": []
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}
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alarms_number_list = []
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for node_number in node_numbers:
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cnt = 0
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for alarm_value in current_alarms.values():
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if alarm_value:
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cnt+=1
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alarms_number_list.append(cnt)
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warnings_number_list = []
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for node_number in node_numbers:
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cnt = 0
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for warning_value in current_warnings.values():
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if warning_value:
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cnt+=1
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warnings_number_list.append(cnt)
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# Evaluate alarms
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if any(changed_alarms.values()):
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for i, changed_alarm in enumerate(changed_alarms.values()):
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if changed_alarm and list(current_alarms.values())[i]:
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status_message["Alarms"].append(AlarmOrWarning(list(current_alarms.keys())[i],"System").to_dict())
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if any(changed_warnings.values()):
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for i, changed_warning in enumerate(changed_warnings.values()):
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if changed_warning and list(current_warnings.values())[i]:
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status_message["Warnings"].append(AlarmOrWarning(list(current_warnings.keys())[i],"System").to_dict())
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if any(current_alarms.values()):
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status_message["Status"]=2
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if not any(current_alarms.values()) and any(current_warnings.values()):
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status_message["Status"]=1
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if not any(current_alarms.values()) and not any(current_warnings.values()):
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status_message["Status"]=0
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if status_message["Status"]!=prev_status or len(status_message["Warnings"])>0 or len(status_message["Alarms"])>0:
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prev_status=status_message["Status"]
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status_message["Type"]=0
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status_message = json.dumps(status_message)
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channel.basic_publish(exchange="", routing_key="statusQueue", body=status_message)
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print(status_message)
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print("Message sent successfully")
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elif heartbit_interval>=15 or not subscribed_to_queue_first_time:
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print("Send heartbit message to rabbitmq")
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heartbit_interval=0
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subscribed_to_queue_first_time=True
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status_message = json.dumps(status_message)
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channel.basic_publish(exchange="", routing_key="statusQueue", body=status_message)
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previous_warnings = current_warnings.copy()
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previous_alarms = current_alarms.copy()
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return status_message, alarms_number_list, warnings_number_list
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def read_csv_as_string(file_path):
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"""
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Reads a CSV file from the given path and returns its content as a single string.
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"""
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try:
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# Note: 'encoding' is not available in open() in Python 2.7, so we'll use 'codecs' module.
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import codecs
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with codecs.open(file_path, 'r', encoding='utf-8') as file:
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return file.read()
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except IOError as e:
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if e.errno == 2: # errno 2 corresponds to "No such file or directory"
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print("Error: The file {} does not exist.".format(file_path))
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else:
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print("IO error occurred: {}".format(str(e)))
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return None
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def init_modbus(tty):
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# type: (str) -> Modbus
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logging.debug('initializing Modbus')
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return Modbus(
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port='/dev/' + tty,
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method=cfg.MODE,
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baudrate=cfg.BAUD_RATE,
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stopbits=cfg.STOP_BITS,
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bytesize=cfg.BYTE_SIZE,
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timeout=cfg.TIMEOUT,
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parity=cfg.PARITY)
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def init_udp_socket():
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# type: () -> socket
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s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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s.setblocking(False)
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return s
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def report_slave_id(modbus, slave_address):
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# type: (Modbus, int) -> str
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slave = str(slave_address)
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logging.debug('requesting slave id from node ' + slave)
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with modbus:
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request = ReportSlaveIdRequest(unit=slave_address)
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response = modbus.execute(request)
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if response is ExceptionResponse or issubclass(type(response), ModbusException):
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raise Exception('failed to get slave id from ' + slave + ' : ' + str(response))
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return response.identifier
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def identify_battery(modbus, slave_address):
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# type: (Modbus, int) -> Battery
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logging.info('identifying battery...')
