I have successfully written an app for Honeywell Dolphin 75e device with both embedded and external ring scanner running Windows 10 Mobile Enterprise.
There are plenty of resources on how to deal with barcode scanners in UWP on the Internet. However, all off them are scanning into some text based user controls like so:
private async void ScenarioStartScanButton_Click(object sender, RoutedEventArgs e)
{
// Add a data receive event handler.
claimedScanner.DataReceived += claimedScanner_DataReceived;
}
async void claimedScanner_DataReceived(ClaimedBarcodeScanner sender, BarcodeScannerDataReceivedEventArgs args)
{
// Update the UI with the data received from the scan.
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
// Read the data from the buffer and convert to string.
var scanDataLabelReader = DataReader.FromBuffer(args.Report.ScanDataLabel);
ScenarioOutputScanDataLabel.Text = scanDataLabelReader.ReadString(args.Report.ScanDataLabel.Length);
var scanDataReader = DataReader.FromBuffer(args.Report.ScanData);
ScenarioOutputScanData.Text = scanDataReader.ReadString(args.Report.ScanData.Length);
ScenarioOutputScanDataType.Text = BarcodeSymbologies.GetName(args.Report.ScanDataType);
});
}
But what I need is the scanner to act like a keyboard on my WebView control:
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<WebView Source="http://google.co.uk"/>
</Grid>
When I don't use (don't claim) scanner explicitly in my app and leave the default working like it does globally for any app, the scanner does what I need in my WebView. But since I have to assign/claim different scanners within my app, I have to make it act like a keyboard, meaning, that when any user input field inside the WebView gets focus, I just scan input into it.
Here I found a similar question, although it was easy to solve, since only the parameter in URL (search term) had to be different for each scan.
UPDATE: I also thought about a workaround, so my app would claim the scanner and retain it even when I leave the app. In that case I could open a browser, navigate to my web app and use desired scanner. Unfortunately, all but embedded scanners seem to get disposed after I leave the app. Even though I don't explicitly dispose them.
None of Honeywell provided test apps seem to retain the claim either.
Ok, looks like I now understand how it all works. For what I need, I don't need to create any app that would claim and enable specific scanner, as it would put the scanner from default Wedge Mode to POS Mode.
The difference between those two modes is described in Dolphin 75e user guide.
Dolphin 75e models running Windows 10 IoT Mobile Enterprise has two scan modes, Wedge mode and POS mode. In Wedge mode bar code data is inserted into the keyboard interface, as if the bar code data was entered using the keyboard. POS mode implements Microsoft Point of Service interface. In POS mode, barcode data is sent to an application via the Microsoft defined APIs.
Scan wedge mode is enabled by default. The 75e remains in wedge mode until POS application starts and claims the scanner. The terminal only switches back to wedge mode when the POS application releases its claim on scanner.
So, all I need is to place scanner config file into /Documents/Profile folder, specifying which scanner I want to use in the Wedge mode. Unfortunately, my USB HID ring scanner cannot be put into the wedge mode...
Note that wedge mode is not supported for USB HID scanner in v66.4.0.638, or v66.4.0.569.
So after all this struggle I found out that if one wants to use 75e scanner for custom web app, or scan to, say, Excel spreadsheet - his only option is to use embedded scanner, which operates in Wedge mode by default.
And if you want to use USB HID scanner, then you can only use it for specifically developed app that implements Microsoft defined APIs. So basically, you will only be able to scan to specific user controls - text blocks, input fields - as shown in my first post.
UPDATE: Since version 66.4.0.718 USB HID scanner can also be used in wedge mode!
Related
I'm building web application for fitness center, they have a barcode scanner to which you are scanning your gym card into. What i'm trying to accomplish is to somehow get the data that the scanner is providing to them (name,surname and time of monthly subscription). My web application is built in ASP.NET C#, this is my first time dealing with this kind of problem.
I would appreciate your help or any other word of advice, feel free to ask more detailed questions.
If gym has barcode scanner like this
, it is seen in the system as a keyboard.
Such a scanner should also be able to set the ending character Tab or Enter. You do not need to confirm the scanned code then.
A card with a barcode as above returns the card number associated with a given person in the database.
