altera2015 / usbserial Goto Github PK
View Code? Open in Web Editor NEWFlutter Android USB Serial plugin
License: BSD 3-Clause "New" or "Revised" License
Flutter Android USB Serial plugin
License: BSD 3-Clause "New" or "Revised" License
the lusb communication is working well with CP210x device, but with ftdi chip like FT232H we receive 2 bytes less than sended and also this exception
E/AndroidRuntime( 8729): java.lang.ArrayIndexOutOfBoundsException: src.length=193 srcPos=130 dst.length=185 dstPos=124 length=62
E/AndroidRuntime( 8729): at java.lang.System.arraycopy(Native Method)
E/AndroidRuntime( 8729): at com.felhr.usbserial.FTDISerialDevice.copyData(FTDISerialDevice.java:527)
E/AndroidRuntime( 8729): at com.felhr.usbserial.FTDISerialDevice.adaptArray(FTDISerialDevice.java:508)
E/AndroidRuntime( 8729): at com.felhr.usbserial.UsbSerialDevice$WorkerThread.doRun(UsbSerialDevice.java:329)
E/AndroidRuntime( 8729): at com.felhr.usbserial.AbstractWorkerThread.run(AbstractWorkerThread.java:21)
In usb_serial version 0.1.1 there seems to be no constant for setting the parity of a UsbPort object to 'even'.
I explored the underlying java library and noticed that this option is supported there. (link) I tried using '2' as a constant for setting the parity in UsbPort.setPortParameters() with no success. EDIT: Passing 2 in UsbPort.setParameters(...) worked for me.
Will the option to set the parity to 'even' be available in the near future or is there any workaround for that?
Getting warning: [deprecation] Registrar in PluginRegistry has been deprecated
with a clean build. Looking in the code, the reason seems to be that the library is using Android embedding v1.
Any plans to update the library to Android embedding v2 any time soon?
Thanks
I'm developing a project for IoT for home sensors. I want to retrieve data stored from the devices (Atmega running on arduino bootloader). But all the data is in string format and the device also accepts strings in the serial console. Is it possible to read and write strings using this library? Or would I have to encode and decode the messages on both ends?
Hello,
Thank you for the great package. I am having issues obtaining a data stream.
I am attempting to communicate with a device that is always streaming 01 and 60 once the serial connection is established. The screen shot below is of the raw data view of a usb sniffer. The data needed is only returned once A\r is sent to the device [41 0d].
I am wondering what method of this package would be best to pull the desired data out of the following stream?
I have tried several methods of obtaining a stream and keep receiving null or Instance of '_ControllerStream'. I am not sure if it is a matter of converting the data to something that the device can receive and read or if the data returned is not readable or nothing is being sent back at all.
Many thanks to anyone with suggestions
Is ios support in roadmap?
Flutter (Channel stable, 2.5.3, on Mac OS X 10.15.4 19E287 darwin-x64, locale en-TH)
Build on Android OS connect with SmartCard Reader
SmartCard Information:
I/flutter (19180): [UsbDevice: 58f-9540 EMV Smartcard Reader, Generic null]
I/flutter (19180): Device Id : 2002
I/flutter (19180): Hash Code : 449461508
I/flutter (19180): Product Name : EMV Smartcard Reader
I/flutter (19180): Vendor Id : 1423
I/flutter (19180): Product Id : 38208
I/flutter (19180): Port : null
I/flutter (19180): Serial No : null
source code in line:
_port = await device.create();
found error message:
I/flutter (19180): [UsbDevice: 58f-9540 EMV Smartcard Reader, Generic null]
I/usbhost (19180): usb_device_new /dev/bus/usb/002/002 fd: 119
I/usbhost (19180): usb_device_new read returned 111 errno 11
E/flutter (19180): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: PlatformException(UsbSerialPortAdapter, Not an Serial device., null, null)
E/flutter (19180): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607:7)
E/flutter (19180): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:156:18)
E/flutter (19180):
E/flutter (19180): #2 UsbSerial.createFromDeviceId (package:usb_serial/usb_serial.dart:431:33)
E/flutter (19180):
E/flutter (19180): #3 UsbDevice.create (package:usb_serial/usb_serial.dart:327:13)
E/flutter (19180):
E/flutter (19180): #4 _MyAppState._getPorts.. (package:flutterapp/main.dart:146:29)
E/flutter (19180):
E/flutter (19180):
Add Linux and Windows support
How to Print Image ?
