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I'm speaking to the printer via a serial connection and text printing is working fine. My attempt at resurrecting the thread has been unsuccessful. I researched everywhere for a concrete example in vb6 or vb. In my case, the image is already a blob so I guess there is one less step to send it. It has nothing to do with b4a as I haven't even found a vb6 example on the net so far. Like most stuff, it's probably not that complex once you know what to do Thanks in advance!
Erel Administrator Staff member. Licensed User. I was able to translate most of it but I can't translate some of the lines in b4a. Erel said:.Murgi ka virus
Which lines weren't you able to translate? I'm a bit rusty, but here goes someone better at this check my work. The byte returns it as a byte, not as another data type. Last edited: May 21, It is equivalent to this code: B4X:. OR slice, bb.Rockpro64 pcie gpu
Thanks Erel, Yesterday, I was driving km to go visit a client so I wasn't able to reply to your very helpful post. This is the client where I'm implementing my b4a Android solution. I will implement it without the signature printing at first and add this feature ASAP. I will revive that thread if I have further C translation problem. I have a related question however. I know that the printer's manufacturer Star Micronics has a Java Android SDK available that could facilitate such tasks as printing graphics.
Would it be possible using reflexion to somehow interface b4a with these java classes and interact with the printer? Thanks again for your time Eral and rmgb JF. Hi jflaplante, if you need this routine 'only' for the printing of the signature, which is always?When printing to one of these little receipt printers, you could always use a windows driver which lets windows see it as standard GDI printer and therefore send graphics as a bitmap to the printer from any windows program.
This works but its extremely slow. A 24dpi printer will take a long time to print a big bitmap image. There is some work involved in understanding how this is done. So lets get started by showing you how these printers deal with graphics slices. I opened both programming books and found generally the same graphics format. Well sure, that makes perfect sense. Nowhere is this explained very well. The bit layout at the bottom does a great job of explaining the layout of each slice, but what about n I assume that d It is quite confusing and terribly written but if you study the formula given for 8 dot mode, it starts to make, well, no sense at all.
I have never used that specific command myself. I will definitely check it out and thanks for the tip. You are the hardware expert per your credentials on LinkedIn. I will check this in the manual in the morning and report back. Did you ever get it to work? Hi Kim, Unfortunately, shortly after writing this post, I moved on to another company and I no longer have access to the POS printers from my previous employer.
The code as written worked perfectly on the printers mentioned in the post and is still in use by that company today. I should have mwentioned in the post that it was written in Delphi I will try and get my hands on another printer for some update testing. Thanks Dan. I went to your link. Very clever and interesting stuff.This is a class that helps developers in designing POS printing forms the easy way. Developers can add images Logos, Ads, etc.
Printing images needed tons of code, and print-previewing was almost impossible since you might need to build an engine to parse those specific standard codes to display them on the screen. A much easier solution was to use the classic VB printer object, those unfamiliar with the printer object can read more about it here. To use the good old printer class of VB 6. NET code, you will need to use the PowerPack compatibility library, which can be downloaded here.
Now the class constructors takes the printer name as parameters, and also the Application path for constructing the path of images to be used if anyyou can pass the Application.
StartupPath for that. I used the following font sizes which were appropriate for my case. Feel free to change that as appropriate to yours:. For image printing, I used a PrintLogo subbut you can use a general method like PrintImage below :. Now, for my case, I sectioned the paper into 6 sections sixths for easier control. This might be appropriate for your case, but if not; you can easily change that. Also notice that my printer prints 48 characters in normal font, that is why I also sectioned the paper into 48 columns.
The following points can be seen as problems in the approach and can be used for future development of the article:.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
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Sign in to your account. I'm trying to put a small image PNG of a special character I've created on paint and I want it to put in front of a text Any idea how to put the image in front of the text? Its a small image, size of the character I'm writing on text. May you can try this this example.
