Mobile Payments SDK Android Technical Reference/com.squareup.sdk.mobilepayments.cardreader/ReaderInfo/State/Ready

Ready

object Ready : ReaderInfo.State

The reader is available for use. Note that it is possible for a Ready cardreader to also be receiving a firmware update: this occurs for "non-blocking" firmware updates, and the update will be applied when the reader is next not in use after the firmwarePercent reaches 100%.