I am developing an prototype for my dissertation. i was using ACR122u reader/writer, passing APDU command to pass data to android phone (HTC One M7). before i applied the last patch (6.09.401.5) ACR122u was detecting smartphone but after that it has stopped
Earlier i just used to activate NFC on smartphone and ACR122u will turn from red green signalling it has been detected.
please looking for some guidance
with regards
Probably "Auto PICC polling" was disabled due to the update, or the particular tag type is ignored during PICC polling. You could try to reset the PICC operating parameters to the default value (0xFF), either using a program to access your ACR122U reader provided by ACR or by using the following program.
public class ResetReader {
public static final int FILE_DEVICE_SMARTCARD = 0x310000;
public static final int IOCTL_CCID_ESCAPE_SCARD_CTL_CODE =
FILE_DEVICE_SMARTCARD + 3500 * 4;
public static void main(String[] args) throws Exception {
// the following loop lists all connected card terminals
TerminalFactory factory = TerminalFactory.getDefault();
for (CardTerminal term : factory.terminals().list()) {
System.out.println(term.getName());
}
// connect to the ACR122U by choosing the correct name
CardTerminal terminal = factory.terminals().getTerminal("ACS ACR122 0");
Card c = terminal.connect("DIRECT");
c.transmitControlCommand(IOCTL_CCID_ESCAPE_SCARD_CTL_CODE,
new byte[]{(byte)0xFF, 0x00, 0x51, (byte)0xFF, 0x00});
}
}
Related
I am trying to get the drone absolute altitude value (ASL) in real time (before taking off)
I have 2 drones, Mavic 2 enterprise advanced & M300.
When using the below code in mavic2, I was able to obtain the ASL, however the same code returns NULL value when using with M300:
Object heightAboveSeaLevel = KeyManager.getInstance().getValue(FlightControllerKey.create(FlightControllerKey.ABSOLUTE_GPS_ALTITUDE));
Also tried with no luck the below:
DJIKey GPSKey = FlightControllerKey.create(FlightControllerKey.ABSOLUTE_GPS_ALTITUDE);
DJISDKManager.getInstance().getKeyManager().getValue(GPSKey, new GetCallback() {
#Override public void onSuccess(#NonNull Object value) {
}
#Override public void onFailure(#NonNull DJIError error) {
}
});
On a side note, when using the M300, the ASL value is shown in the DJI Pilot app.
Anyone has accomplish the above or has any ideas to what I should use?
This is from DJI:
This KEY does not currently support the M300. Do you know how to use MSDK V5, which provides the KEY for obtaining real-time altitude: KeyRTKAbsoluteAltitude?
MSDK V5：https://developer.dji.com/doc/mobile-sdk-tutorial/cn/
import processing.serial.*;
String COM5;
Serial myPort;
String val;
void setup() {
String portName=COM5;
myPort= new Serial(this,portName,9600);
}
void draw() {
if(myPort.available()>0){
val=myPort.readStringUntil('\n');
}
println(val);
}
This is my code, I have copied from a website. when I try running it is showing
Error opening serial port null:null not permitted
I am badly in need of answer to go forward in my thermal imaging project.
You never give COM5 a value, so it's null. Then you pass that into the Serial() constructor. The Serial() constructor doesn't know what do do with a null value, so you get the error.
Please take a step back and read a tutorial on using the Serial library. The official documentation contains example code that uses the Serial() constructor correctly.
COM5 hasn't got a value as a String.
Try this in Processing:
import processing.serial.*;
Serial myPort;
String val;
void setup() {
myPort= new Serial(this, "COM5", 9600);
}
void draw() {
if (myPort.available()>0) {
val=myPort.readStringUntil('\n');
}
println(val);
}
Double check your Arduino appears as COM5 in Device Manager and you don't have Arduino's Serial Monitor open when you run the Processing sketch.
I am trying to detect iBeacons with a specific UUID and Major. The didRangeBeaconsInRegion is being called but the Beacon collection it returns has 0 entries.
