hawyar/de2120_py

DE2120_Py

Python module for the SparkFun 2D Barcode Scanner Breakout - DE2120.

This python package is a port of the existing SparkFun DE2120 Arduino Library

Contents

• Supported Platforms
• Dependencies
• Installation
• Documentation
• Example Use

Supported Platforms

The Qwiic Button Python package current supports the following platforms:

• Raspberry Pi

Dependencies

This driver package depends on the pyserial package.

Documentation

The SparkFun 2D Barcode Scanner Breakout module documentation is hosted at ReadTheDocs

Installation

PyPi Installation

This repository is hosted on PyPi as the de2120-barcode-scanner package. On systems that support PyPi installation via pip, this library is installed using the following commands

For all users (note: the user must have sudo privileges):

sudo pip install de2120-barcode-scanner

For the current user:

pip install de2120-barcode-scanner

To install, make sure the setuptools package is installed on the system.

Direct installation at the command line:

python setup.py install

To build a package for use with pip:

python setup.py sdist

A package file is built and placed in a subdirectory called dist. This package file can be installed using pip.

cd dist
pip install de2120-barcode-scanner-<version>.tar.gz

Example Use

See the examples directory for more detailed use examples.

from __future__ import print_function
import de2120_barcode_scanner
import time
import sys

def run_example():

    print("\nSparkFun DE2120 Barcode Scanner Breakout Example 1")
    my_scanner = de2120_barcode_scanner.DE2120BarcodeScanner()

    if my_scanner.begin() == False:
        print("\nThe Barcode Scanner module isn't connected correctly to the system. Please check wiring", \
            file=sys.stderr)
        return
    print("\nScanner ready!")

    scan_buffer = ""
    
    while True:
        scan_buffer = my_scanner.read_barcode()
        if scan_buffer:
            print("\nCode found: " + str(scan_buffer))
            scan_buffer = ""
        
        time.sleep(0.02)
    
if __name__ == '__main__':
    try:
        run_example()
    except(KeyboardInterrupt, SystemExit) as exErr:
        print("\nEnding Example 1")
        sys.exit(0)