[PAID] USB Connector for ESC/POS Thermal Printers

[mmnettime]

SimpleUSBConnector

Extension to manage connection to an Esc/Pos thermal printer attached to the device via USB/OTG.

This extension doesn't do the esc/pos commands conversion so this extension is a complement for my extensions:

[PAID] ESC/POS Thermal Printing extension (Bluetooth/Network)

READ FAQS BEFORE CONTINUING:

Summary

Q: What's the purpose of this extension? A: Create different ESC/POS commands that thermal printers can interpret as text, images, bar codes, qr codes. In order to print RECEIPTS Q: How does this extension manage the connection to the printer? A: My "Thermal printing extension" itself doesn't manage any connection to the printer. You can use the in-built Bluetooth component for that (That method is used in the demo .apk and .aia i provide)…

[PAID] Receipt Builder for ESC/POS Thermal printing

Description Simple extension that is able to generate a receipt format, preview it in a Webviewer, convert it into a base64 image so it can be printed in ESC/POS thermal printers. As some users who have worked with thermal printers will know, working with them can be a headache, considering that each thermal printer is different and has limitations in terms of characters, fonts, styles and designing a receipt can be a complicated task. Definitely the best way to send to print with this kind of …

and i think it can also be used with this one:

ESC/POS Simple Converter

This extension manages a permission asked on runtime when a usb printer is attached to the device and shows an alert like this one:

Available blocks

Events:

USBConnectionSucceeded

Event raised when the connection to the printer was successful

USBConnectionFailed

Event raised when the connection to the printer failed

Parameter	Type
errorMessage	text

PermissionDenied

Event raised when the connection the permission to access the USB was denied by the user

USBDeviceAttached

Event raised when an USB devices is attached to the device

Parameter	Type
deviceName	text

USBDeviceDetached

Event raised when an USB devices is detached to the device

Parameter	Type
deviceName	text

Methods:

ConnectUSBPrinter

Connect to the USB printer connected to the device

IsPrinterReady

Validates if is printer is ready to receive printing commands

Return Type: boolean

GetAttachedDevices

Returs a list that contains the usb devices attached to the device

Return Type: list

SendDataToUSBPrinter

Send data to USB printer

Parameter	Type
list	list

CloseConnection

Closes the connection with the usb device if was previously established

Example blocks

Purchase:

You can buy the extension in the following link for $4 USD

SimpleUSBConnector for thermal printers Extension

[Bill_Ball]

Trying to get this to work over a usb cable. other apps will print. The example code provided does not. Here is my stripped down set of blocks I am working with. The printer connects but nothing happens with the line feeds. Any ideas?

[mmnettime]

What kind of printer are you using?

[Bill_Ball]

An embedded thermal receipt printer with USB/TTL interfaces and ESC/POS codes. (Amazon.com). It works over USB from an android tablet using the ESC/POS app on the Play Store but I haven't been able to get it to work with your code (or any of my other attempts in App Inventor). Any suggestions are appreciated.
Bill

[ABG]

If you haven't tried the Serial component, here's a test bed you can try, loaded with a few ESC/POS sample code sequences and some conversion procedures you can use for other codes.

I don't have a serial printer, so I can't test it.

serial_ESC_POS_test.aia (5.3 KB)

The source for the ESC/POS codes is in the Screen1.About attribute.

[Bill_Ball]

Thanks for your response and your efforts. This isn't working right off the bat for me but I am getting a Bluetooth enabled printer so hopefully that will be more successful.

[Bill_Ball]

I received a bluetooth printer and it works fine with mmnettime's demo app and source code.