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diff --git a/proof_of_concept/telegram_keyboard_buttons.py b/proof_of_concept/telegram_keyboard_buttons.py
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+++ b/proof_of_concept/telegram_keyboard_buttons.py
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+'''
+Proof of concept to send messages to bot, and get reply using keyboard buttons.
+
+Based on:
+https://docs.python-telegram-bot.org/en/stable/examples.inlinekeyboard.html
+and a bit of:
+https://docs.python-telegram-bot.org/en/stable/examples.echobot.html
+'''
+
+
+import logging
+
+import yaml
+from telegram import InlineKeyboardButton, ReplyKeyboardMarkup, Update
+
+from telegram.ext import (
+    Application,
+    CommandHandler,
+    ContextTypes,
+    MessageHandler,
+    filters,
+)
+
+logging.basicConfig(format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO)
+# set higher logging level for httpx to avoid all GET and POST requests being logged
+logging.getLogger("httpx").setLevel(logging.WARNING)
+logger = logging.getLogger(__name__)
+
+
+async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
+    """Send message on `/start`."""
+
+    # Get user that sent /start and log their name
+    user = update.message.from_user
+    logger.info("User %s started the conversation.", user.first_name)
+
+    # Build InlineKeyboard where each button has a displayed text
+    # and a string as callback_data
+
+    # The keyboard is a list of button rows, where each row is in turn
+
+    # a list (hence `[[...]]`).
+
+    keyboard = [
+        [
+            InlineKeyboardButton("/1", callback_data='/2'),
+            InlineKeyboardButton("/2", callback_data='/2'),
+        ]
+    ]
+
+    reply_markup = ReplyKeyboardMarkup(keyboard)
+
+    # Send message with text and appended InlineKeyboard
+
+    await update.message.reply_text("Start handler, Choose a route", reply_markup=reply_markup)
+
+    # Tell ConversationHandler that we're in state `FIRST` now
+
+    return None
+
+
+async def one(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
+    """Send a message when the command /1 is issued."""
+
+    await update.message.reply_text("First")
+
+
+async def two(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
+    """Send a message when the command /2 is issued."""
+
+    await update.message.reply_text("Second")
+
+
+def main() -> None:
+    """Run the bot."""
+
+    # Create the Application and pass it your bot's token.
+    with open("src/config.yml", "r") as file:
+        config = yaml.safe_load(file)
+
+    application = Application.builder().token(config["telegram"]["token"]).build()
+
+    # Add command handlers
+    application.add_handler(CommandHandler("1", one))
+    application.add_handler(CommandHandler("2", two))
+    # Everything except the commands match start
+    application.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, start))
+    # Run the bot until the user presses Ctrl-C
+
+    application.run_polling(allowed_updates=Update.ALL_TYPES)
+
+
+if __name__ == "__main__":
+    main()