Add application file

Dockerfile

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+FROM python:3.9-slim
+
+WORKDIR /app
+
+# ffmpeg install karo — pydub ke liye zaroori
+RUN apt-get update && apt-get install -y ffmpeg && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app.py ./
+
+EXPOSE 7860
+ENV FLASK_APP=app.py
+
+CMD ["python", "app.py"]

app.py

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+from flask import Flask, request, send_file
+import os
+from gtts import gTTS
+from pydub import AudioSegment
+
+app = Flask(__name__)
+
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+TMP_DIR  = os.path.join(BASE_DIR, "tts_tmp")
+os.makedirs(TMP_DIR, exist_ok=True)
+
+
+def text_to_wav(text, lang, wav_path):
+    mp3_path = os.path.join(TMP_DIR, "temp.mp3")
+
+    # gTTS se MP3
+    tts = gTTS(text, lang=lang)
+    tts.save(mp3_path)
+    print(f"[gTTS] MP3 ready")
+
+    # pydub se convert — 44100Hz, Stereo, 16-bit (original jaisa exactly)
+    audio = AudioSegment.from_mp3(mp3_path)
+    audio = audio.set_frame_rate(44100).set_channels(2).set_sample_width(2)
+    audio.export(wav_path, format="wav")
+    print(f"[WAV] 44100Hz Stereo 16-bit ready")
+
+    if os.path.exists(mp3_path):
+        os.remove(mp3_path)
+
+    return wav_path
+
+
+@app.route("/tts", methods=["GET"])
+def tts_get():
+    text = request.args.get("text", "Hello")
+    lang = request.args.get("lang", "en")
+    print(f"\n[TTS] Text: \"{text}\" | Lang: {lang}")
+
+    wav_path = os.path.join(TMP_DIR, "response.wav")
+    try:
+        text_to_wav(text, lang, wav_path)
+    except Exception as e:
+        print(f"[ERROR] {e}")
+        return f"Error: {e}", 500
+
+    return send_file(wav_path, mimetype="audio/wav")
+
+
+@app.route("/tts", methods=["POST"])
+def tts_post():
+    data = request.get_json(silent=True) or {}
+    text = data.get("text", "Hello")
+    lang = data.get("lang", "en")
+    print(f"\n[TTS] Text: \"{text}\" | Lang: {lang}")
+
+    wav_path = os.path.join(TMP_DIR, "response.wav")
+    try:
+        text_to_wav(text, lang, wav_path)
+    except Exception as e:
+        print(f"[ERROR] {e}")
+        return f"Error: {e}", 500
+
+    return send_file(wav_path, mimetype="audio/wav")
+
+
+@app.route("/ping")
+def ping():
+    return {"status": "ok", "server": "ESP32 TTS Server"}
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=7860, debug=False)

requirements.txt

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+flask
+gtts
+pydub