1.This ESC with CAN or UARE communication,and it will be sold under we know the motor and propeller detail, because it need right software for the diffirent motor and propeller. At present, we only have firmware for combo motor 3515 KV350 propeller 16x5.4 And 5005 440KV,folding propeller Spiro 15X4.8.
2.Drfault firmware if no message to leave us.
3.FOC ESC firmware upgrade tutorial can be found in the page description.