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In the I2C bus, AT24C02 is used as a memory, the function is to store passwords. But I don't really understand that what is the meaning of the device address.At presentm,it is used to connect with MCU. Who can tell me something about the stored password? And how do the AT24C02 and single chip microcomputer coordinate work?

HI Jeff, i work in UAV project with nrf52, i use a gy+-87 as motion's sensor . i have update your library of mpu 6050 for nrf 51 to nrf52 and it worked well based on the i2cdev library of nrf. i wrote a similar lirary for the hmc5883 inspired from yours for adruino, but i have some problem, the first that when i set a bypass to MPU6050, it seems that didnt work because i don't receve any data from the mag sensor, second when i try a lonely mag sensor hmc5883, i get data but the function of set gain and set mode seems didnt work because the when i receive data , all parameters of the sensor are the default parameters. can u take an eye please in my library and try to fixed the problem because i see that all the code was right mpu6500.c mpu6500.h i2cdev.c i2cdev.h main.c