108 lines
4.2 KiB
Python
108 lines
4.2 KiB
Python
import argparse
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import asyncio
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import requests
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# Import the status_pb2.py file generated by `protoc`.
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# This file must be in the same directory as logger.py.
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import status_pb2
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import websockets
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from datetime import datetime
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class OdroidPowerLogger:
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"""
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A class to connect to the Odroid Smart Power monitoring server and log power data.
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1. Logs into the server via an HTTP POST request to obtain an authentication token.
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2. Connects to the WebSocket using the obtained token.
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3. Receives and decodes binary data in Protobuf format, then prints it.
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"""
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def __init__(self, host, username, password):
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self.host = host
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self.username = username
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self.password = password
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self.base_url = f"http://{self.host}"
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self.ws_url = f"ws://{self.host}/ws"
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self.token = None
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def login(self):
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"""Logs into the server to retrieve an authentication token."""
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login_url = f"{self.base_url}/login"
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payload = {"username": self.username, "password": self.password}
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try:
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print(f"Attempting to log in to '{login_url}'...")
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response = requests.post(login_url, json=payload, timeout=5)
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response.raise_for_status()
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response_json = response.json()
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if "token" in response_json:
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self.token = response_json["token"]
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print("Login successful! Token received.")
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return True
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else:
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print("Login failed: No token in response.")
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return False
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except requests.exceptions.RequestException as e:
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print(f"Error during login: {e}")
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return False
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async def listen_power_data(self):
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"""Connects to the WebSocket to receive and log power data."""
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if not self.token:
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print("Cannot connect to WebSocket without an authentication token.")
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return
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# Add the authentication token as a query parameter
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uri = f"{self.ws_url}?token={self.token}"
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try:
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async with websockets.connect(uri) as websocket:
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print(f"Connected to WebSocket: {uri}")
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while True:
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# Receive binary message from the server
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message_bytes = await websocket.recv()
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# Decode the Protobuf message
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status_message = status_pb2.StatusMessage()
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status_message.ParseFromString(message_bytes)
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# Process only if the payload type is 'sensor_data'
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if status_message.WhichOneof('payload') == 'sensor_data':
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sensor_data = status_message.sensor_data
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ts = datetime.fromtimestamp(sensor_data.timestamp).strftime('%Y-%m-%d %H:%M:%S')
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print(f"--- {ts} (Uptime: {sensor_data.uptime_sec}s) ---")
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# Print data for each channel
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for name, channel in [('VIN', sensor_data.vin), ('MAIN', sensor_data.main),
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('USB', sensor_data.usb)]:
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print(
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f" {name:<4}: {channel.voltage:5.2f} V | {channel.current:5.3f} A | {channel.power:5.2f} W")
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except websockets.exceptions.ConnectionClosed as e:
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print(f"WebSocket connection closed: {e}")
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except Exception as e:
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print(f"Error during WebSocket processing: {e}")
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async def run(self):
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"""Runs the logger."""
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if self.login():
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await self.listen_power_data()
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async def main():
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parser = argparse.ArgumentParser(description="Odroid Smart Power Data Logger")
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parser.add_argument("host", help="Server's host address or IP (e.g., 192.168.1.10)")
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parser.add_argument("-u", "--username", required=True, help="Login username")
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parser.add_argument("-p", "--password", required=True, help="Login password")
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args = parser.parse_args()
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logger = OdroidPowerLogger(host=args.host, username=args.username, password=args.password)
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await logger.run()
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if __name__ == "__main__":
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try:
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asyncio.run(main())
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except KeyboardInterrupt:
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print("\nExiting program.")
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