Unkown Device Error

[Sinusoidal1]

I have purchased a Anywhere Commerce Walker C2X reader from the Authorize.net POSPortal. I have downloaded the demo InPerson EMV app called "sampleapp" from GitHub. I already have an Authorize.net account and have tied the sampleapp to my gateway mobile devices. The device is enable in the Authorize.net back office. I have no problem logging into the Authorize.net account and obtaining a session token. When I enter an amount to perform an EMV transaction and press Process Payment, I get a EMV Status, Unknown Device Error. It appears the demo app is not able to communicate with the reader. I am using a Samsung Galaxy Tab A 9.7" tablet which is not an approved device but I have also tried this on a Galaxy Tab E 9.6" tablet with the same result (also not approved). Has anyone seen this, has any one been able to get their Walker C2x to work on a Galaxy Tab A or E tablet?

[JubinMathai]

Hi, I'm also having the same issue. I am able to login using the account credentials and also get proper session token for Merchant. But when I'm trying to make a payment I'm getting "Unknown device error, please try again."

[letson]

Hi, I am also facing the same issue. I have registered a sandbox account and try to test payment by using an android app and card reader (BBPOS CHIPPER™ 2X) but it always return "Unknown device error, please try again.". Please help me, i am rush of completion of my app to be published.