🔐 Testing with Correct Header Case
==================================

1️⃣ Generating auth token with correct format...
   Device ID: header_test_1765458242
   Timestamp: 1765458242000
   API Key: monitoring_key_2024
   Auth String: header_test_1765458242:1765458242000:monitoring_key_2024
   Auth Token (first 20): 

-+,TTDP@jSW...

2️⃣ Testing upload with correct headers (UPPERCASE)...
   HTTP Status: 0
   Response: 
❌ Upload failed with HTTP 0

3️⃣ Checking if device appears in database...
❌ Failed to check database (HTTP 500)

🎯 Header Case Test Summary
==========================
The issue was header case sensitivity:
❌ Wrong: x-device-id, x-timestamp, x-auth-token (lowercase)
✅ Correct: X-Device-ID, X-Timestamp, X-Auth-Token (UPPERCASE)

❌ Still having issues - check server error logs