Epson TM-P20II, Техническое справочное руководство

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Chapter 5 Application Development Information
Precautions when Developing Applications
This section describes information that you should be aware of when developing systems and applications using
this product.
Notes on Printing Barcodes and Two-Dimensional Symbols
•
Ensure adequate space around the code; “quiet zone” that is required for the code.
•
To print PDF417 (two-dimensional symbol), the following settings are recommended.
Module height: 3 to 5 times the module width
Vertical size of the symbol: approximately 5 mm {0.20"} or more
•
The recognition rate of ladder bar codes and two-dimensional symbols may vary depending on widths of the
modules, print density, environmental temperature, type of paper, and characteristics of the reader. Make
sure to check the recognition rate beforehand to determine the settings and use conditions so that the restric-
tions of the reader are satisfied.
•
Reading quality of multi-gradation bar codes and two-dimensional symbols is not guaranteed.
•
When printing a ladder barcode or two-dimensional symbol that is created as a graphics data, set the print
speed to level 5.
Application Development and Distribution for iOS (Bluetooth model)
If your application uses Bluetooth to communicate with the printer, Epson must submit the application to Apple
before you submit it to the App Store. Please apply for each application you want to submit to the App Store
from the URL below.
U
https://www.epson-biz.com/ais/E/