It was something strange happened to my MPU6050 sensor or maybe to me Arduino UNO R2 board.
When I want to read yaw pitch roll angles using i2cdevlib and open example sketch
MPU6050_DMP - everything works
MÍInitializing I2C devices... Testing device connections... MPU6050 connection successful Send any character to begin DMP programming and demo:
when I use FreeIMU example sketch
MPU6000_DMP i get error
Initializing MPU device... Testing device connections... MPU60X0 connection failed Send any character to begin DMP programming and demo: Initializing DMP... DMP Initialization failed (code 1)
ok, I reload freeimu library and forgot to configure it :)