Host-based Card Emulation - Trigger a reader app when HCE is read on reader device

Question

NFC tags can trigger an NFC reader app available on the phone, but HCE does not trigger any reader app. However, if I first open the reader app, then it works normally and, henc

Answer 1

First of all you must ensure you use Kitkat version of android to have HCE Support. Next, since HCE routs your Application ID to CPU and not to eSE or UICC Sim card, any app which depends on eSE or UICC sim card doesnt work with HCE. So you must be using HCE supported app to be identified by the reader. Next, the reader should send out Application ID such that any installed HCE app on your phone is able to respond to it.