detect_vesc_bridge.py

#!/usr/bin/env python3
"""
Simple ESP32 VESC Bridge Discovery Script
Minimal example to detect the bridge via mDNS.
"""

import socket

def discover_vesc_bridge():
    """Discover ESP32 bridge via mDNS and display information."""
    hostname = "vesc-bridge.local"
    port = 65102
    
    print(f"Looking for ESP32 bridge: {hostname}")
    print("-" * 50)
    
    try:
        # Resolve mDNS hostname to IP
        addr_info = socket.getaddrinfo(hostname, None, socket.AF_INET, socket.SOCK_STREAM)
        ip_address = addr_info[0][4][0]
        
        print(f"✓ Found device!")
        print(f"  mDNS Name: {hostname}")
        print(f"  IP Address: {ip_address}")
        print(f"  Port: {port}")
        
        # Verify connection
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.settimeout(2)
        if sock.connect_ex((ip_address, port)) == 0:
            print(f"  Status: ✓ Port {port} is open and reachable")
        else:
            print(f"  Status: ⚠ Port {port} is not accessible")
        sock.close()
        
        return ip_address
        
    except socket.gaierror:
        print(f"✗ Could not resolve {hostname}")
        print("\nTroubleshooting:")
        print("  - Ensure device is powered on and connected")
        print("  - Verify you're on the same network")
        print("  - Check mDNS is working on your system")
        return None
    except Exception as e:
        print(f"✗ Error: {e}")
        return None


if __name__ == "__main__":
    discover_vesc_bridge()