Automate WhatsApp Sales with DeepSeek AI, Google Sheets and Gmail Notifications

Turn WhatsApp Into a 24/7 AI Sales Assistant — n8n + DeepSeek + Sheets + Gmail

⚠️ Self-Hosted n8n Only

Description

Turn your WhatsApp channel into a smart sales assistant! This workflow listens for inbound customer messages, looks up product data in Google Sheets, uses a DeepSeek Chat Model to answer in Saudi dialect, collects purchase details, and notifies your service rep only when the customer is ready to buy.

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🔧 How to Install Community Nodes

Go to Settings → Community Nodes
Click Install Node, then add:

n8n-nodes-evolution-api

Restart n8n if prompted.

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🔄 What This Workflow Does

1. Webhook Listener
   Captures inbound WhatsApp messages (MESSAGES_UPSERT via Evolution API).
2. Filters
   Ignores outbound (fromMe) and group (@g.us) messages.
3. Data Extraction
   Pulls the customer’s message and phone number.
4. AI Response
   Uses the DeepSeek Chat Model node to answer from your Google Sheets product list, greeting with “هلا وغلا” and speaking in Saudi dialect.
5. Purchase Flow
   Prompts for name, phone, and delivery/pickup date.
6. Notify Sales
   Sends an email via Gmail only when the customer requests to purchase.
7. Context Memory
   (Optional) Stores conversation history in Postgres for coherent multi-turn chats.

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📸 Visual Preview

🧩 Workflow

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🛠️ Setup Instructions

1. Evolution API Webhook

   • In Evolution API dashboard → Events → Webhook
   • Enable only MESSAGES_UPSERT
   • Set Webhook URL to:
     https://your-n8n-domain/webhook/whatsAppListen

2. Google Sheets

   • Create a spreadsheet (“You Conmanay Name Items”) with your product data [Item name, Item Model, Item Description, Item Components, Item Price, Item Availability, ...]
   • Connect your Google Sheets credentials in n8n

3. DeepSeek Chat Model

   • Configure your DeepSeek API credentials in the DeepSeek Chat Model node
   • Ensure the system prompt matches your company’s tone and data columns

4. Gmail Notifications

   • Add Gmail OAuth2 credentials to the Send a message in Gmail node
   • Customize subject and email template if needed

5. Postgres Memory (Optional)

   • Connect a Postgres instance in the Postgres Chat Memory node for session context

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👥 Who Is This For?

• E-commerce teams automating first-touch customer replies
• Sales reps needing AI-driven chat support on WhatsApp
• Businesses using WhatsApp as a primary customer channel

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🔐 Credentials Required

• Evolution API (webhook only)
• Google Sheets API
• DeepSeek API
• Gmail OAuth2
• Postgres (optional, for memory)

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🏷 Tags

whatsapp bot, deepseek, google sheets, evolution api, gmail, postgres memory, ecommerce, sales automation, n8n template, no-code, ai, agent, ai agent