I have a microcontroller that sends a string 'Device Boot
' on restart. I am using a regex to parse it, but soon as it does find it, i wish to perform a write - to send a $
signal which makes the microcontroller send logs.
I am using USB_SERIAL for Flutter.
This is the current setup:
Future<bool> _connectTo(device) async {
if (device == null) {
setState(() {
_status = "DISCONNECTED";
});
return true;
}
_port = await device.create();
if (!await _port!.open()) {
setState(() {
_status = "FAILED";
});
return false;
}
await _port!.setDTR(true);
await _port!.setRTS(true);
await _port!.setPortParameters(
115200, UsbPort.DATABITS_8, UsbPort.STOPBITS_1, UsbPort.PARITY_NONE);
_transaction = Transaction.stringTerminated(
_port!.inputStream!, Uint8List.fromList([13, 10]));
_subscription = _transaction!.stream.listen((String line) {
//Set in progress flag for first time read.
if (line.contains('Device Boot')) {
setState(() {
Wakelock.enable();
});
//Set timer for timeout
_timer = Timer(const Duration(seconds: 300), () {
Wakelock.disable();
_saveData(); // to save logs
});
}
return true;
}
And i wish to perform a write soon as it finds the first line Device Boot
.
The USB_SERIAL
's document suggests to use
await port.write(Uint8List.fromList('\$'.codeunits));
So i used the above code right after it found the boot line, like below
.....
_subscription = _transaction!.stream.listen((String line) {
//Set in progress flag for first time read.
if (line.contains('Device Boot')) {
// writing to device
await _port.write(Uint8List.fromList('\$'.codeunits));
setState(() {
Wakelock.enable();
});
.....
But this doesn't work for me, so i am really confused if this is where i should be performing the write, this is first time i am working with usb package. Any help is appreciated.
Hello,I found when header is [null] the pack will not add to controller in
usbserial/lib/transformers.dart
Line 352 in 890f290
I send a pack [18, 52, 86, 120]
and set the header to [null]
, the len
will be 52
.
So it will failed in
usbserial/lib/transformers.dart
Line 353 in 890f290
Thank you
I tried to use your example but it is giving a exception:
E/AndroidRuntime(30424): FATAL EXCEPTION: Thread-5 E/AndroidRuntime(30424): Process: dev.bessems.usbserialexample, PID: 30424 E/AndroidRuntime(30424): java.lang.RuntimeException: Methods marked with @UiThread must be executed on the main thread. Current thread: Thread-5 E/AndroidRuntime(30424): at io.flutter.embedding.engine.FlutterJNI.ensureRunningOnMainThread(FlutterJNI.java:794) E/AndroidRuntime(30424): at io.flutter.embedding.engine.FlutterJNI.dispatchPlatformMessage(FlutterJNI.java:684) E/AndroidRuntime(30424): at io.flutter.embedding.engine.dart.DartMessenger.send(DartMessenger.java:80) E/AndroidRuntime(30424): at io.flutter.embedding.engine.dart.DartExecutor.send(DartExecutor.java:174) E/AndroidRuntime(30424): at io.flutter.view.FlutterNativeView.send(FlutterNativeView.java:144) E/AndroidRuntime(30424): at io.flutter.plugin.common.EventChannel$IncomingStreamRequestHandler$EventSinkImplementation.success(EventChannel.java:226) E/AndroidRuntime(30424): at dev.bessems.usbserial.UsbSerialPortAdapter$1.onReceivedData(UsbSerialPortAdapter.java:60) E/AndroidRuntime(30424): at com.felhr.usbserial.UsbSerialDevice$WorkerThread.onReceivedData(UsbSerialDevice.java:361) E/AndroidRuntime(30424): at com.felhr.usbserial.UsbSerialDevice$WorkerThread.doRun(UsbSerialDevice.java:336) E/AndroidRuntime(30424): at com.felhr.usbserial.AbstractWorkerThread.run(AbstractWorkerThread.java:21)
When I remove this part of the code, the error disappears
_subscription = _transaction.stream.listen((String line) { setState(() { _serialData.add(Text(line)); if (_serialData.length > 20) { _serialData.removeAt(0); } }); });
But i need to receive data from UART.
