Estimate meal calories from Telegram text and photos with Google Gemini
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 14 nodes and runs on Telegram events (message). Along the way it connects Telegram, Google Gemini Chat Model and Google Gemini.
How it runs
Trigger: On Telegram events (message).
- Set User ID Field (Edit Fields (Set)): sets 1 field: id
- If: checks a condition and branches into true / false
- Route by Message Type (Switch): routes items into 4 branches
- Respond Unauthorized User (Telegram): uses Telegram
- Download Meal Image from Telegram (Telegram): work with file
- Aggregate: combines items into one
- Notify Unsupported Message (Telegram): uses Telegram
- Analyze Image for Calories (Google Gemini): analyze (image)
- Calorie Estimation Agent (AI Agent): runs an AI agent, with model: Gemini Chat Model for Queries; 1 tool (Calculate Nutritional Values); memory: Track Conversation History
- Respond to User on Telegram (Telegram): uses Telegram
Services it uses
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (11)
- If
n8n-nodes-base.if - Edit Fields (Set)
n8n-nodes-base.set - Switch
n8n-nodes-base.switch - Telegram Trigger
n8n-nodes-base.telegramTrigger - AI Agent
@n8n/n8n-nodes-langchain.agent - Google Gemini Chat Model
@n8n/n8n-nodes-langchain.lmChatGoogleGemini - Simple Memory
@n8n/n8n-nodes-langchain.memoryBufferWindow - Telegram
n8n-nodes-base.telegram - Google Gemini
@n8n/n8n-nodes-langchain.googleGemini - Aggregate
n8n-nodes-base.aggregate - Calculator
@n8n/n8n-nodes-langchain.toolCalculator
From the author
Quick overview This Telegram bot workflow lets an authorized user send meal details as text or a photo, uses Google Gemini to describe images, then uses an n8n AI Agent to estimate calories and replies in Telegram. How it works 1. Triggers when your Telegram…