WhatsApp Gemini Chatbot

Overview

WhatsApp Gemini Chatbot is an n8n workflow that transforms a WhatsApp number into a customizable AI chatbot powered by Google Gemini and WAHA (WhatsApp HTTP API). The chatbot’s personality and behavior can be tailored using a Google Sheets document, allowing users to define how the chatbot responds to various prompts.

WhatsApp Gemini Chatbot n8n Workflow Overview (V1)

The workflow integrates several key components:

• WAHA (WhatsApp HTTP API): A service that enables sending and receiving WhatsApp messages via HTTP requests using a user-provided WhatsApp number. Bypasses WhatsApp Business API restrictions.
• Google Gemini: Google’s advanced AI language model used to generate responses based on user prompts and the defined personality. Models range from Gemini 2.0 to Gemini 3 Pro as well as Nano Banana Pro can be selected according to user needs.
• Google Sheets: A spreadsheet that allows users to customize the chatbot’s personality by defining specific prompts and corresponding responses. This enables a wide range of chatbot behaviors, from professional assistants to casual conversationalists.

Persona Configuration

Persona customization is achieved through a Google Sheets document where users can define various prompts and their associated responses. The n8n workflow retrieves this data to shape the chatbot’s interactions.

A sample configuration might look like this:

Google Sheets Persona Configuration Example

In this example, the chatbot is configured to respond as “Charlie Morningstar”, a character from the “Hazbin Hotel” series, who is known for her cheerful and optimistic personality.

Charlie Morningstar from Hazbin Hotel

Hardware Requirements

The current version of the workflow (V1) is deployed locally on Orange Pi 3B with the following system specifications:

Orange Pi 3B System Specifications

It can also be deployed on other hardware platforms that support n8n, such as Raspberry Pi or cloud-based servers.

Results

WhatsApp Screenshot showing interaction with Gemini Chatbot, Charlie Morningstar persona