I have made flight controller using arduino nano + MPU6050 only but quadcopter is not getting armed.
I enabled quadx , gy_251 , nanowii  and removed # for these in config.h
Motors are not running.
It is hard for me to understand problem. Please help me..

Note: I am using my own tx rx from nr24l01 and tested one motor directly from rx and motor successfull started from rx so problem can be in code.

Thanks.