Perl Requires Chilkat v11.7.0+

Create a Wi-Fi QR Code

Demonstrates a QR code that joins a phone to a Wi-Fi network when scanned. A QR code only holds text. Phones recognize text of the form WIFI:T:;S:;P:;; and offer to join the network. T is WPA (also used for WPA2 and WPA3), WEP, or nopass for an open network, and H:true can be added for a hidden network. In the name and the password, the characters backslash, semicolon, comma, colon and double quote must each be preceded by a backslash.

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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

my $json = Chilkat2::JsonObject->new;
$json->UpdateString('payload.text', 'WIFI:T:WPA;S:Chilkat Guest;P:correct-horse-battery-staple;;');

# Level Q, so that the code still scans when it is printed small or gets worn.
$json->UpdateString('encoding.qr.errorCorrection', 'Q');
$json->UpdateInt('render.moduleSize', 8);

# Say which network it is under the code.
$json->UpdateBool('render.text.enabled', 1);
$json->UpdateString('render.text.value', 'Wi-Fi: Chilkat Guest');
$json->UpdateInt('render.text.scale', 2);

$json->UpdateString('output.path', 'qa_output/qr_wifi.png');
$json->UpdateBool('output.overwrite', 1);
$json->UpdateString('output.return', 'none');

my $fmt = Chilkat2::Formats->new;
my $jsonOut = Chilkat2::JsonObject->new;
my $success = $fmt->QrCode('generate', $json, $jsonOut);
if (!$success) {
    print $fmt->LastErrorText, "\n";
    exit;
}

print 'file: ', $jsonOut->StringOf('outputs[0].path'), "\n";
print 'QR version: ', $jsonOut->IntOf('symbols[0].selectedEncoding.version'), "\n";
print 'image: ', $jsonOut->IntOf('outputs[0].width'), ' x ', $jsonOut->IntOf('outputs[0].height'), " pixels\n";

# The image written to qa_output/qr_wifi.png:

# 

# Sample output:

# file: qa_output/qr_wifi.png
# QR version: 5
# image: 360 x 374 pixels