Published November 12, 2023 © GPL3+

Speech Controlled Servo With Firmata and Python

Control your servo motor with your voice!

BeginnerProtip30 minutes498

Speech Controlled Servo With Firmata and Python

Things used in this project

Hardware components

Arduino Mega 2560

SG90 Micro-servo motor

Jumper wires (generic)

Software apps and online services

Arduino IDE

PyCharm

Story

Intro

In this tutorial, you'll learn how to control a servo using your voice! I will be using the PyCharm IDE for this project, but any other method of coding with Python should work. Any servo with 0-180 degrees of rotation will work. I use an Arduino Mega 2560, but any Arduino should work.Intro

Intro

Wiring the Servo

The red wire on the servo should connect to the 5V pin on your Arduino, and the black (sometimes brown) one will go to the ground pin (GND). The yellow (sometimes orange) wire should go into digital pin 9.

Arduino Code

Open up a new sketch and go to File>Examples>Firmata>StandardFirmata . Then upload the sketch to your Arduino. Firmata is a special feature that allows your Arduino to communicate with software on your device, like Python. This will setup Firmata so that we can control the servo using Python.

Python Code

At the bottom of the page is the Python code for speech recognition. Copy and paste it into whatever code editor you are using. Again, I am using PyCharm.

This code will access your computers microphone to listen for voices. Using a pretrained speech recognition model, it can discern words. Our code collects the audio in real time, extracts the words and converts it into text, checks if the word was a number, and if it was, it will make the servo angle move to the number spoken.

Final Result

Plug in your Arduino to your computer, with the servo wired up and the Arduino code uploaded. Then, run the Python code. Say a number between 0 to 180 and watch the servo move to the desired position!

Code

Python Code for Speech Recognition

import speech_recognition
from pyfirmata import Arduino, SERVO, util
from time import sleep

#Define port, board, and servo pin
port = 'COM4'
servoPin = 9
myBoard = Arduino(port)
myBoard.digital[servoPin].mode = SERVO

#Define the speech recognizer
recognizer = speech_recognition.Recognizer()

#Infinite loop
while True:
    try:
        #Collect audio and turn it into text using a speech recognizer from Google
        with speech_recognition.Microphone() as mic:
            recognizer.adjust_for_ambient_noise(mic, duration=0.0)
            audio = recognizer.listen(mic)

            text = recognizer.recognize_google(audio)
            text = text.lower()
            print(text)

            #Check if the word spoken was a number. If it was, write it to the servo
            if text.isnumeric():
                myBoard.digital[servoPin].write(int(text))
                sleep(0.015)


    except speech_recognition.UnknownValueError:

        recognizer = speech_recognition.Recognizer()
        continue

Credits

mahdi syed

3 projects • 1 follower

I'm a passionate programmer with extensive experience in robotics, app design, web design, IOT, and AI.

Contact

Comments

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Speech Controlled Servo With Firmata and Python

Things used in this project

Hardware components

Software apps and online services

Story

Intro

Intro

Wiring the Servo

Arduino Code

Python Code

Final Result

Schematics

Servo wiring diagram

Code

Python Code for Speech Recognition

Credits

mahdi syed

Comments

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Speech Controlled Servo With Firmata and Python

Speech Controlled Servo With Firmata and Python

Things used in this project

Hardware components

Software apps and online services

Story

Intro

Intro

Wiring the Servo

Arduino Code

Python Code

Final Result

Schematics

Servo wiring diagram

Code

Python Code for Speech Recognition

Credits

mahdi syed

Comments

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