US Patent 11922396 Sending pairing and payment instructions to devices

Techniques described herein enable a payment service to generate and send different instructions regarding a wireless payment reader based on a current state of the payment reader. For instance, a wireless payment reader may include a quick-response (QR) code that uniquely identifies the payment reader relative to other payment readers. Further, the QR code may embed information identifying the wireless payment reader and/or a uniform resource locator (URL) pointing back to a payment service configured to process payment transactions with the wireless payment reader. In response to receiving an indication of a scan of the QR code, the payment service may determine whether the payment reader is currently paired. If not, then the payment service may generate and send pairing instructions to enable pairing with the payment reader. If so, then the payment service may generate and send payment instructions to cause the device to engage in a payment flow.