victorheid / arduino_barcode128

Generates a String representation of a Barcode (code 128)

arduino_barcode128

Generates a String representation of a Barcode (code 128)

Example of use

#include <Barcode.h>
Barcode barcode;
// (...)
void drawBarcode(String text)
{
//Call barcode.make with desired string to codify
  String bars = barcode.make(text);
  // Input -> 11648
  // Output -> "211412123221123221223112221231311222132212233111"
  // Each number is a bar length, alternating Black / White
  //Goes through retrieved string, drawing the bars
  for (int i = 0; i < bars.length(); i++){
      int barLen = bars[i] - '0';
      int startBar = posBar;
      posBar+= barLen;
      if (i%2 == 0) {
        display.fillRect(0, startBar, 45, posBar, GxEPD_BLACK);      
      } else {
        display.fillRect(0, startBar, 45, posBar, GxEPD_WHITE);
      }          
  }
  display.updateWindow(0, 0, 45, display.height(), false)
}

arduino_barcode128's Issues

128 bar code should end at 2331112

This library is very good. But I can't scan it with my mobile phone using the barcode generated by it. So I looked up a lot of information and found that the end of the bar code was one less.

     // Input -> 11648
    // Output -> "211412123221123221223112221231311222132212233111"

output should be "2114121232211232212231122212313112221322122331112"。

String bars = barcode.make(text);

The bars array should end up with a "2".