public LinuxHealthHub()
{
var devId = Bluez.hci_get_route(IntPtr.Zero);
var sockFd = Linux.socket(Consts.AF_BLUETOOTH, Consts.SOCK_RAW | Consts.SOCK_CLOEXEC, Consts.BTPROTO_HCI);
var addr = new Sockaddr_hci
{
hci_family = Consts.AF_BLUETOOTH,
hci_dev = (ushort)devId,
hci_channel = Consts.HCI_CHANNEL_RAW
};
var status = Linux.bind(sockFd, ref addr, Marshal.SizeOf(addr));
status = Bluez.hci_le_set_scan_parameters(sockFd, 0, 0x10, 0x10, 0, 0, 1000);
var filter = new Hci_filter
{
type_mask = 0x00000010,
event_mask = 0x4000000000000000ul,
opcode = 0
};
status = Linux.setsockopt(sockFd, Consts.SOL_HCI, Consts.HCI_FILTER, ref filter, Marshal.SizeOf(filter));
status = Bluez.hci_le_set_scan_enable(sockFd, 1, 0, 1000);
watcher = new Thread(() =>
{
while (shouldRun)
{
var bytes = new byte[44];
Reflect.Call("Mono.Unix.Native.Syscall, Mono.Posix", "recv", sockFd, bytes, (ulong)bytes.Length, 0);
var offset = 16;
const DeviceKind kind = DeviceKind.Scale;
var ts = new DateTimeOffset();
var weightKg = BitConverter.ToUInt16(new[] { bytes[5 + offset], bytes[4 + offset] }, 0) / 10f;
var finished = bytes[6 + offset] != 255 && bytes[7 + offset] != 255;
OnHealthEvent?.Invoke(this, new SimpleData
{
Kind = kind,
Time = ts,
Data = weightKg,
Unit = Unit.kg,
Status = finished ? DataKind.Final : DataKind.Transitional
});
}
})
{
IsBackground = true,
Name = "Watcher"
};
watcher.Start();
}
public static extern int bind(int sockfd, ref Sockaddr_hci addr, int addrlen);