What is the Matter manual pairing code? 11- vs 21-digit explained

When you can’t scan a Matter QR code, you fall back to the manual pairing code, the string of digits printed beneath it. It encodes the same information a commissioner needs to add the device, just in a form you can type.

11 digits vs 21 digits

Matter defines two lengths:

• 11-digit code: the standard, most common form. It carries the passcode and a short version of the discriminator (the value that helps apps tell your device apart from a neighbor’s during setup). Usually shown grouped as XXXX-XXX-XXXX, e.g. 3497-011-2332.
• 21-digit code: a longer form used when the device also needs to encode its Vendor ID and Product ID (for example, a device using a custom onboarding flow). Same idea, more data.

Both are entered the same way in your smart home app; the app figures out which length you’ve typed.

QR code vs manual code: what’s the difference?

They add the same device, but they don’t carry identical data. The QR code includes the full payload, including discovery capabilities and the full discriminator. The manual code is deliberately compact, so it holds a short discriminator and no discovery hints. In practice both commission the device fine; the QR is just richer, which is why scanning is the preferred path when the sticker is readable.

The number that never changes

Unlike the temporary codes you get from multi-admin sharing (which expire in minutes), the manual pairing code is your device’s permanent factory code. That’s the one worth archiving: if you have the 11- or 21-digit code written down, you can always re-add the device, even without the QR.

Save the digits you can’t afford to lose

ReMatter lets you type in a manual pairing code by hand and keeps it alongside your scanned QR codes, searchable, backed up, and ready whenever you need to re-commission.