Voice & Text Control for Home Assistant using Telegram, Whisper & Gemini

📝 Workflow Description

This workflow creates a conversational bridge between Telegram / n8n Chat and Home Assistant.
It allows users to control smart home devices or request information using natural language (text or voice).

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🔑 Key Features

• Multi-channel input: Works with both Telegram and n8n’s chat interface.
• Voice support: Telegram voice messages are transcribed to text using OpenAI Whisper.
• AI-driven assistant: Google Gemini processes queries in natural language.
• Home Assistant integration: Uses MCP client tools to execute actions like turning devices on/off, adjusting lights, or broadcasting messages.
• Memory management: Short-term memory keeps context within conversations.
• Smart reply routing: Responses are automatically sent back to the correct channel (Telegram or chat).
• Message formatting: Telegram replies are beautified (bold, bullet points, inline code, links).

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📌 Node Overview

• Telegram Trigger: Captures incoming Telegram messages (text or voice).
• Bot Is Typing: Sends a “typing…” action to indicate the bot is working.
• Voice or Text: Separates voice and text inputs.
• Get Voice File → Speech to Text → Transcription to ChatInput: Handles Telegram voice notes by downloading the file, transcribing it, and preparing it for the chat pipeline.
• When Chat Message Received: Captures messages from n8n’s built-in chat interface.
• Process Messages: Normalizes incoming data (input text, source, session ID, voice flag).
• Home Agent: Main AI agent that processes queries.
• Google Gemini Chat Model: Language model for intent understanding and conversation.
• Simple Memory & Simple Memory1: Buffer memories to preserve conversation context.
• Home Assistant Connector: MCP client node that executes smart home actions (turn on/off devices, adjust lights, etc.).
• Reply Router: Routes the assistant’s response either to Telegram or to the n8n chat webhook.
• Telegram Message Beautifier → Telegram Send: Formats and sends responses back to Telegram.
• Respond to Webhook: Sends responses to n8n chat.

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🚀 Example Use Cases

• Send “Turn on the living room lights” via Telegram → Bot triggers Home Assistant action.
• Ask “What’s the temperature in the bedroom?” → Response comes back formatted in Telegram.
• Record a voice note “Goodnight mode” → Automatically transcribed and executed by Home Assistant.
• Use n8n chat to quickly trigger automations or check device statuses.

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⚡️ Benefits

• Unified chat & voice control for Home Assistant.
• AI-powered natural language understanding.
• Works seamlessly across platforms (Telegram & n8n chat).
• Extensible: new tools or intents can be added easily.