Qiyun 1Pc KK2.1.5 KK21EVO Flight Controller With Large LCD Second MPU

KK21EVO is an evolution of Hobbyking KK2.1.5,all the firmware of KK2.1.5 can run on this FC, but KK21EVO have larger LCD,a second MPU make KK21EVO support FUTABA S.BUS, SPEKTRUM DSM2,DSMX satellite.JR DMSS satellite direct connection.There is the same main MCU(ATmega644PA) and hardware as KK2.1.5,user can flash all the KK2.1.5’s firmware.The second MPU use to convert S.BUS,DSM2,DSMX,DMSS protocol to PWM signal,user also can turn this MPU off so standard PWM receiver can be used.