fingerprint sensor dead?

Hi, grove fingerprint sensor will blink red once after powered up. Then if you upload sketch “enroll” to it, it should initialize and ready to get the fingerprint.
For this error: “fingertest Did not find fingerprint sensor :frowning:”, please check whether you are using the newest library on this wiki link. Please also make sure that this sensor is well connected to D2 grove port of Base shield. Thanks!