Prerequisites

• Twilio Account: Sign up for Twilio.
• Google Cloud Account: Sign up for Google Cloud.

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Step 1: Twilio WhatsApp Sandbox Setup

1.1 Join the Twilio Sandbox

1. Log in to the Twilio Console: Go to Twilio Console.
2. Navigate to the WhatsApp Sandbox:
   • In the Console, go to "Messaging".
   • Click on "Try it out" under "Send a WhatsApp message".
3. Join the Sandbox:
   • Follow the instructions to join the sandbox using the provided code and Twilio sandbox number.

1.2 Configure Webhook URL

1. Set the Webhook URL:
   • In the Twilio Console, under "Sandbox Configuration", set the "When a message comes in" webhook URL to your server endpoint (e.g., http://your-ngrok-url.ngrok.io/whatsapp).

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Step 2: Google Dialogflow Setup

2.1 Create a Dialogflow Agent

1. Create a New Agent:
   • Go to the Dialogflow Console.
   • Create a new agent.

2.2 Enable Dialogflow API and Create Service Account

1. Enable the API:
   • Go to the Google Cloud Console.
   • Select your project and enable the Dialogflow API.
2. Create a Service Account:
   • Go to "IAM & Admin" > "Service Accounts".
   • Create a new service account with the roles Dialogflow API Client and Dialogflow API Admin.
   • Generate a JSON key file and download it.

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Step 3: Set Up Your Server

3.1 Install Dependencies

npm install express twilio body-parser dialogflow

3.2 Install Dependencies

1. Download service key fron google cloud and paste it in the root folder
2. create API_KEYS.js file and add all the keys

Step 4: Expose Your Server Using ngrok

4.1 Install and Run ngrok

1. Download ngrok: ngrok Download Page.
2. Run ngrok:

   ngrok http 3000

3. Copy the ngrok URL: Copy the forwarding URL provided by ngrok (e.g., http://abcdef1234.ngrok.io).

4.2 Configure Webhook URL in Twilio Console

1. Set the Webhook URL:
   • In the Twilio Console, update the "When a message comes in" URL to the ngrok URL followed by /whatsapp (e.g., http://abcdef1234.ngrok.io/whatsapp).

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Step 5: Test Your Chatbot

1. Start Your Server:

   node server.js

2. Send a WhatsApp Message:

   • Send a message to the Twilio sandbox number from your WhatsApp.

3. Verify the Response:

   • Ensure that your server processes the message, communicates with Dialogflow, and sends back an appropriate response.

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