Implement dual logging workflow: noconfig vs configured mode

NOCONFIG MODE (device not configured):
- Sends 'App initialized' message on startup
- Sends 'RFID initialized' message after RFID ready
- Sends 'App working' message on startup
- Sends periodic 'App working' health status every 5 minutes
- Card inserted/removed events sent directly to monitoring server

CONFIGURED MODE (table ID set):
- Sends 'App initialized' and startup messages
- Card events POST to Harting API first
- Only sends to monitoring server on successful API post
- Failed posts saved to tag.txt backup file
- Backup data sent with summary when internet restored

Changes:
- Added send_health_status() function for periodic monitoring
- Updated process_card_events() to handle both workflows
- Updated main() to send startup messages and start health monitor
- Improved monitoring server URL to use rpi-ansible hostname
- Added retry logic for monitoring server requests

test_monitoring_server.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+"""
+Test script to verify connection to monitoring server
+"""
+
+import requests
+import socket
+import sys
+
+# Configuration
+MONITORING_SERVER = "http://rpi-ansible:80/logs"
+
+def test_connection():
+    """Test if monitoring server is reachable"""
+    print(f"Testing connection to: {MONITORING_SERVER}\n")
+    
+    # Get local info
+    try:
+        hostname = socket.gethostname()
+        device_ip = socket.gethostbyname(hostname)
+        print(f"Local hostname: {hostname}")
+        print(f"Local IP: {device_ip}\n")
+    except Exception as e:
+        print(f"Error getting local info: {e}\n")
+        hostname = "unknown"
+        device_ip = "0.0.0.0"
+    
+    # Test 1: Simple GET request
+    print("1. Testing simple GET request...")
+    try:
+        response = requests.get(MONITORING_SERVER, timeout=5)
+        print(f"   ✓ GET successful (Status: {response.status_code})")
+        print(f"   Response: {response.text[:200]}\n")
+    except Exception as e:
+        print(f"   ✗ GET failed: {e}\n")
+    
+    # Test 2: POST with test data
+    print("2. Testing POST with test data...")
+    try:
+        test_data = {
+            "hostname": hostname,
+            "device_ip": device_ip,
+            "nume_masa": "TEST_STATION",
+            "log_message": "Test message from client"
+        }
+        print(f"   Payload: {test_data}")
+        response = requests.post(MONITORING_SERVER, json=test_data, timeout=5)
+        print(f"   ✓ POST successful (Status: {response.status_code})")
+        print(f"   Response: {response.text}\n")
+    except requests.exceptions.ConnectionError as e:
+        print(f"   ✗ Connection error: {e}")
+        print(f"   - Server may be unreachable at {MONITORING_SERVER}\n")
+    except requests.exceptions.Timeout:
+        print(f"   ✗ Request timeout (5s)")
+        print(f"   - Server may be offline or slow\n")
+    except Exception as e:
+        print(f"   ✗ POST failed: {e}\n")
+    
+    # Test 3: Ping server IP
+    print("3. Testing network connectivity to server...")
+    import subprocess
+    try:
+        server_ip = "192.168.1.103"
+        result = subprocess.run(
+            ["ping", "-c", "1", server_ip],
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL,
+            timeout=5
+        )
+        if result.returncode == 0:
+            print(f"   ✓ Server IP {server_ip} is reachable\n")
+        else:
+            print(f"   ✗ Server IP {server_ip} is NOT reachable\n")
+    except Exception as e:
+        print(f"   ✗ Ping failed: {e}\n")
+
+if __name__ == "__main__":
+    test_connection()