📱 WhatsApp Message Delivery Troubleshooting

🔍 Why Some Messages Don't Deliver (Even When API Shows Success)

📋 WhatsApp Business API Rules:

24-Hour Window: You can only send free-form messages within 24 hours after a user messages you first
Template Messages: For first contact or after 24-hour window, you must use approved template messages
Opt-in Required: Users must have opted in to receive messages from your business
Valid WhatsApp Number: The phone number must be registered with WhatsApp

🛠️ Solutions:

For First Contact: Use template messages first

curl -X POST http://127.0.0.1:8000/send-template \
  -H "Content-Type: application/json" \
  -d '{"to": "+2349025794407"}'

Ask Users to Message First: Have users send "Hi" to your WhatsApp Business number
Check Message Window: Send messages within 24 hours of user's last message
Use Enhanced Logging: Check console for detailed error messages

📊 Test Your Numbers:

Working: +2348144493361 (likely messaged you first)

Not Working: +2349025794407 (needs template message first)

🔗 Useful Endpoints:

Enhanced Chat Interface
POST /send-template - Send template message for first contact
POST /send - Send regular message (24-hour window required)

🎯 Quick Fix for Your Current Issue:

For +2349025794407 to receive messages:

Ask them to send "Hi" to your WhatsApp Business number: +234 837 445 0627
Wait for them to message you first
Then you can send regular messages for 24 hours

💡 Tip: Always ask new contacts to message your business number first. This is how WhatsApp Business API works!