I’m developing an Android kiosk app. I successfully paired the card reader, but it shows a “FailedToConnect (Please reinstall point of sale)” status. Even after resetting the reader multiple times and pairing it again, the connection still fails.
I’m wondering if it might be because I haven’t registered the app signing key fingerprint. I tried to register it, but I keep getting the message “Enter a valid SHA-256 certificate”, and I’m unable to proceed. I checked the SHA-256 fingerprint using ./gradlew signingReport.
Does the app also check the device location? I’m using application information of our customer account based in US, but the app is currently being developed in Korea.
What could be the issue?
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