WhatsApp AI Sales Chatbot for Yamaha Speakers (n8n + OpenAI)

Sell Yamaha Powered Loudspeakers faster with a WhatsApp AI sales chatbot built in n8n (OpenAI + vector search)

This n8n workflow turns a 2024 Yamaha Powered Loudspeakers PDF brochure into an AI-powered WhatsApp chatbot. When customers message you on WhatsApp, the bot uses OpenAI and a searchable in-memory vector store to retrieve relevant brochure passages and reply with accurate answers—right inside WhatsApp.

What this workflow does

• Builds a searchable product knowledge base: On Test workflow, it downloads the Yamaha 2024 brochure via HTTP, extracts text, splits it into chunks, generates OpenAI embeddings, and stores them in an n8n In-Memory Vector Store.
• Responds to WhatsApp messages with AI: When a WhatsApp message arrives, it checks the incoming message type.
• Handles non-text correctly: If the user sends anything other than text, it replies asking the user to send only text.
• Answers using retrieval + generation: For text messages, an OpenAI-powered agent uses per-sender chat memory and queries the vector store tool to find relevant brochure content, then sends the generated answer back via WhatsApp.
• Refreshes knowledge when needed: Re-run the manual test path whenever the brochure URL/content changes.

Use cases

• WhatsApp inquiries about specs, features, and product details from the Yamaha Powered Loudspeakers 2024 brochure.
• Pre-sales Q&A for SaaS operators using n8n to automate lead handling through WhatsApp.
• Reducing repetitive support work for teams selling Yamaha speakers—without leaving the chat.

Technical details

• n8n workflow components: WhatsApp Trigger, WhatsApp send credentials, Switch, HTTP Request, Manual Trigger, In-Memory Vector Store, and a LangChain n8nn8n-nodes-langchainagent agent.
• AI services: OpenAI embeddings and an OpenAI chat model via the agent.
• Operational setup: Configure the WhatsApp Cloud API webhook with the trigger URL and confirm the Phone Number ID used for replies.