First failure for me. Spark, RC and device all on latest release.

Spark descended down with motor running to just of the ground (6 inches) and danced around violently. Managed , after a few long seconds, to get it to respond to up stick and climb to 1 metre and recover ok.

DAT and TXT files available,

Please make sure that the drone and LEDs are behaving under PlamLaunch, refer to the tutorial below. If things were correct, I recommend taking a video with the whole operating processes and uploading the flight data to Dropbox. We will help to confirm. Thank you so much.