Flutter Doctor:
Doctor summary (to see all details, run flutter doctor -v): [√] Flutter (Channel stable, v1.7.8+hotfix.3, on Microsoft Windows [versão 10.0.17134.829], locale pt-BR) [√] Android toolchain - develop for Android devices (Android SDK version 28.0.3) [!] Android Studio (version 3.4) X Flutter plugin not installed; this adds Flutter specific functionality. X Dart plugin not installed; this adds Dart specific functionality. [√] VS Code (version 1.36.0) [√] Connected device (2 available)
Any ideia what is might be?
I need to send value to Ingenico iUC 180B device.
I need to send value as this format. This code from my C# program.
writedata = "\x02" + "C20000000000000100s" + "\x03";
_serialPort.Write(writedata);
Please help
I have been communicating with FTDI 232HL using the package usb_serial.
Our flutter based app requires speed of 4Mbaud+.
Till 3Mbaud there are no issues but at any speeds higher than this there is no Communication with the application. I have tested the FTDI's communication on windows com port up to speed of 5Mbaud.
I had sent an email to FTDI support regarding communication at higher speeds. They had pointed out that there have been some changes in the JAVA file in relation to setting the baud rate for high speed devices.
How can I achieve 4Mbaud in the flutter application using usb_serial?
Hello guys!
I am learning about USB serial in Flutter language and see that your library is supporting this issue
But I import the library and run the example code, I get an error like this
When running to the section: "_port = await device.create ();" then it reports an error
"[ERROR: flutter / lib / ui / ui_dart_state.cc (148)] Unhandled Exception: PlatformException (UsbSerialPortAdapter, Not an Serial device., Null)"
Link driver: http://www.abacuselectrics.com/usbsoft.htm
Can you support me?
p / s: please I am not fluent in English so thanks to google translation, I hope you guys will apologize
THANK YOU!
Good Day,
When calling port.open(type, iface), at times it causes an entire app crash.
We have noticed it is when you pass the incorrect iface or type, when we looked a little deeper we noticed you are only catching the security exception.
Is it possible to add some further error handling to avoid the complete app crash?
Is there a way to use this plugin to have the Android device go in accessory mode instead of usb host?
Will you in the future make this plugin on another systems ? i solve this problem using processing ide . I communicate using udp and local host. Processing ide receive this udp and send Serial data. ?
Can i control gpio on cp2102n?
Is it possible to expose the call to list the device interfaces?
Hello, I'm trying to conduct communication with the CH340 driver who owns the Nodemcu or the Arduino Nano but it does not go: c I tested with ESP32 and with this if it detects me without problems.
I simulation usb COM1(android) and usb COM2,but the listDevices always null,when I click send,
error:
E/flutter ( 2498): [ERROR:flutter/shell/common/shell.cc(184)] Dart Error: Unhandled exception: E/flutter ( 2498): NoSuchMethodError: The method 'write' was called on null. E/flutter ( 2498): Receiver: null E/flutter ( 2498): Tried calling: write(Uint8Array) E/flutter ( 2498): #0 Object.noSuchMethod (dart:core/runtime/libobject_patch.dart:50:5) E/flutter ( 2498): #1 _MyAppState.build.<anonymous closure> package:usb/main.dart:71 E/flutter ( 2498): <asynchronous suspension> E/flutter ( 2498): #2 _InkResponseState._handleTap package:flutter/…/material/ink_well.dart:507
Is there plan to support the TUSB3410 chip from TI?
