H264 DVR RESET PASSWORD Hi3520, Hi3520D, Hi3521A, Hi3521D, Hi3531, Hi3535, ازالة الرقم السري

This reset method works for Hisilicon based DVR/NVR, including recorders that use Hi3520, Hi3520D, Hi3521A, Hi3521D, Hi3531, Hi3535, Hi3536 chips