posprinter | react native pos printer | 3D Printing library
kandi X-RAY | posprinter Summary
kandi X-RAY | posprinter Summary
react native pos printer
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Top functions reviewed by kandi - BETA
- Add commands to an array
- Converts the given bitmap to a new bitmap
- Decode bitmap
- Sets Printer
- Start the BluetoothPrinting service
- Prepare socket and connect socket
- Connect to the device
- Close the device
- Reads data from the stream
- Convert an integer to a byte array
- Read data from the input stream
- Convert an integer to a byte array
- Connect a device to the connected devices
- Creates a writeable map from a device
- Start scanning of devices
- Activate Bluetooth discovery
- Initialize this activity
- Requests permission to access the location of the activity
- Set the print model
- Get a list of all devices that are connected to this device
- Writes a byte array to the output stream
- Gets the bonded devices
- Scan devices
- Open cash box
- Activate Bluetooth receiver
- Get all bonded devices
posprinter Key Features
posprinter Examples and Code Snippets
Community Discussions
Trending Discussions on posprinter
QUESTION
I am creating a POS app. I started with the POS printer and it is working. After that I added the "open cash drawer" functionality. But it interferes with the POS printer somehow.
So what is happening?
When I only claim a POS printer, printing works fine. Also when I only claim a Cash drawer, the drawer opens fine. So no problem there.
But when I claim both (POS printer and drawer) at the same time, the printing gets stuck or freezes. The drawer still opens fine. Most of the time when I claimed both, the first print looks fine, but it doesn't cut the paper. When I print again the program freezes.
Somehow I can not use these two objects at the same time:
...ANSWER
Answered 2022-Feb-03 at 07:02It consists of two factors.
- Probably because you have a cash drawer connected to the extension of the printer.
- And because the OPOS service object provided by the printer vendor is designed so that the printer and cash drawer cannot be used at the same time.
Such a configuration is called a hydra device.
Some printer vendors have a specification that allows the printer and cash drawer to operate independently even in such a configuration.
You don't have to be careful if you switch to a printer from that vendor, or switch the cache drawer to one that works independently, not via a printer.
If you want to use it as it is, it seems that the usage is described in the notes of OPOS service object provided by the printer vendor, so please follow it.
Probably, the printer and the cache drawer cannot be used at the same time, and if they are used, the exclusive control right is acquired by the Claim method, and when it is finished, the exclusive control right is released by the Release method.
By the way, it seems that the API you are using is Windows.Devices.PointOfService, not POS for.NET.
Please correct the description of the question and the contents of the tag to suit you.
And if so, replace the method name I presented with a suitable name.
QUESTION
I am using the Microsoft Point Of Service SDK and I am testing both in my application and the Sample provided with the SDK to try and print a Line with code similar to this:
...ANSWER
Answered 2021-Jun-14 at 18:08Microsoft Point Of Service(part of the UnifiedPOS implementation) is an API with an abstract standard specification and does not have all the features of a real printer.
If your printer and the service object that runs it do not have DrawRuledLine functionality, you will get that error.
ErrorCode Enumeration (POS for .NET v1.12 SDK Documentation)
Illegal
An attempt was made to perform an illegal or unsupported operation with the device, or an invalid parameter value was used.
The presence or absence of the function can be confirmed in advance by checking the value of the CapRecRuledLine(CapSlpRuledLine for Slip stations) property.
If you want to draw a line on a receipt with this DrawRuledLine method, you need to switch to a printer and service object that supports that feature.
If you don't want to change the printer, you'll have to replace it with a character line.
QUESTION
I'm using the Microsoft.PointOfService library to control an Epson POS receipt printer. I'm trying to add logos to the receipts, but I can't seem to get the PrintMemoryBitmap(...) function to work. The PrintBitmap(...) function works just fine, but for my application, it would be much more efficient to print a bitmap from memory, instead of saving the image to the file system.