Hi,
I'm trying to create a stream for listening to the USB status (permission allowed/denied, OTG available or not, etc.). Is there any functionality built into this library to check for the same?
here is the sample pseudo code:
class USBStatusMonitor implements ReactiveState<USBStatus> {
const USBStatusMonitor(this._usb);
final UsbSerial _usb;
@override
Stream<USBStatus> get state => _usb.statusStream;
}
Is this functionality like statusStream or USBStatus available in this library for easy detection of sudden changes from the user (user suddenly disables OTG, OTG is not available on this device etc.)?
Running on Android 6.0.1 my app was closed by the system.
Android LogCat showed an null-reference exception at UsbSerialPortAdapter.java:67:
02-11 16:46:10.849 5944-5944/com.bytecmed.custom_slider D/AndroidRuntime: Shutting down VM
02-11 16:46:10.851 5944-5944/com.bytecmed.custom_slider E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.bytecmed.custom_slider, PID: 5944
java.lang.NullPointerException: **Attempt to invoke interface method 'void io.flutter.plugin.common.EventChannel$EventSink.success(java.lang.Object)' on a null object reference**
at dev.bessems.usbserial.UsbSerialPortAdapter$1$1.run(UsbSerialPortAdapter.java:67)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
02-11 16:47:15.405 5944-5944/com.bytecmed.custom_slider I/Process: Sending signal. PID: 5944 SIG: 9
UsbDevice.getDeviceName() is not mapped (converted) but might be needed. It usually contains some linux-style path of the device.
Does this only work with arduino-like devices? I can't get it to work with a thermal printer.
Hi,
First of, thank you very much for this package. I have used it on multiple projects now and it has worked super well :D
I am trying to receive and parse MAVLink message. This is the message format https://mavlink.io/en/guide/serialization.html
I know we can do something like this to set terminator bytes
Transaction.terminated(port.inputStream, Uint8List.fromList([48, 49]));
but MAVLink doesn't seem to have any terminator bytes.
Do you have any suggestions on how I can get the package to stop breaking a single message into multiple messages?
I'm getting E/flutter (29253): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: PlatformException(UsbSerialPortAdapter, Not an Serial device., null)
USB device:
+-o ACR1252 Dual Reader@14200000 <class AppleUSBDevice, id 0x100016c10, registered, matched, active, busy 0 (6 ms), retain 19>
Hi there,
What is the proper way to use this with null-terminated strings?
Transaction.stringTerminated(
_port.inputStream, Uint8List.fromList([0]));
Appears to work, but of course it also splits some of the data if it happens to be 0x00.
I connect a print device and run the example code then get the error, how can I fix it. thank!
Hi, I faced a very anoying issue I can't figure out :
my code goes goes like :
// we are in a statefull widget
bool listening;
@override
void initState() {
super.initState();
listening= false;
}
Transaction<Uint8List> transaction_0;
Future<void> startStop() async {
if (listening) {
// stop listening
transaction_0.dispose();
// send the stop command to usb device (no answer to wait)
Transaction<String> transaction_1 = Transaction.stringTerminated(
usbPort.inputStream, Uint8List.fromList([13, 10]));
await transaction_1.transaction(
usbPort,
Uint8List.fromList(("stop").codeUnits + [13, 10]),
Duration(seconds: 1));
// end this transaction_1
transaction_1.dispose();
listening= false;
} else {
// send some config commands to usb device witch will answer with confirmation
Transaction<String> transaction_1 = Transaction.stringTerminated(
usbPort.inputStream, Uint8List.fromList([13, 10])); // note the ending condition
String response = transaction_1.transaction(
usbPort,
Uint8List.fromList(("config bla bla").codeUnits + [13, 10]),
Duration(seconds: 1));
// little check here, always returns the good value
print(response);
// end this transaction_1
transaction_1.dispose();
-------------> HERE I need to completely clear the data
// start listening from the device (terminated needed here because of the "<END>" termination)
transaction_0= Transaction.terminated(
usbPort.inputStream, Uint8List.fromList("<END>".codeUnits)); // this ending condition
transaction_0.stream.listen((Uint8List data) {
// do stuff like writing the data from usb to a file... HERE the problem append to be visible with previous data leaked to the file
});
// send the start command to usb device (no answer, just run...)
await usbPort.write(Uint8List.fromList(("start").codeUnits + [13, 10]));
listening= true;
}
}
It all works great, ... on the first run... but if I stop the listening (from a button -> onTap: StartStop) and then restarts a new one, data leaks from the config response of transaction_1 to the transaction_0 and finish in my file where I write the return of transaction_0 ... but only after a first, clean run...
