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Joined 1 year ago
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Cake day: May 31st, 2023

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  • Depends on how much you want to set up. For my purposes, I just check for connectivity every minute, and record true or false as a new row in a sqlite database if there is connectivity.

    This is what I use on my raspberry pi,

    #!/usr/bin/env python3
    from datetime import datetime
    import sqlite3
    import socket
    from pathlib import Path
    
    try:
        host = socket.gethostbyname("one.one.one.one")
        s = socket.create_connection((host, 80), 2)
        s.close()
        connected = True
    except:
        connected = False
    timestamp = datetime.now().isoformat()
    
    db_file = Path(__file__).resolve().parent / 'Database.sqlite3'
    conn = sqlite3.connect(db_file)
    curs = conn.cursor()
    curs.execute('''CREATE TABLE IF NOT EXISTS checks (id INTEGER PRIMARY KEY AUTOINCREMENT, timestamp TEXT, connected INTEGER)>
    curs.execute('''INSERT INTO checks (timestamp, connected) VALUES (?, ?);''', (timestamp, 1 if connected else 0))
    conn.commit()
    conn.close()
    

    and I just have a crontab entry * * * * * ~/connectivity_check/check.py >/dev/null 2>&1 to run it every minute.

    Then I just check for recent disconnects via:

    $ sqlite3 ./connectivity_check/Database.sqlite3 'select count(*) from checks where connected = 0 order by timestamp desc;'
    

    Obviously, it’s not as full-featured as something with configurable options or a web UI etc, but for my purposes, it does exactly what I need with absolutely zero overhead.