The below is my code (abridged a bit)
private static final String BEACON_UUID = "F8AD3E82-0D91-4D9B-B5C7-7324744B2026";
private static final int BEACON_MAJOR = 36582;
#Override
public void onIBeaconServiceConnect() {
iBeaconManager.setRangeNotifier(new RangeNotifier() {
#Override
public void didRangeBeaconsInRegion(Collection<IBeacon> iBeacons, Region region) {
if (iBeacons.size() > 0) {
IBeacon thisBeacon = iBeacons.iterator().next();
}
}
});
try {
iBeaconManager.startRangingBeaconsInRegion(new Region("myUniqueID", BEACON_UUID, BEACON_MAJOR ,null));
} catch (RemoteException e) {
e.printStackTrace();
}
}
I am assuming I am doing my binding correctly as the didRangeBeaconsInRegion(..) is being called successfully.
I have used RadiusNetwork's own application to detected the beacons and that works fine and I can see them all so it is not seem to be an issue with Bluetooth on my device
A couple of tips:
Double check that your BEACON_UUID and BEACON_MAJOR are correct for the beacon that is transmitting. For testing, try setting both of these to null temporarily until you get it working, then you can set them back to the values you have.
It is normal for the iBeacons.size() to be zero sometimes if a beacon did not happen to be detected in a given cycle. But it should not always be of size zero. I'm not sure how you are testing, but try adding a Log.d(TAG, "Number of beacons detected: "+iBeacons.size()); and let it run to see if you ever get a non-zero number.
I suggest to check the uuid , major and minor values of your beacons and make them match with the region u want.
didRangeBeaconsInRegion should return an array af beacons.
You can use the "beecon" app to update easily the values.
Hope this can help you.
Regards.
How can I get a simple call back when a HID device, or at last, any USB/Bluetooth device gets connected/disconnected?
I made a simple app that shows the connected joysticks and the pressed buttons/axis for mac in a pretty way. Since I am not very familiar with cocoa yet, I made the UI using a webview, and used the SDL Joystick library.
Everything is working nice, the only problem is that the user needs to scan for new joysticks manually if he/she connects/disconnects something while the program is running.
With a callback, I I can just call the Scan function. I don't want to handle the device or do something fancy, just know when there is something new happening...
Thanks.
Take a look at IOServiceAddMatchingNotification() and related functions. I've only worked with it in the context of serial ports (which are in fact USB to serial adapters, though that doesn't matter), but it should be applicable to any IOKit accessible device. I'm not sure about Bluetooth, but it should at least work for USB devices. Here's a snippet of code I use:
IONotificationPortRef notificationPort = IONotificationPortCreate(kIOMasterPortDefault);
CFRunLoopAddSource(CFRunLoopGetCurrent(),
IONotificationPortGetRunLoopSource(notificationPort),
kCFRunLoopDefaultMode);
CFMutableDictionaryRef matchingDict = IOServiceMatching(kIOSerialBSDServiceValue);
CFRetain(matchingDict); // Need to use it twice and IOServiceAddMatchingNotification() consumes a reference
CFDictionaryAddValue(matchingDict, CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDRS232Type));
io_iterator_t portIterator = 0;
// Register for notifications when a serial port is added to the system
kern_return_t result = IOServiceAddMatchingNotification(notificationPort,
kIOPublishNotification,
matchingDictort,
SerialDeviceWasAddedFunction,
self,
&portIterator);
io_object_t d;
// Run out the iterator or notifications won't start (you can also use it to iterate the available devices).
while ((d = IOIteratorNext(iterator))) { IOObjectRelease(d); }
// Also register for removal notifications
IONotificationPortRef terminationNotificationPort = IONotificationPortCreate(kIOMasterPortDefault);
CFRunLoopAddSource(CFRunLoopGetCurrent(),
IONotificationPortGetRunLoopSource(terminationNotificationPort),
kCFRunLoopDefaultMode);
result = IOServiceAddMatchingNotification(terminationNotificationPort,
kIOTerminatedNotification,
matchingDict,
SerialPortWasRemovedFunction,
self, // refCon/contextInfo
&portIterator);
io_object_t d;
// Run out the iterator or notifications won't start (you can also use it to iterate the available devices).
while ((d = IOIteratorNext(iterator))) { IOObjectRelease(d); }
My SerialPortDeviceWasAddedFunction() and SerialPortWasRemovedFunction() are called when a serial port becomes available on the system or is removed, respectively.