I tried flushing, disposing stream... nothing seems to prevent the data from being still disponible to transaction_0, after, transaction_1 already handled it...
My guess is that the transaction_0 stream is never ended at all and just listen to every data disponible on the port...
How to dispatch, successively, data from a transaction (temporary) to another one (witch is more persistent) ?
EDIT: as a workaroud, I close the port and re-execute the connexion routine but this feels wrong...
Trying to connect to a device fails throws a platform exception with the message "Failed to acquire USB device.".
Only occurs on Android 12.
This looks to suggest something went wrong between in android/src/main/java/dev/bessems/usbserial/UsbSerialPlugin.java
lines 145-166
.
final devices = await UsbSerial.listDevices();
if (devices.isNotEmpty) {
devices.first.create();
}
I have to make an app that communicates with an embedded software via USB. Is it possible to use this package in the emulator for debugging and development purposes?
Hello,
Not detecting CH340. But it works perfectly with FTDI. The felHR85/usbSerial dependency tells you it should work. Other apps like Google Play/Serial USB Terminal work with both cards.
Any suggestion?
Att
Raphael
I am not sure it is the right place to ask for such a question but I am struggling to for 2 days to manage to read the results coming from a usb device.
I manage to get the connection and I get the inputStream but I cannot find a way to get the data.
If i convert the stream to string I get :
[255,0,0,0,255....]
If I try to use:
newTag = new String.fromCharCodes(asyncSnapshot.data);
I get a string but with not the correct results something like YYYYYY, my string should be a number (12528548654213).
If i try to use :
newTag = ascii.decode(asyncSnapshot.data).trim();
I get an error
format exception invalid format exception : 255
I get the following error
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':usb_serial:verifyReleaseResources'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
> Android resource linking failed
/Users/user/.gradle/caches/transforms-2/files-2.1/0a271e99b6771ad4a84318244d532fb7/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/fontVariationSettings not found.
/Users/user/.gradle/caches/transforms-2/files-2.1/0a271e99b6771ad4a84318244d532fb7/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/ttcIndex not found.
Hi,
We are connecting to a thermal printer, however for some reason the port just won't open, do you have any advice?
The code below the section Usage of Asynchronous API in readme tab, in the web pub.dev has an error about the name of an variable, first the name is "port", and a few lines below is "_port",
Thnaks so much for the plugin :)
I've been looking at ways to encompass my current android only flutter app into a web app since web supports usb now. If I were to create a PR here, what are the guidelines and is it needed or is my use case isolated?
I am trying to communicate with arduino, i have chinese version. but this code is not supporting that. though code works perfectly ok with esp32.
Thanks for your plugin. It's really helpful.
I don't know why but the Samsung Android phone doesn't get this USB_Serial. Do you know how to resolve this issue?
I checked that it worked well on the other phone.
The current package version on pub.dev is on 0.1.1.
Could you update this to the current version, so the package can be used with flutter?