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hardware_version, bms_version, ampere_hours = parse_slave_id(modbus, slave_address)
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firmware_version = read_firmware_version(modbus, slave_address)
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specs = Battery(
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slave_address=slave_address,
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hardware_version=hardware_version,
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firmware_version=firmware_version,
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bms_version=bms_version,
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ampere_hours=ampere_hours)
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logging.info('battery identified:\n{0}'.format(str(specs)))
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return specs
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def identify_batteries(modbus):
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# type: (Modbus) -> List[Battery]
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def _identify_batteries():
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slave_address = 0
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n_missing = -255
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while n_missing < 3:
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slave_address += 1
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try:
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yield identify_battery(modbus, slave_address)
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n_missing = 0
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except Exception as e:
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logging.info('failed to identify battery at {0} : {1}'.format(str(slave_address), str(e)))
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n_missing += 1
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logging.info('giving up searching for further batteries')
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batteries = list(_identify_batteries()) # dont be lazy!
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n = len(batteries)
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logging.info('found ' + str(n) + (' battery' if n == 1 else ' batteries'))
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return batteries
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def parse_slave_id(modbus, slave_address):
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# type: (Modbus, int) -> (str, str, int)
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slave_id = report_slave_id(modbus, slave_address)
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sid = re.sub(r'[^\x20-\x7E]', '', slave_id) # remove weird special chars
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match = re.match('(?P<hw>48TL(?P<ah>[0-9]+)) *(?P<bms>.*)', sid)
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if match is None:
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raise Exception('no known battery found')
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return match.group('hw').strip(), match.group('bms').strip(), int(match.group('ah').strip())
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def read_firmware_version(modbus, slave_address):
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# type: (Modbus, int) -> str
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logging.debug('reading firmware version')
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with modbus:
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response = read_modbus_registers(modbus, slave_address, base_address=1054, count=1)
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register = response.registers[0]
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return '{0:0>4X}'.format(register)
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def read_modbus_registers(modbus, slave_address, base_address=cfg.BASE_ADDRESS, count=cfg.NO_OF_REGISTERS):
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# type: (Modbus, int, int, int) -> ReadInputRegistersResponse
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logging.debug('requesting modbus registers {0}-{1}'.format(base_address, base_address + count))
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return modbus.read_input_registers(
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address=base_address,
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count=count,
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unit=slave_address)
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def read_battery_status(modbus, battery):
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# type: (Modbus, Battery) -> BatteryStatus
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"""
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Read the modbus registers containing the battery's status info.
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"""
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logging.debug('reading battery status')
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with modbus:
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data = read_modbus_registers(modbus, battery.slave_address)
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return BatteryStatus(battery, data.registers)
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def publish_values_on_dbus(service, battery_signals, battery_statuses):
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# type: (DBusService, Iterable[BatterySignal], Iterable[BatteryStatus]) -> ()
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publish_individuals(service, battery_signals, battery_statuses)
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publish_aggregates(service, battery_signals, battery_statuses)
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def publish_aggregates(service, signals, battery_statuses):
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# type: (DBusService, Iterable[BatterySignal], Iterable[BatteryStatus]) -> ()
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for s in signals:
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if s.aggregate is None:
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continue
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values = [s.get_value(battery_status) for battery_status in battery_statuses]
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value = s.aggregate(values)
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service.own_properties.set(s.dbus_path, value, s.unit)
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def publish_individuals(service, signals, battery_statuses):
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# type: (DBusService, Iterable[BatterySignal], Iterable[BatteryStatus]) -> ()
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for signal in signals:
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for battery_status in battery_statuses:
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address = battery_status.battery.slave_address
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dbus_path = '/_Battery/' + str(address) + signal.dbus_path
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value = signal.get_value(battery_status)
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service.own_properties.set(dbus_path, value, signal.unit)
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def publish_service_signals(service, signals):
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# type: (DBusService, Iterable[ServiceSignal]) -> NoReturn
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for signal in signals:
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service.own_properties.set(signal.dbus_path, signal.value, signal.unit)
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def upload_status_to_innovenergy(sock, statuses):
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# type: (socket, Iterable[BatteryStatus]) -> bool
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logging.debug('upload status')
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try:
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for s in statuses:
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sock.sendto(s.serialize(), (cfg.INNOVENERGY_SERVER_IP, cfg.INNOVENERGY_SERVER_PORT))
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except:
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logging.debug('FAILED')
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return False
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else:
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return True
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def print_usage():
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print ('Usage: ' + __file__ + ' <serial device>')
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print ('Example: ' + __file__ + ' ttyUSB0')
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def parse_cmdline_args(argv):
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# type: (List[str]) -> str
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if len(argv) == 0:
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logging.info('missing command line argument for tty device')
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print_usage()
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sys.exit(1)
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return argv[0]
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def reset_batteries(modbus, batteries):
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# type: (Modbus, Iterable[Battery]) -> NoReturn
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logging.info('Resetting batteries...')
