NFC Tap-to-Pair: How New Matter Chips Are Changing Smart-Home Setup

Tap to start setup, not just to trigger a routine

Matter is adding a way to commission a smart-home device by tapping your phone on it, and STMicroelectronics' ST25DA-C is a chip built for that job. You tap, the device wakes enough to talk, and setup begins without scanning a QR code or waiting on Bluetooth. Parts of the standard are still settling. Here's what is solid and what isn't.

What tap-to-pair changes

Matter 1.4.1 added only basic NFC support, according to Matter Alpha's explainer: a tag could hold the same setup payload as the QR code, but Bluetooth or Wi-Fi still finished the job. The newer NFC Transport Layer (NTL) is different. The phone and device hold an active two-way conversation over NFC, and the setup messages travel over that link.

That's a big deal for installers and makers. A ceiling fixture or in-wall switch can be configured before it is fully powered, a use case CNX Software highlights. Matter Alpha sums up the flow as tap, power up, use. The device still needs power to join Wi-Fi or Thread. NFC replaces the pairing step, not the network.

If you want the radio background, our guide on how NFC and Bluetooth differ covers why a 13.56 MHz tap behaves so differently from a Bluetooth scan.

What the ST25DA-C does

eeNews Europe's report describes the ST25DA-C as a secure NFC Forum Type 4 tag that supports the Matter tap-to-pair flow. It calls it the first commercial chip built for the updated standard. Key details from that report:

• It performs the SPAKE2+ and signature operations commissioning needs, and can do so without a battery, drawing power from the phone's 13.56 MHz field.
• It stores keys, certificates and Matter attributes, with more than 3 KB of non-volatile memory reserved for provisioning data.
• Security hardware is Common Criteria-certified, with SESIP Level 3 as the target.
• It adds Matter OTA firmware updates over I²C, in a 3 × 2 mm UFDFPN-8 package.
• Samples were available at announcement, with mass production planned for 2026.

For manufacturers there is a cost angle. If a device needs Bluetooth LE only for onboarding, NFC could remove that radio from the bill of materials, though that depends on buyers owning NFC phones. If you work with tag-to-microcontroller designs, NFC tags that talk to a microcontroller is a useful companion read.

Version confusion: 1.5, 1.5.1 or 1.6?

Early coverage tied the chip to Matter 1.5. Matter Alpha reported that NTL carried a "Provisional" label, meaning it was not yet available for companies to certify in commercial devices, with full support expected in Matter 1.5.1. CNX Software, writing in June 2026, shows an NTL section in the Matter 1.6 Core Specification and describes NFC commissioning as a 1.6 feature.

We couldn't settle this from the Connectivity Standards Alliance's own documents, so treat the exact version as unconfirmed. Before you buy a device marketed as "NFC setup", check whether it is certified and which Matter version it lists.

Fallbacks, and how this differs from a sticker tag

Matter Alpha reports two safeguards in the specification: vendors must still provide the standard QR code and numeric pairing code for phones without NFC, and the NFC setup point must not be reachable while the product is still in its retail packaging.

This is also a different thing from the sticker tags you may already use. A sticker holds a fixed NDEF record that your phone reads to trigger a routine, as in our guide to NFC tags that trigger smart-home routines. Matter commissioning is a secured two-way exchange with the device's chip, so writing a record to a tag won't recreate it.

Where this leaves you

NFC tap-to-pair is a real direction for Matter, and the ST25DA-C shows chips are arriving. Which Matter release makes it certifiable, and when products ship in volume, is still unclear. Until then, expect the QR code to stay on the box.

Frequently Asked Questions

Do I need a special phone for Matter NFC setup?

You need a phone with NFC, and the ecosystem app must support the new flow. Matter Alpha notes SmartThings and Apple already have basic NFC setup support. Vendors must still offer the QR code and numeric code as a fallback.

Can I buy a Matter NFC tap-to-pair device today?

Mass production of the ST25DA-C was planned for 2026, and Matter Alpha reported the NFC layer as Provisional and not yet certifiable. Check each product's certification before assuming it works.

Does the NFC tap replace Wi-Fi or Thread?

No. The tap handles commissioning. The device must still be powered on to join your Wi-Fi or Thread network.