Google Pixel 2 XL. Android 10
When
List<UsbDevice> devices = await UsbSerial.listDevices();
E/MethodChannel#usb_serial(25991): Failed to handle method call E/MethodChannel#usb_serial(25991): java.lang.SecurityException: User has not given 10197/tw.kgame.chameleonminiapp permission to access device /dev/bus/usb/001/002 E/MethodChannel#usb_serial(25991): at android.os.Parcel.createException(Parcel.java:2071) E/MethodChannel#usb_serial(25991): at android.os.Parcel.readException(Parcel.java:2039) E/MethodChannel#usb_serial(25991): at android.os.Parcel.readException(Parcel.java:1987) E/MethodChannel#usb_serial(25991): at android.hardware.usb.IUsbSerialReader$Stub$Proxy.getSerial(IUsbSerialReader.java:123) E/MethodChannel#usb_serial(25991): at android.hardware.usb.UsbDevice.getSerialNumber(UsbDevice.java:143) E/MethodChannel#usb_serial(25991): at dev.bessems.usbserial.UsbSerialPlugin.serializeDevice(UsbSerialPlugin.java:205) E/MethodChannel#usb_serial(25991): at dev.bessems.usbserial.UsbSerialPlugin.listDevices(UsbSerialPlugin.java:220) E/MethodChannel#usb_serial(25991): at dev.bessems.usbserial.UsbSerialPlugin.onMethodCall(UsbSerialPlugin.java:258)E/MethodChannel#usb_serial(25991): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:222) E/MethodChannel#usb_serial(25991): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:96) E/MethodChannel#usb_serial(25991): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:656) E/MethodChannel#usb_serial(25991): at android.os.MessageQueue.nativePollOnce(Native Method) E/MethodChannel#usb_serial(25991): at android.os.MessageQueue.next(MessageQueue.java:336) E/MethodChannel#usb_serial(25991): at android.os.Looper.loop(Looper.java:174) E/MethodChannel#usb_serial(25991): at android.app.ActivityThread.main(ActivityThread.java:7356) E/MethodChannel#usb_serial(25991): at java.lang.reflect.Method.invoke(Native Method) E/MethodChannel#usb_serial(25991): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) E/MethodChannel#usb_serial(25991): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) E/MethodChannel#usb_serial(25991): Caused by: android.os.RemoteException: Remote stack trace: E/MethodChannel#usb_serial(25991): at com.android.server.usb.UsbUserSettingsManager.checkPermission(UsbUserSettingsManager.java:177) E/MethodChannel#usb_serial(25991): at com.android.server.usb.UsbSerialReader.getSerial(UsbSerialReader.java:96) E/MethodChannel#usb_serial(25991): at android.hardware.usb.IUsbSerialReader$Stub.onTransact(IUsbSerialReader.java:84) E/MethodChannel#usb_serial(25991): at android.os.Binder.execTransactInternal(Binder.java:1021) E/MethodChannel#usb_serial(25991): at android.os.Binder.execTransact(Binder.java:994)
Will this work with Flutter desktop and USB/Serial Comm Port devices?
E.g. a basic USB relay device plugged into the desktop?
In version 0.1.1 usb_serial
supports asynchronous communications, but not synchronous ones.
In my case I need kind of a handshake-type synchronous communication: whenever something is written to the attached USB device I need to know the response from the device for that specific command.
The feature request is the following:
When sending a String in synchronous manner...
"\r\n"
) or the maximum amount of milliseconds (configureable) has elapsedNULL
if the device did not response in timeThe point is: I have to wait for the response prior to sending the next command.
So I would like so see interfaces in the UsbPort
class like:
byte[] writeWithRead(String message, [byte[] stopSequence, int maximumWaitTime]);
byte[] writeWithRead(String message, [byte[] stopSequence]);
byte[] writeWithRead(String message, [int maximumWaitTime]);
void setDefaultStopSequence(byte[] defaultStopSequence);
void setDefaultMaximumWaitTime(int maximumWaitTime);
defaultStopSequence
and maximumWaitTime
should have reasonable defaults (e.g. "\n"
and 100
).
In my case I need different maximumWaitTimes
for different calls to de attached device, thus I need the option to specify it in the writeWithRead
call when sending commands which are taking more time on the attached device (e.g. "RESET" needs much more time then "GET_STATUS").
A mixture of sync/async USB communications should be suppored as well:
Code using this library should be able to:
port.writeWithRead(..)
callsport.write(...)
callsIn fact what I need to do is:
Every time I open the program it asks me for authorization to use the USB port every time.
Is it possible to remove the dialog once permissions have been granted?
Or somehow add the permissions so that the dialog doesn't open?
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