You probably don't have access to the barcode scanner from MVC (Core or Framework). To do that you would probably have to run some software on the computer or phone that is scanning the member cards. There might be a solution though since the barcode scanner might be able to copy the id. This way you could input it to an input field in your MVC application and post it to the backend from there.
If i understand your Question correctly you probably need a SerialPort.
its actually pretty easy..
SerialPort serPort = new SerialPort("COM7"); // thats the USB port on which the scanner is connected
serial.DataReceived += new SerialDataReceivedEventHandler(serial_DataReceived);
serPort.Open();
and now you will receive everythig the Scanner has on:
private void serial_DataReceived(object sender, SerialDataReceivedEventArgs e){
string response = serPort.ReadExisting();
//do work
}
also if u dont know which port it is connected on use :
foreach (string sp in SerialPort.GetPortNames())
{
port = new SerialPort(sp)
{
Encoding = Encoding.GetEncoding("Windows-1252")
};
port.DataReceived += new
SerialDataReceivedEventHandler(Port_DataReceived);
port.Open();
}
this will watch over every Port you have see if something is connected and opens a connection to it, obviously if u have something like a mobile phone connected it will open a port with it too. but you can just make a check that if u scan u will only take that port and so on..
IF i did understand your question correctly that u want to know how to communicate with the Scanner thats how you do it.
if that was not your question, please comment and Clarify im working all day with Mobile Scanners Reading Barcodes so i think i will be able to help you.
Almost all handheld barcode scanners have a barcode in it's manual to change the scanner to function as a keyboard wedge. This way the scanner functions exactly like a keyboard device. You'd scan a barcode and keycodes are sent to the cursor location.
So just look up the make/model of your scanner and download its manual and look for a barcode that you can scan to change its emulation mode.
I need to send output reports to a USB "keyboard", but Windows returns an invalid handle when using CreateFile on the USB device. This is because Windows has the device open in exclusive mode. How do I still send output reports to the keyboard?
I have already looked into the HidP_Xxxx functions, but they all require the CreateFile to succeed with a valid handle. Also the Direct Input's SendDeviceData's documentation says that no device will work with it and to use HID instead. The link to HID documentation is broken on that page.
maybe this is an issue of the driver (the .inf file) of the barcode scanner and some specific keys it sets in registry, see the following links
http://www.cypress.com/knowledge-base-article/exclusive-access-usb-device
https://msdn.microsoft.com/en-us/library/windows/hardware/ff563827(v=vs.85).aspx (specifying exclusive access to device objects)
https://msdn.microsoft.com/en-us/library/windows/hardware/ff548407(v=vs.85).aspx (IoCreateDeviceSecure routine)
https://msdn.microsoft.com/windows/hardware/drivers/install/inf-addreg-directive
https://msdn.microsoft.com/en-us/library/dn790026(v=vs.85).aspx (register and initialize the barcode scanner driver)
https://msdn.microsoft.com/de-de/library/windows/desktop/ee416848(v=vs.85).aspx (Cooperative levels)
maybe use a program like USBDeview to clean the registry and reinstall the scanner again (check the inf file for the AddReg entry) or try to remove the exclusive access registry key for the barcode scanner manually
in addition the windows 10 hidscanner.dll seems to be buggy https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/pos-hid-barcode-scanner-drivers-being-deleted/206b5354-06e0-47cb-98b8-805f525e130e , https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/windows-10-with-pos-hid-barcode-scanner/2adc8ea9-556c-4b85-98fe-3b625c37ab76
I have a Surface Pro 4 that is being used in a medical environment and we would like to be able to disable to WiFi on the device when certain applications are running. Is this possible?
Disable is a relative term and as long as the device can't communicate over the wifi, even if technically active, that would meet the requirements. I wasn't able to find any way to do this though.
We could disable Wifi completely but would prefer to have it as an option for the users of the device when the specific applications aren't running.
The application in question is written in C#
You can do this with the Windows.Devices.Radios.Radio class by calling SetStateAsync(...).
