[Feature]

[LucaFagan]

Feature description

I'm using

    let parser = MTRQRCodeSetupPayloadParser(base38Representation: "MT:5KR00-Q000KA0648G00")
    
    if let payload = try? parser.populatePayload()
    {
        let serialNumber = payload.serialNumber
        let productIdHex = String(format:"%04X", payload.productID.uint64Value)
        let vendorIdHex = String(format:"%04X", payload.vendorID.uint64Value)
        let versionHex = String(format:"%02X", payload.version.uint64Value)
    }

to parse a commissioning QR code but serialNumber is nil.

Is it possible to have serialNumber in the QR code string ? How can generate such a QR code ?

Platform

darwin

Platform Version(s)

No response

Anything else?

No response

[bzbarsky-apple]

The serial number would need to live in the TLV extension bits of the payload. Specifically, you would have an anonymous-tagged structure with a single field: context-specific tag 0, type string or unsigned integer, value serial number. So something like hex bytes 152c0002424318 for a two-char string "BC".

% chip-tool payload generate-qrcode --existing-payload "MT:5KR00-Q000KA0648G00" --tlvBytes hex:152c0002424318 --version 0
[1684509906518] [59255:25761244] [TOO] QR Code: MT:4KR00-Q000KA064IJ3P0GUE20A6.S0

to generate a payload like the one you have above but with valid version number and those TLV bytes. That leads to:

% chip-tool payload parse-setup-payload MT:4KR00-Q000KA064IJ3P0GUE20A6.S0
[1684509957942] [59353:25762171] [SPL] Parsing base38Representation: MT:4KR00-Q000KA064IJ3P0GUE20A6.S0
[1684509957942] [59353:25762171] [SPL] Version:             0
[1684509957942] [59353:25762171] [SPL] VendorID:            4969
[1684509957942] [59353:25762171] [SPL] ProductID:           32768
[1684509957942] [59353:25762171] [SPL] Custom flow:         0    (STANDARD)
[1684509957942] [59353:25762171] [SPL] Discovery Bitmask:   0x00 (NONE)
[1684509957942] [59353:25762171] [SPL] Long discriminator:  3840   (0xf00)
[1684509957942] [59353:25762171] [SPL] Passcode:            20202021
[1684509957943] [59353:25762171] [SPL] SerialNumber:        BC

I should fix MTRSetupPayload's qrCodeString to encode the serialNumber in there if it's set.... Then you could just set your payload's serialNumber and qrCodeString to get the string.

Also, you should probably use MTRSetupPayload.setupPayload(onboardingPayload: ...) for parsing, not the deprecated MTRQRCodeSetupPayloadParser bit.

[LucaFagan]

It works, thanks