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System commands let you interact with Jarvis as a program rather than as a task executor. You can greet the assistant, change how it sounds, or shut it down — all by voice. These commands are dispatched first in execute_the_command_said_by_user(), meaning they are always available regardless of what other command logic is active.

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Greeting

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”hello”

Say “hello” to receive a greeting from Jarvis. 
def command_hello():
    speak("Hello Sir")

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Startup greeting with wish_me()

When Jarvis first launches it greets you based on the current time of day. The wish_me() function in actions.py checks datetime.datetime.now().hour and picks the appropriate salutation: 
def wish_me(master):
    hour = datetime.datetime.now().hour

    if hour >= 0 and hour < 12:
        speak("Good Morning" + master)

    elif hour >= 12 and hour < 18:
        speak("Good Afternoon" + master)

    else:
        speak("Good Evening" + master)
master is the name configured in config.ini under [DEFAULT] → master. The greeting is spoken immediately after “Initializing Jarvis….” every time the program starts.

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Exiting

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”bye”

Say “bye” for a polite farewell before the program terminates. 
def command_bye():
    speak("Bye Sir, have a good day.")
    sys.exit()

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”nothing” / “abort” / “stop”

All three phrases trigger the same function. Use them when you want to cancel the current session or when you have no more commands to give: 
def command_nothing():
    speak("okay")
    speak("Bye Sir, have a good day.")
    sys.exit()
Saying “stop” triggers command_nothing() and exits the program. If you only want to stop music playback, say “stop music” instead. The word “stop” alone is reserved as a program exit command.

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Voice and speech settings

These commands let you change how Jarvis sounds at runtime. After asking “Do you want to keep this config?”, Jarvis listens for a “yes” reply — if given, the new value is written back to config.ini so it persists across restarts.

​
Change voice gender

Say “change voice to male” or “change voice to female”: 
def change_voice(query, take_command):
    try:
        voice = query.split('to')[-1]
        if voice == "male":
            engine.setProperty('voice', voices[0].id)
            speak("¿Do you want to keep this config?")
            if take_command() == "yes":
                config['DEFAULT']['voice'] = 'Male'
                with open('config.ini', 'w') as configfile:
                    config.write(configfile)

        elif voice == "female":
            engine.setProperty('voice', voices[1].id)
            speak("¿Do you want to keep this config?")
            answer = take_command()
            if answer == "yes":
                config['DEFAULT']['voice'] = 'Female'
                with open('config.ini', 'w') as configfile:
                    config.write(configfile)
        else:
            speak("Invalid value. Please try again.")
    except Exception:
        speak("Invalid value. Please try again.")

​
Change speech rate

Say “change rate to [number]” (e.g. “change rate to 150”). The default rate is 150 words per minute: 
def change_rate(query, take_command):
    try:
        rate = query.split('to')[-1]
        engine.setProperty('rate', int(rate))
        speak("¿Do you want to keep this config?")
        answer = take_command()
        if answer == "yes":
            config['DEFAULT']['rate'] = rate
            with open('config.ini', 'w') as configfile:
                config.write(configfile)
    except Exception:
        speak("Invalid value. Please try again.")

​
Change volume

Say “change volume to [number]” where the number is a percentage from 0 to 100 (e.g. “change volume to 80”). The value is divided by 100 before being passed to pyttsx3, which expects a float between 0.0 and 1.0: 
def change_volume(query, take_command):
    try:
        volume = query.split('to')[-1]
        engine.setProperty('volume', int(volume)/100)
        speak("¿Do you want to keep this config?")
        answer = take_command()
        if answer == "yes":
            config['DEFAULT']['volume'] = volume
            with open('config.ini', 'w') as configfile:
                config.write(configfile)
    except Exception:
        speak("Invalid value. Please try again.")

​
The “Next Command Sir” prompt

After every command — including system commands — Jarvis says “Next Command! Sir!”. This is an unconditional call at the end of execute_the_command_said_by_user() that signals the assistant is ready for input again: 
    # ... all command branches above ...

    speak("Next Command! Sir!")

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Debug mode

When debug = True in config.ini, Jarvis replaces the microphone with a terminal prompt. Instead of listening through your microphone, it calls input() and waits for you to type a command: 
if debug == "True":
    def take_command():
        return input("Command |--> ")
This is useful for rapid testing, running in environments without a microphone, or developing new commands without speaking every time. 
[DEFAULT]
debug = True
Debug mode also enables print() output for intermediate results such as Wikipedia summaries and unknown website names. Set debug = False for normal voice-only operation.

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