Then, try this example, which contains a stripped-back version of bitImageColumnFormat that skips the line breaks. I used a 24x16 character:. Now im having the same problem as mdestafadilah, the image gets cutted I've been investigating about it and I saw a post of yours in stackoverflow that says that I could use two images chopped to add them together by simply repeating the command I make it but it doesnt work, since its in Double height, the first cutted image always go ahead of the double height words So the other solution you talked about on the post would be GS v I've tried too use your snippet rasterFormat.
I dont know what to do I try to solve it but its so hard, I know I don't have the skill to figure this one out. Can you make me the magic function to be able to make character image in double height situation?
S - Do you accept donations mike42? I really aprechiate your project, it made all my project easier! I think we are going to need a custom font for your use case. The driver does not really do this yet, so there is a bit more custom code. You will really be limited to the size of a character 24x12 in "font A" with this code.
I hope this is supported on your printer.Some commands require additional parameters which have to be expressed in bytes too. We provide best-in-class customer service and support directly from members of our dev team!ESC/POS Bluetooth Print Service
If we are available when you contact us, you will get a response in few minutes; otherwise the maximum turnaround is 24hs in most cases. Toggle navigation. SDK for. NET Standard. Download Take advantage of our Trial versions which are fully-functional and does not expire!
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POS Printing: The Easy Way
Need help? Contact Support We provide best-in-class customer service and support directly from members of our dev team!GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. It can be used in Flutter or pure Dart projects.
For Flutter projects, both Android and iOS are supported. Here are some printers tested with this library. Please add the models you have tested to maintain and improve this library and help others to choose the right printer. Skip to content.
Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. Dart Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again.
Latest commit. Latest commit be1 Apr 4, PRs are welcomed! Tested Printers Here are some printers tested with this library. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.
Jan 18, Removed tests. Jun 12, Jun 11, Print QR Codes using native commands. Apr 4, Added licence. Mar 20, This extension simplifies the communication with Bluetooth thermal printers and makes possible to create awesome apps. To send your data to the printer, just combine one block from the extension with a SendBytes block from the BluetoothClient component.Honeywell camera login
For example, you can print images from the assets, the SD card or the web. Just provide the name or the URL of the image.
You can also take a photo with your camera and directly send it to your printer. A dithering algorithm is applied to create the illusion of a grayscale instead of monochrome black. In the following you can find a list of all the blocks and some examples how to use them. The blocks for printing images, text and QR codes can be utilized with various options but also with reasonable default values.
Take into account that some manufacturers might use different commands. If you have a manual, we can find a solution. After I have read several questions concerning bluetooth printers in the app inventor forum, I decided to develop this extension in order to simplify things for inventors who want to print tickets, invoices or receipts.
If you want to purchase it, you can contact me via the contact form. Note that different manufacturers use slightly different command sets. Thus I have implemented multiple commands for QR code and image printing.
You have to try which one is supported by your printer model. Text can easily be converted with the ConvertText block which provides optional encoding. Before sending text, you can choose font sizes and select various formatting modes including bold, underlined and inverted.
Most printers support 2 fonts: the standard font A and a smaller font B. Set otherFont to true to choose the smaller font. You can use the default blocks, but also set parameters like the horizontal pixel size and the threshold for converting to black and white.
In order to imitate grayscale images, use the dithering option. If you want to take advantage of the paper format, rotate your pictures if they have been taken in landscape mode. The extension enables to create barcodes and QR codes. The QR code block chooses a suitable size according to your data. If you want to print barcodes, you have to provide appropriate data and the index that indicates the barcode system to be used.
At first, you always have to initialize the printer. Optionally you can select a character code page see your manual. Use the LineFeed to create a line break. If supported, you can cut the paper. After you have enabled bluetooth and paired the two devices, you can set up a connection using the BluetoothClient component. Select your printer from the list of AddressesAndNames and call the Connect method.
ESC/POS Simple Converter
You can use the Camera component to take an image and directly send it to your bluetooth printer. Other image sources can be the SD card and the web. For printing images, just provide the path, an URL or the name of the image.
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