What This Automation Does
This workflow listens to Telegram messages, both voice notes and texts.
It changes voice notes into text using AI transcription.
Then, it reads the message to understand what task to do in Google Tasks.
It can create new tasks, update old ones, or mark tasks done.
Finally, it replies on Telegram telling what was done.
This saves hours of typing and stops mistakes in tasks.
Tools and Services Used
- Telegram Bot API: Receives user messages.
- OpenAI API: Transcribes audio and understands commands.
- Google Tasks API: Manages task creation, update, and completion.
- n8n Workflow Automation: Connects all steps in sequence.
Inputs, Processing, and Outputs
Inputs
The workflow starts with new Telegram messages.
Messages can be voice notes or text.
Processing Steps
- Identify if the message is a voice note or text.
- If voice note, download the file, and send it to OpenAI to turn into text.
- Prepare a consistent text input from either transcription or text message.
- Keep recent chat history for context with a Simple Memory node.
- Use AI Agent node to read the input and decide the right task action.
- Call Google Tasks nodes to create, update, or complete tasks as needed.
- Format a response message and send it back through Telegram.
Outputs
New or updated tasks in Google Tasks lists and confirmation messages sent back to Telegram chats.
Beginner Step-by-step: How to Use This Workflow in n8n
Import the Workflow
- Download the workflow file using the Download button on this page.
- Open n8n editor and select Import from File.
- Upload the downloaded file to import the workflow.
Configure Credentials and IDs
- Add Telegram Bot API credentials in the Telegram nodes.
- Insert your OpenAI API key for transcription and AI Agent nodes.
- Add Google Tasks OAuth2 credentials for task nodes.
- Update task list IDs or any user IDs if needed for your setup.
Test and Activate
- Run the workflow once with a test message to check correctness.
- Look for correct transcription, task creation or update, and Telegram reply.
- If all works, turn the workflow ON to run in production.
- Ensure your n8n instance stays online to catch new Telegram messages.
For better uptime and control, consider self-host n8n.
Customization Ideas
- Change the Google Task list IDs to organize tasks for different teams or projects.
- Increase Simple Memory node’s window size to keep longer chat history for smarter answers.
- Add handling for other Telegram content like pictures or documents in the Switch node.
- Edit AI Agent system prompt to add priority, deadlines or special instructions for tasks.
Common Problems and Fixes
- Telegram does not trigger the workflow.
Bot might not be added to the chat or webhook URL in Telegram Bot settings may be wrong. - Audio transcription fails or returns empty text.
OpenAI API key might be wrong or audio file not downloaded properly. - Google Tasks do not update.
OAuth2 token might have expired or invalid task ID used for update.
Pre-Production Checklist
- Check Telegram Bot has permissions to read and send messages.
- Test voice note transcription accuracy with example audio.
- Confirm AI Agent understanding with sample commands and replies.
- Verify Google Tasks nodes can get, add, update, and complete tasks with OAuth.
- Send multiple message types on Telegram to test full workflow actions.
Deployment Guide
Enable the workflow in n8n once testing is complete.
Make sure your n8n server stays running to handle incoming Telegram messages silently.
Watch execution logs for errors during transcription or Google Tasks API calls.
Set alert systems to warn on failed runs if possible.
Summary
✓ Saves over 5 hours weekly by automating task handling from Telegram.
✓ Avoids manual mistakes in typing and task updates.
✓ Transcribes voice notes to text for easier command processing.
✓ Updates Google Tasks lists accurately without extra effort.
✓ Sends friendly Telegram replies to confirm user requests were done.