private void OnDataReceived(IAsyncResult ar)
{
try
{
StateObject state = (StateObject)ar.AsyncState;
int bytesRead = MainSocket.EndReceive(ar);
if (bytesRead > 0)
{
byte[] recvBytes = state.buffer;
//Judge the header info
string print_data = null;
for (int index = 0; index < bytesRead; index++)
{
print_data += recvBytes[index].ToString("X2");
if ( recvBytes[index] == 0x0D && recvBytes[index + 1] == 0x0D) //header confirmed
{
//NOTE: there is NO CRC check in here. it is better to have a CRC check by using XOR calculation, for instance, for a whole data of "0D0D10FFFF00430000000001507981FA",
//the CRC value would be the last byte (15th) which is "FA" and it could be got through 0D (xor) 0D(xor)10(xor)FF(xor)FF(xor)00(xor)43(xor)00(xor)00(xor)00(xor)00(xor)01(xor)50(xor)79(xor) 81
byte[] tagBytes = new byte[9]; //Declare a new byte array to store the tag ID
for (int i = 0; i < 9; i++)
{
//get the Tag ID, a tag id contains 8 bytes (0 ~ 7) in total, and the 8th bytes stands for the status
tagBytes[i] = recvBytes[i + index + 6];
}
RFIDTag temp = ConvertTag(tagBytes);
for (int j = 0; j < tags.Count; j++)
{
if (tags[j].ID == temp.ID)
{
tags.RemoveAt(j);
break;
}
}
tags.Add(ConvertTag(tagBytes));
if (tags.Count > 0)
{
List<ListViewItem> items = new List<ListViewItem>();
foreach (RFIDTag tag in tags)
{
IInsertListViewItem(this, listView1, tag);
//tags.Remove(tag);
}
}
}
}
//print out the raw data
Console.WriteLine("---" + print_data);
// if the Get Gain response from the reader to the PC
// GetGainValue(recvBytes, bytesRead);
}
MainSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(OnDataReceived), state);
}
catch (Exception ex)
{
}
}
public static void IInsertListViewItem(Form form, ListView t, RFIDTag tag)
{
if (t.InvokeRequired)
{
InsertListViewItem a = new InsertListViewItem(InsertListViewItem1);
form.Invoke(a, new Object[] { t, tag});
}
else
{
updateListView(t, tag);
}
}
public static void updateListView(ListView t, RFIDTag tag)
{
lock (t)
{
string dataTime = DateTime.Now.ToString();
for (int i = 0; i < t.Items.Count; i++)
{
if (t.Items[i].SubItems[2].Text == tag.ID)
{
t.Items[i].SubItems[4].Text = dataTime;
int count = Convert.ToInt32(t.Items[i].SubItems[3].Text.ToString()) + 1;
t.Items[i].SubItems[3].Text = count.ToString();
t.Items[i].SubItems[6].Text = tag.Temperature;
t.Items[i].SubItems[5].Text = tag.Battery;
t.Items[i].SubItems[7].Text = tag.Buckle;
t.Items[i].SubItems[8].Text = tag.Vibration;
if (tag.Call != "")
{
t.Items[i].SubItems[9].Text = "Button Pressed";
t.Items[i].BackColor = Color.OrangeRed;
}
else if (tag.ButtonPress != "")
{
t.Items[i].SubItems[9].Text = tag.ButtonPress;
t.Items[i].BackColor = Color.OrangeRed;
}
else
{
t.Items[i].SubItems[9].Text = "";
t.Items[i].BackColor = Color.White;
}
if (tag.Mount == "Mounted")
{
t.Items[i].SubItems[10].Text = tag.Mount;
t.Items[i].BackColor = Color.Green;
}
else if (tag.Mount == "Un-mounted")
{
t.Items[i].SubItems[10].Text = tag.Mount;
t.Items[i].BackColor = Color.White;
}
return;
}
}
// total tags number
ListViewItem item = new ListViewItem();
ListViewItem.ListViewSubItem subItem = new ListViewItem.ListViewSubItem();
subItem.Text = (t.Items.Count + 1).ToString();
item.SubItems.Insert(0, subItem);
// tag type
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = tag.Type;
item.SubItems.Insert(1, subItem);
//tag id
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = tag.ID;
item.SubItems.Insert(2, subItem);
//count
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = Convert.ToString(1);
item.SubItems.Insert(3, subItem);
//timestamp
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = dataTime;
item.SubItems.Insert(4, subItem);
//Battery
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = tag.Battery;
item.SubItems.Insert(5, subItem);
