startData method
Implementation
Future<void> startData() async {
if (host == null || port == null) return;
final url = Uri.parse('http://$host:$port/start');
try {
final response = await http.post(
url,
body: jsonEncode({'start': "start"}),
headers: {'Content-Type': 'application/json'},
);
connected = true;
} catch (e) {
print('Error sending: $e');
}
notifyListeners();
}