Bash script to control an air purifier through LIRC

air_purifier.sh

#!/bin/bash

if [ $1 == "on" ] || [ $1 == "off" ]; then
    irsend SEND_ONCE hoover "KEY_POWER"
    exit
fi

DIR="Home_Automation"
ON_FILE="air_purifier_on.txt"
OFF_FILE="air_purifier_off.txt"

dropbox download "$DIR"

if [ -f "$DIR/$ON_FILE" ]; then
    echo "Turning on Air Purifier"

    # Power On
    irsend SEND_ONCE hoover "KEY_POWER"

    sleep 3

    # Change speed to automatic mode
    irsend SEND_ONCE hoover "KEY_SPEED"
    sleep 2
    irsend SEND_ONCE hoover "KEY_SPEED"

    sleep 2

    # Turn off UV light
    irsend SEND_ONCE hoover "KEY_T"

    # Delete the file
    dropbox delete "$DIR/$ON_FILE"
    rm "$DIR/$ON_FILE"
fi

if [ -f "$DIR/$OFF_FILE" ]; then
    echo "Turning off Air Purifier"

    # Power off
    irsend SEND_ONCE hoover "KEY_POWER"

    # Delete the file
    dropbox delete "$DIR/$OFF_FILE"
    rm "$DIR/$OFF_FILE"
fi