Send voice message to Telegram using Raspberry Pi.

RPiTelegramVoiceMessage.py

from gpiozero import LED, Buzzer, Button, OutputDevice
from time import time, sleep, strftime
from datetime import datetime
import os
import signal
import telepot

led1 = LED(17)
sw1 = Button(21)
buzzer = Buzzer(26)

def handle(msg):
  global telegramText
  global chat_id
  global telegramMessage
  
  chat_id = msg['chat']['id']
  telegramText = msg['text']
  
  print('Message received from ' + str(chat_id))
  
  if telegramText == '/start':
    bot.sendMessage(chat_id, 'Welcome to Idris Bot')
  
  else:
    buzzer.beep(0.1, 0.1, 2)
    telegramMessage = True

def sw1Pressed():
    global sw1ButtonPressed
    sw1ButtonPressed = True
    
def sw1Released():
    global newSpeechRecord
    newSpeechRecord = True
    led1.off()
    os.system('pkill arecord')

bot = telepot.Bot('YOUR TELEGRAM BOT TOKEN')
bot.message_loop(handle)

print("Telegram bot is ready")

sw1.when_pressed = sw1Pressed
sw1.when_released = sw1Released

telegramMessage = False
sendAudioEnable = False
newSpeechRecord = False
sw1ButtonPressed = False

buzzer.beep(0.1, 0.1, 1)

try:
    while True:
        if telegramMessage == True:
            telegramMessage = False

            if telegramText == 'ENABLE':
                sendAudioEnable = True
                print("Send speech audio is enable.")
                bot.sendMessage(chat_id, "Send speech audio is enable.")
        
        if sw1ButtonPressed == True:
            sw1ButtonPressed = False
            led1.on()
            print("Start recording...")
            os.system('arecord -D hw:1,0 -f cd record.wav -c 1')
        
        if newSpeechRecord == True and sendAudioEnable == True:
            newSpeechRecord = False
            print("Send audio to Telegram.")
            bot.sendAudio(chat_id, audio=open('record.wav', 'rb'))
            
except KeyboardInterrupt:
    led1.off()