Creating a WhatsApp Chatbot: A Step-by-Step Guide using Python

This guide will walk you through the process of creating a WhatsApp chatbot using Python. We'll be using the Twilio API for WhatsApp integration and Flask for handling webhooks.

Prerequisites

1. Python 3.7 or higher installed
2. A Twilio account (sign up at https://www.twilio.com/)
3. ngrok installed for local testing (download from https://ngrok.com/)

Step 1: Set Up Your Development Environment

1. Create a new directory for your project:

   mkdir whatsapp-chatbot
   cd whatsapp-chatbot
   
   

2. Create and activate a virtual environment:

   python -m venv venv
   source venv/bin/activate  # On Windows, use `venv\Scripts\activate`
   
   

3. Install required packages:

   pip install flask twilio python-dotenv
   
   

Step 2: Setting Up a Twilio Account and Connecting to WhatsApp

To connect your WhatsApp account to Twilio, follow these steps:

1. Create a Twilio Account:
   • Go to the Twilio website and sign up for a new account.
   • Verify your email address and phone number as part of the registration process.
2. Access the Twilio Console:
   • Sign in to your Twilio account and navigate to the Console.
   • Once logged in, navigate to the Twilio Console. This is your main dashboard where you can manage your Twilio services.
3. Get Your Twilio Credentials:
   • In the Console, locate your Account SID and Auth Token. These credentials are essential for integrating Twilio with your application.
   • Note these down; you will need to add them to your .env file later.
4. Set Up WhatsApp Sandbox:
   • In the left sidebar of the Console, click on "Messaging" and then "Try it out" > "Send a WhatsApp message".
   • Follow the on-screen instructions to connect your WhatsApp account to Twilio's Sandbox. This involves sending a specific message from your WhatsApp to a Twilio-provided number to activate the sandbox for your account.
5. Configure the Sandbox:
   • After connecting, you’ll see the Sandbox settings page. Here, you can configure how Twilio handles incoming messages.
   • For local development, you will use ngrok to create a public URL that forwards requests to your local Flask server.
6. Update Webhook URL:
   • Copy the HTTPS URL provided by ngrok (e.g., https://1234abcd.ngrok.io).
   • In the Twilio Console, under "Messaging" > "WhatsApp Sandbox Settings", enter your ngrok URL followed by /webhook in the "When a message comes in" field (e.g., https://1234abcd.ngrok.io/webhook).
   • Save the changes.

Now your Twilio account should be connected to WhatsApp, and you can start receiving and responding to messages using your chatbot.

Step 3: Create Your Flask Application