A dirty little secret in the drone industry: many (non-DJI) drone companies are using ArduPilot as the brain in their aircrafts, and they’re not always holding up their end on the bargain. ArduPilot is a GPLv3 open-source project which allows it to be used on commercial products for free. Companies that use ArduPilot are required to acknowledge its use to the end user, and provide source code when shipping product (along with a few other stipulations). [Read more…]