Go 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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    success := false

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

    json := chilkat.NewJsonObject()
    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",true)
    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",true)
    json.UpdateString("output.return","none")

    fmt := chilkat.NewFormats()
    jsonOut := chilkat.NewJsonObject()
    success = fmt.QrCode("generate",json,jsonOut)
    if success == false {
        fmt.Println(fmt.LastErrorText())
        json.DisposeJsonObject()
        fmt.DisposeFormats()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("file: ", *jsonOut.StringOf("outputs[0].path"))
    fmt.Println("QR version: ", jsonOut.IntOf("symbols[0].selectedEncoding.version"))
    fmt.Println("image: ", jsonOut.IntOf("outputs[0].width"), " x ", jsonOut.IntOf("outputs[0].height"), " pixels")

    //  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

    json.DisposeJsonObject()
    fmt.DisposeFormats()
    jsonOut.DisposeJsonObject()