There's a full example available at Microsoft's GitHub page, here's a snippet:
private async void SetRadioState(bool isRadioOn)
{
var radioState = isRadioOn ? RadioState.On : RadioState.Off;
Disable();
await this.radio.SetStateAsync(radioState);
NotifyPropertyChanged("IsRadioOn");
Enable();
}
Background
The company I work on is developing a kiosk-like application for tablets running Windows 8 Pro (on desktop mode). The user shouldn't be able to access anything that isn't the application itself: charms will be disabled, the taskbar will be hidden behind the application, etc.
This also means the user shouldn't be able to change network settings, leaving the responsability to keep the device always connected to us. Up to now, I had success using the Mobile Broadband API to assure the device is connected whenever there's a mobile network available. It'll detect disconnect events and try to connect again.
The Problem
Although the user shouldn't be able to do it, I'm considering the case where the user follows this steps:
User opens right-side charm,
clicks on Settings,
clicks on Network,
clicks on More PC Settings,
clicks on Wireless, and
disables the mobile broadband device.
I would like to be able to revert this programmatically and enable it again.
The Attempts
I have tried some different ways to force 3G being reenabled. Most of them give me the same result: they supposedly enable the device without errors, but I still cannot use it. Enable-NetAdapter in Powershell doesn't throw errors, and the Enable method of Win32_NetworkAdapter appears to work, but no dice.
I thought maybe the method IMbnRadio::SetSoftwareRadioState could be what I'm after, but I can't get to it when the device is disabled. The method IMbnInterfaceManager::GetInterfaces throws a COMException claiming the element could not be found (HRESULT = 0x80070490).
MbnInterfaceManager mbnInterfaceManager = new MbnInterfaceManager();
IMbnInterfaceManager interfaceManager = (IMbnInterfaceManager)mbnInterfaceManager;
// The following line throws a COMException:
IMbnInterface[] interfaces = (IMbnInterface[])interfaceManager.GetInterfaces();
mobileInterface = interfaces[0];
mobileRadio = (IMbnRadio)mobileInterface;
uint requestId;
mobileRadio.SetSoftwareRadioState(MBN_RADIO.MBN_RADIO_ON, out requestId);
Is there a way to override user preferences set on "More PC Settings?"
I found a sketchy way to solve this. Keep in mind this is undocumented, wrong, shameless and immoral, and will probably break eventually. The client is aware of this, but prefers to keep the access to the OS limited.
The setting in case is saved in the Registry. At least in the computers I've checked, it's stored in HKLM\SYSTEM\CurrentControlSet\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}\0022 in a key named RadioOff.
The Airplane Mode setting is also stored in the Registry, but in a different place. It's at HKLM\SYSTEM\CurrentControlSet\Control\RadioManagement\SystemRadioState in a key named (Default).
After changing these keys and rebooting, everything seems to work fine. I'll repeat though: you really shouldn't be doing this, especially the Airplane Mode thing.
I can't seem to find this anywhere.
I want to build an Audio Endpoint device that plugs into the Windows Phone Headphone Jack.
I know I need to start with what the phone is capable of receiving and detecting.
Ultimately I would like to use already in existence libraries however I have no heartache about writing my own.
My problem is I can't find any examples of how people access the Audio input on the phone outside of the built in microphone.
Is there a library for this?
You can detect when a headset is plugged in using the VOIP capabilities in Windows Phone 8.
First in the WMAppManifest.xml file, you need to enable ID_CAP_VOIP and ID_CAP_AUDIOROUTING
Then in the App, you need to capture the event
AudioRoutingManager.GetDefault().AudioEndpointChanged += AudioEndpointChanged;
public void AudioEndpointChanged(AudioRoutingManager sender, object args)
{
var AudioEndPoint = sender.GetAudioEndpoint();
switch (AudioEndPoint)
{
case AudioRoutingEndpoint.WiredHeadset:
MessageBox.Show("Headset connected");
break;
}
}
This will enumerate from this list (no custom endpoints allowed)
http://msdn.microsoft.com/en-us/library/windowsphone/develop/windows.phone.media.devices.audioroutingendpoint(v=vs.105).aspx
Sorry, but I can only answer the first part of your question about detecting the device, I'm not familiar with how the hardware device interfaces with the headphone jack to answer the rest.