An android app that can display qr to receive payment and then send bluetooth commands based on scenario

In need of an android app that runs on a fixed phone where users can select product on this mobile and based on those products selected a qr code is generated and shown on the screen along with inbuilt upi and amount. The user who selected the products then takes out his own phone, scans this upi code using any upi app of his choice. The payment and details are already embedded in the qr code so the payment amount is already filled in the user's app. He just completes the payment on his device. When the payment is done, the qr code disappears and app on my phone checks if the money was deposited in my account and based on that it plays payment successful or payment rejected on a bluetooth speaker connected to this phone after I receive the payment in my account.