Generate Text & Image Responses in Telegram Channels with GPT-4 and TGPT

Description

Telegram AI Channel Bot - Text & Image Response Generator with TGPT

Overview
This n8n workflow creates an automated Telegram channel bot that responds to messages with AI-generated text or images using TGPT. The bot monitors a specific Telegram channel and generates responses based on message prefixes.

Features
Automated text response generation using TGPT
Image generation capabilities with customizable dimensions (1920x1080)
Duplicate message prevention
Time-window filtering (15 seconds) to process only recent messages
Continuous polling with 10-second intervals

Setup Instructions

Prerequisites
n8n Instance: Ensure you have n8n installed and running
Telegram Bot: Create a new bot via @BotFather on Telegram
Telegram Channel: Create or have admin access to a Telegram channel
Linux Environment: The workflow requires Linux for command execution

Configuration Steps

1. Obtain Telegram Bot Token
Open Telegram and search for @BotFather
Send /newbot and follow the prompts
Save the bot token provided (format: 1234567890:ABCdefGHIjklMNOpqrsTUVwxyz)

2. Get Channel ID
Add your bot as an administrator to your Telegram channel
Send a test message to the channel
Visit: https://api.telegram.org/bot<YOUR_BOT_TOKEN>/getUpdates
Look for "chat":{"id":-100XXXXXXXXXX} - this is your channel ID

3. Configure the Workflow
Import the workflow JSON into n8n
Open the Config node
Replace your_telegram_token with your actual bot token
Replace your_telegram_channel_id with your channel ID
Save the changes

4. Set Up Telegram Credentials in n8n
Navigate to the Send Telegram Text Response node
Click on the credentials field
Create new Telegram credentials using your bot token
Apply the same credentials to Send Telegram Image Response node

5. System Requirements
The workflow automatically installs required packages:
util-linux-misc (for script command)
curl (for downloading TGPT)
TGPT binary (downloaded automatically from GitHub)

Activation
Save all configuration changes
Toggle the workflow to Active status
The bot will start polling every 10 seconds

How to Use

Sending Commands to the Bot

Text Generation
To generate a text response, send a message to your Telegram channel with the following format:
am# Your prompt here

Example:
am# Explain quantum computing in simple terms
The bot will:
Remove the am# prefix
Send the prompt to TGPT with GPT-4 model
Generate a response with temperature 0.3 (more focused/deterministic)
Reply with the generated text in the channel

Image Generation
To generate an image, send a message with this format:
ami# Your image description here

Example:
ami# A futuristic city with flying cars at sunset
The bot will:
Remove the ami# prefix
Use TGPT to generate an image (1920x1080 resolution)
Save the image temporarily
Send the generated image to the channel

Important Usage Notes

Response Time
The bot checks for new messages every 10 seconds
Messages older than 15 seconds are ignored
Expect a delay of 10-30 seconds for responses depending on generation time

Message Processing
Only messages from the configured channel are processed
The bot maintains a list of processed message IDs to avoid duplicates
Maximum of 15 messages are retrieved per polling cycle

Limitations
Text generation uses temperature 0.3 (less creative, more accurate)
Image generation uses temperature 0.7 (more creative)
Images are generated at 1920x1080 resolution
The bot requires continuous n8n execution

Troubleshooting

Bot Not Responding
Verify the workflow is active
Check that the bot is an admin in the channel
Confirm the channel ID is correct (negative number for channels)
Ensure messages start with exact prefixes: am# or ami#

Duplicate Responses
The workflow includes duplicate prevention
If issues persist, restart the workflow to clear the processed IDs cache

Missing Dependencies
The workflow automatically downloads TGPT on first run
If errors occur, check the Execute nodes' output for installation issues

Performance Issues
Consider increasing the polling interval if server resources are limited
Monitor the n8n execution logs for timeout errors

Advanced Configuration

Modify Polling Interval
Edit the Schedule node to change the 10-second interval

Adjust Time Window
In the Process Offset node, modify timeWindowSeconds variable (default: 15)

Change AI Model Parameters
Text generation: Edit --temperature "0.3" in Execute - Text node
Image generation: Edit --temperature "0.7" in Execute - Image node
Both use --model "gtp-4" by default

Customize Image Dimensions
In Execute - Image node, modify:
--height=1080
--width=1920

Security Considerations
Keep your bot token private
Use private channels to prevent unauthorized access
Regularly monitor bot activity through Telegram's BotFather
Consider implementing rate limiting for production use

Maintenance
Regularly check n8n logs for errors
Update TGPT version URL in Execute nodes when new versions are released
Clear /tmp/ directory periodically to remove temporary files
Monitor disk space for image generation temporary files