Relevant documentation is here, particularly under the heading Getting Notifications of Device Arrival and Departure.
Use IOHIDManager to get the notifications.
Based on the earlier answers from Andrew and Arjuna, I ended up with the following snippet using IOHIDManager that should work with an Apple HID device (e.g. a bluetooth trackpad was tested). This appears to also send notifications more than once without needing to clear/decrement anything.
- (void) startHIDNotification
{
ioHIDManager = IOHIDManagerCreate ( kCFAllocatorDefault, kIOHIDManagerOptionNone );
CFMutableDictionaryRef matchingDict = IOServiceMatching(kIOHIDDeviceKey);
CFDictionaryAddValue(matchingDict, CFSTR(kIOHIDManufacturerKey), CFSTR("Apple"));
IOHIDManagerSetDeviceMatching (ioHIDManager, matchingDict);
IOHIDManagerRegisterDeviceMatchingCallback( ioHIDManager, AppleHIDDeviceWasAddedFunction, (__bridge void *)(self) );
IOHIDManagerRegisterDeviceRemovalCallback( ioHIDManager, AppleHIDDeviceWasRemovedFunction, (__bridge void *)(self) );
hidNotificationRunLoop = CFRunLoopGetCurrent();
IOHIDManagerScheduleWithRunLoop(ioHIDManager,
hidNotificationRunLoop,
kCFRunLoopDefaultMode);
}
and the callback methods
void AppleHIDDeviceWasAddedFunction( void * context,
IOReturn result,
void * sender,
IOHIDDeviceRef device)
{
NSLog(#"added");
}
void AppleHIDDeviceWasRemovedFunction( void * context,
IOReturn result,
void * sender,
IOHIDDeviceRef device)
{
NSLog(#"removed");
}
I'm trying to recognize speech with Windows 7 but it always recognizes a speech as a command or just says "What was that?".
How I can get all speeches?
CODE:
SpeechRecognizer _speechRecognizer;
public Window1()
{
InitializeComponent();
// set up the recognizer
_speechRecognizer = new SpeechRecognizer();
_speechRecognizer.Enabled = false;
_speechRecognizer.SpeechRecognized +=
new EventHandler<SpeechRecognizedEventArgs>(_speechRecognizer_SpeechRecognized); }
Perhaps you want to use the .net System.Speech namespace instead of SAPI? There is a very good article that was published a few years ago at http://msdn.microsoft.com/en-us/magazine/cc163663.aspx. It is probably the best introductory article I’ve found so far. It is a little out of date, but very helfpul. (The AppendResultKeyValue method was dropped after the beta.)
Are you trying to use a shared recognizer? That may be why you are seeing commands. Do you have a specific task for recognition? In that case, you would be better served with a task specific grammar and an inproc recognizer.
If you need to handle any words, use the DictationGrammar that comes with System.Speech. See http://msdn.microsoft.com/en-us/library/system.speech.recognition.dictationgrammar%28VS.85%29.aspx
For fun, I whipped together the simplest .NET windows forms app to use a dictation grammar that I could think of. I created a form. Dropped a button on it and made the button big. Added a reference to System.Speech and the line:
using System.Speech.Recognition;
Then I added the following event handler to button1:
private void button1_Click(object sender, EventArgs e)
{
SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine();
Grammar dictationGrammar = new DictationGrammar();
recognizer.LoadGrammar(dictationGrammar);
try
{
button1.Text = "Speak Now";
recognizer.SetInputToDefaultAudioDevice();
RecognitionResult result = recognizer.Recognize();
button1.Text = result.Text;
}
catch (InvalidOperationException exception)
{
button1.Text = String.Format("Could not recognize input from default aduio device. Is a microphone or sound card available?\r\n{0} - {1}.", exception.Source, exception.Message);
}
finally
{
recognizer.UnloadAllGrammars();
}
}