PurimIrisBox - Speech Engine

speech_engine.py

import os
import sys
import subprocess
import RPi.GPIO as GPIO # Import Raspberry Pi GPIO library
from pocketsphinx import LiveSpeech, get_model_path
import sounddevice as sd
import time

# Function to list
print("Available audio devices:")
print(sd.query_devices())


PIPE_NAME='mypipe'

# Correct path to the model
model_path = "/usr/share/pocketsphinx/model/en-us"  # Update this line with the actual path

#speech = LiveSpeech(lm=False,dic=os.path.join(model_path, 'cmudict-en-us.dict'), kws="keyphrase.list")
#model_path = get_model_path()

def send_to_pipe(key, value, pipe_name):
    # Construct the string to be sent
    data_str = f"{{'{key}':{value}}}"

    # Construct the command with data_str enclosed in double quotes
    command = f"echo \"{data_str}\" > {pipe_name}"

    # Execute the command
    subprocess.run(command, shell=True)


# Variables for debouncing/hysteresis
last_state = None
last_time = time.time()
debounce_time = 0.5  # 500 milliseconds
cover_open = False

def button_callback(channel):
    global last_state, last_time, cover_open

    current_state = GPIO.input(channel)
    current_time = time.time()

    # Check if state has changed and if it's stable for longer than the debounce time
    if current_state != last_state and (current_time - last_time) > debounce_time:
        last_state = current_state
        last_time = current_time
        if cover_open:
           send_to_pipe("led", "(255,255,0)", PIPE_NAME)
           send_to_pipe("servo", "0.9", PIPE_NAME)
        else:
           send_to_pipe("led", "(0,255,0)", PIPE_NAME)
           send_to_pipe("servo", "-0.8", PIPE_NAME)

        # Toggle the state for the next call
        cover_open = not cover_open



#gpio init
GPIO.setwarnings(False) # Ignore warning for now
GPIO.setmode(GPIO.BOARD) # Use physical pin numbering
GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 10 to be an input pin and set initial value to be pulled low (off)
GPIO.add_event_detect(11,GPIO.RISING,callback=button_callback) # Setup event on pin 10 rising edge


send_to_pipe("led", "(255,0,0)", PIPE_NAME)
send_to_pipe("servo", "0.9", PIPE_NAME)

speech = LiveSpeech(
#    verbose=False,
    sampling_rate=16000,
    buffer_size=2048,
    no_search=False,
    full_utt=False,
    hmm=os.path.join(model_path, 'en-us'),
#    lm=os.path.join(model_path, 'en-us.lm.bin'),
    dic=os.path.join(model_path, 'cmudict-en-us.dict'),
    kws='/home/asafm/PurimIrisBox/keyphrase.list'  # Path to your keyword list file
)

print("Listening for the specific phrase...")

send_to_pipe("led", "(255,255,0)", PIPE_NAME)

for phrase in speech:
    try:
        print(phrase)
        if "shoshana" in str(phrase):
#        if "shoshanat yaacov" in str(phrase):
            print("Phrase Detected!")
            send_to_pipe("led", "(0,255,0)", PIPE_NAME)    
            send_to_pipe("servo", "-0.8", PIPE_NAME)
            cover_open= True
    except Exception as e:
        print(f"An error occurred: {e}")
        break  # Exit the loop cleanly
        servo.close()
        GPIO.cleanup([11]) # Clean up
        sys.exit(0)