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for battery in batteries:
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result = modbus.write_registers(RESET_REGISTER, [1], unit=battery.slave_address)
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# expecting a ModbusIOException (timeout)
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# BMS can no longer reply because it is already reset
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success = isinstance(result, ModbusIOException)
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outcome = 'successfully' if success else 'FAILED to'
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logging.info('Battery {0} {1} reset'.format(str(battery.slave_address), outcome))
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logging.info('Shutting down fz-sonick driver')
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exit(0)
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alive = True # global alive flag, watchdog_task clears it, update_task sets it
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def create_update_task(modbus, service, batteries):
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# type: (Modbus, DBusService, Iterable[Battery]) -> Callable[[],bool]
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"""
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Creates an update task which runs the main update function
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and resets the alive flag
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"""
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_socket = init_udp_socket()
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_signals = signals.init_battery_signals()
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csv_signals = signals.create_csv_signals(first(batteries).firmware_version)
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node_numbers = [battery.slave_address for battery in batteries]
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warnings_signals, alarm_signals = signals.read_warning_and_alarm_flags()
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current_warnings = {}
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current_alarms = {}
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def update_task():
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# type: () -> bool
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global alive
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logging.debug('starting update cycle')
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if service.own_properties.get('/ResetBatteries').value == 1:
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reset_batteries(modbus, batteries)
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|
|
|
statuses = [read_battery_status(modbus, battery) for battery in batteries]
|
|
|
|
# Iterate over each node and signal to create rows in the new format
|
|
for i, node in enumerate(node_numbers):
|
|
for s in warnings_signals:
|
|
signal_name = insert_id(s.name, i+1)
|
|
value = s.get_value(statuses[i])
|
|
current_warnings[signal_name] = value
|
|
for s in alarm_signals:
|
|
signal_name = insert_id(s.name, i+1)
|
|
value = s.get_value(statuses[i])
|
|
current_alarms[signal_name] = value
|
|
|
|
status_message, alarms_number_list, warnings_number_list = update_state_from_dictionaries(current_warnings, current_alarms, node_numbers)
|
|
|
|
publish_values_on_dbus(service, _signals, statuses)
|
|
|
|
create_csv_files(csv_signals, statuses, node_numbers, alarms_number_list, warnings_number_list)
|
|
|
|
upload_status_to_innovenergy(_socket, statuses)
|
|
|
|
logging.debug('finished update cycle\n')
|
|
|
|
alive = True
|
|
|
|
return True
|
|
|
|
return update_task
|
|
|
|
def manage_csv_files(directory_path, max_files=20):
|
|
csv_files = [f for f in os.listdir(directory_path)]
|
|
csv_files.sort(key=lambda x: os.path.getctime(os.path.join(directory_path, x)))
|
|
# Remove oldest files if exceeds maximum
|
|
while len(csv_files) > max_files:
|
|
