[Python] Python cannot send text to arduino

Im trying to send the string variable from python onto arduino and print it on an lcd but it doesnt print on the lcd

Arduino Code to get the text from python and print it on an lcd

`Sometimes i get a "Çalışmanız programın 5798 bayt (17 %) saklama alanını kullandı. Maksimum 32256 bayt. Global değişkenler belleğin 413 byte kadarını (20%) kullanıyor. Yerel değişkenler için 1635 byte yer kalıyor. En fazla 2048 byte kullanılabilir. avrdude: ser_open(): can't open device "\.\COM3": Eri�im engellendi.

Problem uploading to board. See https://support.arduino.cc/hc/en-us/sections/360003198300 for suggestions. " error message`

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x20, 16, 2);
String buffer = "";

void setup() {
Serial.begin(9600);
lcd.begin(16, 2);
lcd.backlight(); // Turn on LCD backlight
}

void loop() {
while (Serial.available()) {
char c = Serial.read();
if (c == '\n') {
lcd.clear();
lcd.setCursor(0, 0);

// If text is longer than 16 characters, split across lines
lcd.print(buffer.substring(0, 16));
if (buffer.length() > 16) {
lcd.setCursor(0, 1);
lcd.print(buffer.substring(16, 32));
}

buffer = ""; // Reset buffer after displaying
} else {
buffer += c;
}
}
}


Python Code to record audio and send it to assemblyai, get it as text, print it and send it to the arduino

import pyaudio
import wave
import requests
import json
import time
import uuid # For generating unique filenames
import os
import serial

ser = serial.Serial('COM3', 9600, timeout=1) # Adjust COM port as needed

# AssemblyAI API config
ASSEMBLYAI_API_KEY = 'f23aea7876d845bba0c9a3f282e8dfef' # <-- Put your AssemblyAI API key here
UPLOAD_ENDPOINT = 'https://api.assemblyai.com/v2/upload'
TRANSCRIPT_ENDPOINT = 'https://api.assemblyai.com/v2/transcript'

headers_auth = {
'authorization': ASSEMBLYAI_API_KEY,
'content-type': 'application/json'
}

# Function to generate a random filename
def generate_random_filename(extension="wav"):
random_name = str(uuid.uuid4()) # Use UUID for uniqueness
global nameoffile
nameoffile = f"{random_name}.{extension}"
return nameoffile

# Function to record audio from the microphone
def record_audio(filename, duration=5):
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 16000
CHUNK = 1024
RECORD_SECONDS = duration
WAVE_OUTPUT_FILENAME = filename

p = pyaudio.PyAudio()
stream = p.open(format=FORMAT, channels=CHANNELS, rate=RATE, input=True, frames_per_buffer=CHUNK)

print("Recording...")
frames = []

for _ in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
data = stream.read(CHUNK)
frames.append(data)

print("Recording finished.")
stream.stop_stream()
stream.close()
p.terminate()

with wave.open(WAVE_OUTPUT_FILENAME, 'wb') as wf:
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(b''.join(frames))

# Function to upload audio file to AssemblyAI
def upload_audio(filename):
with open(filename, 'rb') as f:
print("Uploading audio...")
response = requests.post(UPLOAD_ENDPOINT, headers={'authorization': ASSEMBLYAI_API_KEY}, data=f)
if response.status_code == 200:
upload_url = response.json()['upload_url']
print("Upload successful.")
return upload_url
else:
print(f"Upload failed: {response.status_code} {response.text}")
return None

# Function to request transcription from AssemblyAI
def request_transcription(upload_url):
json_data = {
'audio_url': upload_url
}
response = requests.post(TRANSCRIPT_ENDPOINT, json=json_data, headers=headers_auth)
if response.status_code == 200:
transcript_id = response.json()['id']
print(f"Transcription requested. ID: {transcript_id}")
return transcript_id
else:
print(f"Transcription request failed: {response.status_code} {response.text}")
return None

# Function to poll transcription result
def poll_transcription(transcript_id, timeout=60, poll_interval=3):
polling_endpoint = f"{TRANSCRIPT_ENDPOINT}/{transcript_id}"
print("Polling for transcription result...")
start_time = time.time()
while True:
response = requests.get(polling_endpoint, headers=headers_auth)
if response.status_code != 200:
print(f"Polling error: {response.status_code} {response.text}")
return None

result = response.json()
status = result['status']
if status == 'completed':
print("Transcription completed.")
return result.get('text', '')
elif status == 'error':
print(f"Transcription error: {result.get('error', 'Unknown error')}")
return None
else:
# still processing
if time.time() - start_time > timeout:
print("Transcription polling timed out.")
return None
time.sleep(poll_interval)

# Function to print the transcript
def print_transcript(transcript):
if transcript:
print(transcript)
else:
print("No transcription available.")
os.remove(nameoffile) # Clean up the audio file after transcription

def main():
audio_filename = generate_random_filename("wav")
record_audio(audio_filename, duration=5)

upload_url = upload_audio(audio_filename)
if not upload_url:
return

transcript_id = request_transcription(upload_url)
if not transcript_id:
return

transcript = poll_transcription(transcript_id)
print_transcript(transcript)
ser.write((transcript + '\n').encode('utf-8'))
ser.flush()
time.sleep(1) # Give some time for the Arduino to process the data

if __name__ == "__main__":
while True:
main()


it is not sending it at all it is not about the lcd because i tried Serial.println instead of lcd.print and it still didnt work

Im using windows and ive checked the com3 to be true and i never get an error message from python it just doesnt send the string

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