It looks like the sensor has been online consistently since the end of April, so all of the data is available to be retrieved––it is all safely stored in the cloud. This means you can download the data from the map graph (note that you will be limited by the average). You can also download it with any average using the API.
Unfortunately, it looks like the SD logger is not detected, so that component may have failed. If you’d like to troubleshoot it further, please email us at contact@purpleair.com.