My code is:
...ANSWER
Answered 2021-May-27 at 05:02Before and after PrintMemoryBitmap, try changing the ILegacyControlObject.BinaryConversion property to Nibble or Decimal and add a process to return it to None.
ILegacyControlObject Interface (POS for .NET v1.12 SDK Documentation)
ILegacyControlObject Properties (POS for .NET v1.12 SDK Documentation)
ILegacyControlObject.BinaryConversion Property (POS for .NET v1.12 SDK Documentation)
BinaryConversion Enumeration (POS for .NET v1.12 SDK Documentation)
An example of how to call it is as follows, which is coded in MainForm.cs of the sample application of POS for.NET SDK.
QUESTION
I have an Epson TM-T88VI printer and use the Microsoft.PointOfService.PosPrinter in C# for printing.
I try to print QR codes via ESC POS commands.
Everything works OK until printing QR code data with 125+ bytes.
This is my function:
...ANSWER
Answered 2020-Apr-08 at 02:42There are a lot of complications involved in this.
First, as I answered the previous question, if you are using POS for.NET(including OPOS/JavaPOS), don't send the printer's ESC/POS control command directly with the PrintNormal method.
If you want to print a QR code, it may be supported by PrintBarcode method, please check the ADK document of EPSON, and if you can't find it in the ADK document, please contact EPSON support desk.
It is possible to send ESC/POS control commands for the printer according to the UnifiedPOS specification.
A UnifiedPOS POSPrinter escape sequence called "Path through embedded data" (ESC|[*]#E) will send the bytes of data specified in # directly to the printer.
However, it is assumed that the service object supports the feature. Please check with your ADK documentation or support contacts for support availability.
Next, it depends on whether you're using a POS for.NET native service object or an OPOS service object via COM Interop.
When using OPOS service objects, the conversion from Unicode to ANSI code pages is done automatically by the OLE runtime function during the method call, and character codes greater than 127 can be changed by the system code page. Also, if there is a 0x00 in the middle of the data, it will be terminated there and the rest of the data will be ignored.
This is because the parameter of the PrintNormal method are string, not a byte array.
ILegacyControlObject.BinaryConversion property of the service object can be changed to Nibble or Decimal instead of the default value of None.
However, depending on the implementation of COM Interop of POS for.NET, attention may be needed, so it is better to contact the support desk about how to use it.
If you're using a native service object in POS for.NET, it depends on how it's implemented. Again, please check with your ADK documentation or contact support desk for more information.
QUESTION
I have an Epson TM-T88VI printer and use the Microsoft.PointOfService.PosPrinter in C# for printing.
Using the following function i get a strange output printed:
...ANSWER
Answered 2020-Apr-08 at 01:21The reason why letters like F are printed is because the printer is in the initialized state, code page 437.
Look at the letters in the following material at 213 in decimal and 0xD5 in hexadecimal.
Page 0 [PC437: USA, Standard Europe]
The POS for.NET service object internally manages code page settings according to the value of CharacterSet property.
If the application arbitrarily sends initialization commands to the printer, the service object's management information may be inconsistent and the printer may print incorrectly.
If you are using POS for.NET (including OPOS/JavaPOS), you should not use the initialization command (ESC@) or similar commands to change the mode or settings.
In that sense, instead of sending the paper cut also directly the ESC i({ 27, 105 }) command, call the CutPaper method or put the POSPrinter paper cut escape sequence (ESC|P) defined in UnifiedPOS in the print request string.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install posprinter
Open up android/app/src/main/java/[...]/MainActivity.java
Add import com.reactlibrary.RNPosPrinterPackage; to the imports at the top of the file
Add new RNPosPrinterPackage() to the list returned by the getPackages() method
Append the following lines to android/settings.gradle: include ':react-native-pos-printer' project(':react-native-pos-printer').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-pos-printer/android')
Insert the following lines inside the dependencies block in android/app/build.gradle: compile project(':react-native-pos-printer')
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