nebuleair_pro_4g/wifi/power_save.py

#!/usr/bin/env python3
r'''
 __        ___ ___ ___   ____
 \ \      / (_)  _(_) | |  _ \ _____      _____ _ __
  \ \ /\ / /| | | | | | | |_) / _ \ \ /\ / / _ \ '__|
   \ V  V / | | | | | | |  __/ (_) \ V  V /  __/ |
    \_/\_/  |_|_| |_|_| |_|    \___/ \_/\_/ \___|_|
      ____
     / ___|  __ ___   _____
     \___ \ / _` \ \ / / _ \
      ___) | (_| |\ V /  __/
     |____/ \__,_| \_/ \___|

WiFi Power Saving Script
Disables WiFi after 10 minutes of boot if wifi_power_saving is enabled in config.
Saves ~100-200mA of power consumption.

Usage:
/usr/bin/python3 /var/www/nebuleair_pro_4g/wifi/power_save.py
'''

import sqlite3
import subprocess
import sys
import datetime

# Paths
DB_PATH = "/var/www/nebuleair_pro_4g/sqlite/sensors.db"
LOG_PATH = "/var/www/nebuleair_pro_4g/logs/app.log"

def log_message(message):
    """Write message to log file with timestamp"""
    timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    log_entry = f"[{timestamp}] [WiFi Power Save] {message}\n"
    try:
        with open(LOG_PATH, "a") as log_file:
            log_file.write(log_entry)
    except Exception as e:
        print(f"Failed to write to log: {e}", file=sys.stderr)
    print(log_entry.strip())

def get_config_value(key):
    """Read configuration value from database"""
    try:
        conn = sqlite3.connect(DB_PATH)
        cursor = conn.cursor()
        cursor.execute("SELECT value FROM config_table WHERE key = ?", (key,))
        result = cursor.fetchone()
        conn.close()
        return result[0] if result else None
    except sqlite3.Error as e:
        log_message(f"Database error: {e}")
        return None

def is_wifi_enabled():
    """Check if WiFi radio is currently enabled"""
    try:
        result = subprocess.run(
            ["nmcli", "radio", "wifi"],
            capture_output=True,
            text=True,
            timeout=10
        )
        return result.stdout.strip() == "enabled"
    except Exception as e:
        log_message(f"Failed to check WiFi status: {e}")
        return None

def disable_wifi():
    """Disable WiFi radio using nmcli"""
    try:
        result = subprocess.run(
            ["sudo", "nmcli", "radio", "wifi", "off"],
            capture_output=True,
            text=True,
            timeout=10
        )
        if result.returncode == 0:
            log_message("WiFi disabled successfully - saving ~100-200mA power")
            return True
        else:
            log_message(f"Failed to disable WiFi: {result.stderr}")
            return False
    except subprocess.TimeoutExpired:
        log_message("Timeout while trying to disable WiFi")
        return False
    except Exception as e:
        log_message(f"Error disabling WiFi: {e}")
        return False

def main():
    """Main function"""
    log_message("WiFi power save script started")

    # Check if wifi_power_saving is enabled in config
    wifi_power_saving = get_config_value("wifi_power_saving")

    if wifi_power_saving is None:
        log_message("wifi_power_saving config not found - skipping (run migration or set_config.py)")
        return 0

    if wifi_power_saving == "0":
        log_message("WiFi power saving is disabled in config - WiFi will remain enabled")
        return 0

    log_message("WiFi power saving is enabled in config")

    # Check current WiFi status
    wifi_enabled = is_wifi_enabled()
    if wifi_enabled is None:
        log_message("Could not determine WiFi status - aborting")
        return 1

    if not wifi_enabled:
        log_message("WiFi is already disabled - nothing to do")
        return 0

    # Disable WiFi
    log_message("Disabling WiFi after 10-minute configuration window...")
    if disable_wifi():
        log_message("WiFi power save completed successfully")
        return 0
    else:
        log_message("WiFi power save failed")
        return 1

if __name__ == "__main__":
    sys.exit(main())