//Temperature
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = tag.Temperature;
item.SubItems.Insert(6, subItem);
//Buckle
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = tag.Buckle;
item.SubItems.Insert(7, subItem);
//Vibration
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = tag.Vibration;
item.SubItems.Insert(8, subItem);
//Panic button
subItem = new ListViewItem.ListViewSubItem();
if (tag.Call != "")
{
subItem.Text = "Button Pressed";
}
else if (tag.ButtonPress != "")
{
subItem.Text = tag.ButtonPress;
}
else
{
subItem.Text = "";
}
item.SubItems.Insert(9, subItem);
//Mounted
subItem = new ListViewItem.ListViewSubItem();
subItem.Text = tag.Mount;
item.SubItems.Insert(10, subItem);
t.Items.Add(item);
}
}
public static void InsertListViewItem1(ListView t, RFIDTag tag)
{
updateListView(t, tag);
}
private static RFIDTag ConvertTag(byte[] record)
{
RFIDTag tag = new RFIDTag();
tag.Battery = (record[8] < 128) ? "Low" : "High";
switch (Convert.ToInt16(record[8] & 0x000F))
{
//Configurable Card Tag
case 0:
tag.ID = GetTagID(record, 7);
tag.Type = "127002";
tag.Buckle = "";
tag.ButtonPress = "";
tag.Call = "";
tag.Mount = "";
tag.Temperature = "";
tag.Vibration = "";
break;
//Configurable Strip Tag
case 1:
tag.ID = GetTagID(record, 7);
tag.Type = "127001";
tag.Buckle = "";
tag.ButtonPress = "";
tag.Call = "";
tag.Mount = "";
tag.Temperature = "";
tag.Vibration = "";
break;
// Temperature Tag
case 2:
//RFIDTagMemory temperature = new RFIDTagMemory();
tag.Temperature = GetTempData(record) + " °C";
//temperature.MemoryType = RFIDTag_MemoryType.Temperature;
tag.ID = GetTagID(record, 5);
tag.Type = "127003";
tag.Buckle = "";
tag.ButtonPress = "";
tag.Call = "";
tag.Mount = "";
tag.Vibration = "";
//tag.AddTagMemory(temperature);
break;
//Vibration Tag
case 3:
//RFIDTagMemory vibration = new RFIDTagMemory();
tag.Vibration = (Convert.ToInt16(record[8] & 0x0040) > 0) ? "Yes" : "No";
//vibration.MemoryType = RFIDTag_MemoryType.Vibration;
tag.Type = "127004";
tag.ID = GetTagID(record, 7);
tag.Buckle = "";
tag.ButtonPress = "";
tag.Call = "";
tag.Mount = "";
tag.Temperature = "";
//tag.AddTagMemory(vibration);
break;
//Key-fob Tag
case 8:
//RFIDTagMemory keyfob = new RFIDTagMemory();
if (record[8] == 0xA8)
{
tag.ButtonPress = "Button#1 Pressed";
}
else if (record[8] == 0x98)
{
tag.ButtonPress = "Button#2 Pressed";
}
else
{
tag.ButtonPress = "";
}
//keyfob.MemoryType = RFIDTag_MemoryType.Button;
tag.Type = "127012";
tag.ID = GetTagID(record, 7);
tag.Buckle = "";
tag.Call = "";
tag.Mount = "";
tag.Temperature = "";
tag.Vibration = "";
//tag.AddTagMemory(keyfob);
break;
//Wristband Tag
case 5:
//RFIDTagMemory callMem = new RFIDTagMemory();
//callMem.MemoryType = RFIDTag_MemoryType.CallButton;
tag.Call = ((record[8] & 0x0020) > 0) ? "Button Pressed" : "";
//RFIDTagMemory buckleMem = new RFIDTagMemory();
//buckleMem.MemoryType = RFIDTag_MemoryType.Buckle;
tag.Buckle = ((record[8] & 0x0010) > 0) ? "Buckle Opened" : "Buckle Secured";
tag.Type = "127006";
tag.ID = GetTagID(record, 7);
tag.Mount = "";
tag.Temperature = "";
tag.Vibration = "";
tag.ButtonPress = "";
//tag.AddTagMemory(callMem);
//tag.AddTagMemory(buckleMem);
break;
//Beaconing Tag
case 6:
//RFIDTagMemory mount = new RFIDTagMemory();
tag.Mount = ((record[8] & 0x0010) > 0) ? "Mounted" : "Un-mounted";
//mount.MemoryType = RFIDTag_MemoryType.Mount;
tag.Type = "127005";
tag.ID = GetTagID(record, 7);
tag.Buckle = "";
tag.Call = "";
tag.Temperature = "";
tag.Vibration = "";
tag.ButtonPress = "";
//tag.AddTagMemory(mount);
break;
default:
tag.ButtonPress = "";
//keyfob.MemoryType = RFIDTag_MemoryType.Button;
tag.Type = "";
tag.ID = GetTagID(record, 7);
tag.Buckle = "";
tag.Call = "";
tag.Mount = "";
tag.Temperature = "";
tag.Vibration = "";
break;
}
return tag;
}
