// Single inventory button click
private void btn_scan_Click(object sender, EventArgs e)
{
// Clear list & tag storage
Clear();
// Change UI state to scanning
SetUIState(true);
try
{
// Clear NurApi/Module tag storage
nur.ClearTags();
// Execute simple inventory
NurApi.InventoryResponse ir = nur.Inventory();
if (ir.numTagsMem > 0)
{
// Add all tags to list
AddTagsToList(nur.FetchTags());
}
else
{
// No tags found..
lstbox.Items.Add("No tags found");
}
}
catch (Exception ex)
{
MessageBox.Show("Inventory error: " + ex.ToString(), "Error");
}
// Change UI state to normal
SetUIState(false);
}
private async void InventoryButton_Click(object sender, RoutedEventArgs e)
{
InventoryButton.IsEnabled = false;
// Perform inventory, run in task because NurApi calls may block
await Task.Run(async() =>
{
try
{
// Clear nur tag stroage first
mApi.ClearTagsEx();
// Perform simple inventory
NurApi.InventoryResponse rsp = mApi.Inventory();
// Fetch all tags from reader
NurApi.TagStorage storage = mApi.FetchTags();
// Print some info
string txt = string.Format("{0} tags found\n", rsp.numTagsMem);
lock (storage)
{
foreach (NurApi.Tag tag in storage)
{
txt += tag.GetEpcString() + "\n";
}
}
// Show dialog in UI thread
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
var dialog = new MessageDialog(txt, "Inventory Results");
await dialog.ShowAsync();
});
}
catch (Exception ex)
{
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
var dialog = new MessageDialog(ex.Message, "Inventory Error");
await dialog.ShowAsync();
});
}
});
InventoryButton.IsEnabled = true;
}
/// <summary>
/// Searches the nearest tag.
/// </summary>
/// <param name="hNur">The NurApi header.</param>
/// <param name="autoTxLevel">if set to <c>true</c> [use auto tx level].</param>
/// <param name="tag">reference for the nearest tag</param>
/// <param name="usedTxLevel">reference for the used TxLevel.</param>
/// <returns>
/// The number of found tags.
/// </returns>
public static int SearchNearestTag(NurApi hNur, bool autoTxLevel, out NurApi.Tag tag, out int usedTxLevel)
{
// Set the used TxLevel
usedTxLevel = hNur.TxLevel;
// Clear previously inventoried tags from memory
hNur.ClearTags();
NurApi.TagStorage inventoriedTags = null;
if (autoTxLevel)
{
// Backup TX Level
int backupTxLevel = hNur.TxLevel;
// Search Tags with auto TX Level
for (int tx = MIN_TX_LEVEL; tx >= MAX_TX_LEVEL; tx--)
{
// Set TX Level
hNur.TxLevel = tx;
// Set the used TxLevel
usedTxLevel = tx;
// Perform simple inventory
NurApi.InventoryResponse ir = hNur.SimpleInventory();
// Did we find any Tag
if (ir.numTagsMem > 0)
{
// Yes we did
break;
}
}
// Fetch tags from module, including tag meta
inventoriedTags = hNur.FetchTags(true);
// Restore TX Level
hNur.TxLevel = backupTxLevel;
}
else
{
// Search Tags with fixed TX Level
for (int i = 0; i < RETRIES; i++)
{
// Perform simple inventory
NurApi.InventoryResponse ir = hNur.SimpleInventory();
// Did we find any Tag
if (ir.numTagsMem > 0)
{
// Yes we did
break;
}
}
// Fetch tags from module, including tag meta
inventoriedTags = hNur.FetchTags(true);
}
// Search stongest Tag
tag = null;
int maxRssi = -128;
for (int i = 0; i < inventoriedTags.Count; i++)
{
if (maxRssi < inventoriedTags[i].rssi)
{
maxRssi = inventoriedTags[i].rssi;
tag = inventoriedTags[i];
}
}
// Return number of found tags
return(inventoriedTags.Count);
}
private void DoGetTags()
{
if (!hNur.IsConnected())
{
AddLog("Connection required.");
return;
}
CurrentTag = null;
AllTags.Clear();
TagListView.Items.Clear();
TagLabel.Text = "---";
try
{
ResetToA();
hNur.ClearTagsEx();
NurApi.InventoryExParams invParam;
NurApi.InventoryExFilter[] invFilters;
// Disable EPC+DATA mode
hNur.InventoryReadCtl = false;
// Configure InventoryExParams for Temperature read
invParam.inventorySelState = NurApi.SELSTATE_SL;
invParam.inventoryTarget = NurApi.INVTARGET_A;
invParam.Q = hNur.InventoryQ;
invParam.rounds = hNur.InventoryRounds;
invParam.session = NurApi.SESSION_S0;
invParam.transitTime = 0; // Disable
// Configure InventoryExFilter
invFilters = new NurApi.InventoryExFilter[1];
invFilters[0].action = NurApi.FACTION_0;
invFilters[0].address = 0;
invFilters[0].bank = NurApi.BANK_TID;
invFilters[0].maskData = new byte[] { 0xE2, 0x80, 0xB0, 0x40 };
invFilters[0].maskBitLength = (invFilters[0].maskData.Length * 8) - 4;
invFilters[0].target = NurApi.SESSION_SL;
invFilters[0].truncate = false;
// Read
NurApi.InventoryResponse resp = hNur.InventoryEx(ref invParam, invFilters);
// Fetch tags from the module
NurApi.TagStorage tagStorage = hNur.FetchTags(true);
for (int i = 0; i < tagStorage.Count; i++)
{
NurApi.Tag tag = tagStorage[i];
AllTags.Add(new EM4325Tag(tag));
ListViewItem lvi = new ListViewItem(tag.GetEpcString());
lvi.SubItems.Add(tag.rssi.ToString());
lvi.SubItems.Add(tag.antennaId.ToString());
TagListView.Items.Add(lvi);
}
columnHeader_EPC.Width = -2;
columnHeader_RSSI.Width = -2;
columnHeader_AntID.Width = -2;
}
catch (Exception ex)
{
AddLog("Inventory error.");
AddLog("Message: " + ex.Message);
}
}