file_to_delete = os.path.join(directory_path, csv_files.pop(0))
|
|
os.remove(file_to_delete)
|
|
def insert_id(path, id_number):
|
|
parts = path.split("/")
|
|
insert_position = parts.index("Devices") + 1
|
|
parts.insert(insert_position, str(id_number))
|
|
return "/".join(parts)
|
|
|
|
def create_csv_files(signals, statuses, node_numbers, alarms_number_list, warnings_number_list):
|
|
timestamp = int(time.time())
|
|
if timestamp % 2 != 0:
|
|
timestamp-=1
|
|
if not os.path.exists(CSV_DIR):
|
|
os.makedirs(CSV_DIR)
|
|
csv_filename = "{}.csv".format(timestamp)
|
|
csv_path = os.path.join(CSV_DIR, csv_filename)
|
|
|
|
with open(csv_path, 'ab') as csvfile:
|
|
csv_writer = csv.writer(csvfile, delimiter=';')
|
|
nodes_config_path = "/Config/Devices/BatteryNodes"
|
|
nodes_list = ",".join(str(node) for node in node_numbers)
|
|
config_row = [nodes_config_path, nodes_list, ""]
|
|
csv_writer.writerow(config_row)
|
|
for i, node in enumerate(node_numbers):
|
|
csv_writer.writerow(["/Battery/Devices/{}/Alarms".format(str(i+1)), alarms_number_list[i], ""])
|
|
csv_writer.writerow(["/Battery/Devices/{}/Warnings".format(str(i+1)), warnings_number_list[i], ""])
|
|
for s in signals:
|
|
signal_name = insert_id(s.name, i+1)
|
|
value = s.get_value(statuses[i])
|
|
row_values = [signal_name, value, s.get_text]
|
|
csv_writer.writerow(row_values)
|
|
|
|
csv_data = read_csv_as_string(csv_path)
|
|
|
|
if csv_data is None:
|
|
print("error while reading csv as string")
|
|
return
|
|
|
|
# zip-comp additions
|
|
compressed_csv = compress_csv_data(csv_data)
|
|
compressed_filename = "{}.csv".format(timestamp)
|
|
|
|
response = s3_config.create_put_request(compressed_filename, compressed_csv)
|
|
if response.status_code == 200:
|
|
#os.remove(csv_path)
|
|
print("Success")
|
|
else:
|
|
failed_dir = os.path.join(CSV_DIR, "failed")
|
|
if not os.path.exists(failed_dir):
|
|
os.makedirs(failed_dir)
|
|
failed_path = os.path.join(failed_dir, csv_filename)
|
|
os.rename(csv_path, failed_path)
|
|
print("Uploading failed")
|
|
manage_csv_files(failed_dir, 10)
|
|
|
|
manage_csv_files(CSV_DIR)
|
|
|
|
|
|
def create_watchdog_task(main_loop):
|
|
# type: (DBusGMainLoop) -> Callable[[],bool]
|
|
"""
|
|
Creates a Watchdog task that monitors the alive flag.
|
|
The watchdog kills the main loop if the alive flag is not periodically reset by the update task.
|
|
Who watches the watchdog?
|
|
"""
|
|
def watchdog_task():
|
|
# type: () -> bool
|
|
|
|
global alive
|
|
|
|
if alive:
|
|
logging.debug('watchdog_task: update_task is alive')
|
|
alive = False
|
|
return True
|
|
else:
|
|
logging.info('watchdog_task: killing main loop because update_task is no longer alive')
|
|
main_loop.quit()
|
|
return False
|
|
|
|
return watchdog_task
|
|
|
|
|
|
def main(argv):
|
|
# type: (List[str]) -> ()
|
|
print("INSIDE DBUS SONICK")
|
|
logging.basicConfig(level=cfg.LOG_LEVEL)
|
|
logging.info('starting ' + __file__)
|
|
|
|
tty = parse_cmdline_args(argv)
|
|
modbus = init_modbus(tty)
|
|
|
|
batteries = identify_batteries(modbus)
|
|
|
|
if len(batteries) <= 0:
|
|
sys.exit(2)
|
|
|
|
service = DBusService(service_name=cfg.SERVICE_NAME_PREFIX + tty)
|
|
|
|
service.own_properties.set('/ResetBatteries', value=False, writable=True) # initial value = False
|
|
|
|
main_loop = gobject.MainLoop()
|
|
|
|
service_signals = signals.init_service_signals(batteries)
|
|
publish_service_signals(service, service_signals)
|
|
|
|
update_task = create_update_task(modbus, service, batteries)
|
|
update_task() # run it right away, so that all props are initialized before anyone can ask
|
|
watchdog_task = create_watchdog_task(main_loop)
|
|
|
|
gobject.timeout_add(cfg.UPDATE_INTERVAL * 2, watchdog_task, priority = gobject.PRIORITY_LOW) # add watchdog first
|
|
gobject.timeout_add(cfg.UPDATE_INTERVAL, update_task, priority = gobject.PRIORITY_LOW) # call update once every update_interval
|
|
|
|
logging.info('starting gobject.MainLoop')
|
|
main_loop.run()
|
|
logging.info('gobject.MainLoop was shut down')
|
|
|
|
sys.exit(0xFF) # reaches this only on error
|
|
|
|
|
|
main(sys.argv[1:])
|