Schedule golf course irrigation with Open-Meteo, GPT-4o-mini, and Telegram

by Swapnil Mandloi ✓ · 2 views · created 2026-09-29 · Engineering, AI Summarization

What this workflow does

This AI workflow has 18 nodes and runs when an HTTP POST request hits its webhook URL. Along the way it connects OpenAI Chat Model and Telegram. It also calls api.open-meteo.com and irrigation-controller.internal.golfclub.example over HTTP.

How it runs

Trigger: When an HTTP POST request hits its webhook URL.

1. Fetch Today's Weather Forecast (HTTP Request): calls api.open-meteo.com
2. Split Zones Into Individual Items (Split Out): splits a list into separate items
3. Compute Soil Moisture Deficit (Code): runs custom JavaScript code
4. Recent Pesticide Application? (If): checks a condition and branches into true / false
5. Extract REI & Buffer Requirements (Information Extractor): extracts structured fields from text with AI, with model: GPT-4o-mini for Label Extraction
6. Merge: merges the data from its input branches
7. Determine Zone Still Restricted (Code): runs custom JavaScript code
8. Is Zone Restricted? (If): checks a condition and branches into true / false
9. Flag Zone Skip Irrigation (Edit Fields (Set)): sets 2 fields: irrigation_minutes, skip_reason
10. Compute Irrigation Run Minutes (Edit Fields (Set)): sets 2 fields: irrigation_minutes, skip_reason

…plus 6 more steps. See the full node list below.

Services it uses

OpenAI Chat ModelTelegram

HTTP calls to: api.open-meteo.com, irrigation-controller.internal.golfclub.example

Before you upgrade to n8n 3.0

Nodes used (11)

• Webhookn8n-nodes-base.webhook
• HTTP Requestn8n-nodes-base.httpRequest
• Split Outn8n-nodes-base.splitOut
• Coden8n-nodes-base.code
• Ifn8n-nodes-base.if
• OpenAI Chat Model@n8n/n8n-nodes-langchain.lmChatOpenAi
• Information Extractor@n8n/n8n-nodes-langchain.informationExtractor
• Mergen8n-nodes-base.merge
• Edit Fields (Set)n8n-nodes-base.set
• Aggregaten8n-nodes-base.aggregate
• Telegramn8n-nodes-base.telegram

From the author

Quick overview This workflow receives a daily batch of golf course zone sensor readings, pulls a forecast from Open-Meteo, calculates per-zone irrigation runtimes, checks pesticide-label REI and water-hazard buffer rules with OpenAI, then posts the final…

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