How can I combine MPU6050 + RTC DS1307 using i2c??

Projects Networking, Protocols, and Devices
1

Hi there!

I need to combine two modules: MPU6050 and RTC1307). When I connect them together the project doesn't work...

How can I connect them using i2c??

Thanks in advance!!

2

How do you have the connection set-up? The MPU6050, according to Arduino Playground - MPU-6050 will act as a slave but has a master I2C embedded for other attached peripherals.

What adresses did you assign the MPU6050 and RTC? If both are on 0x68 things won't work.

3

Thanks Leroy2007!

You are right, both are on 0x68, but I don't know how to change the MPU's address...

In MPU6050.cpp...

#include "MPU6050.h"

/** Default constructor, uses default I2C address.

  • @see MPU6050_DEFAULT_ADDRESS
    */
    MPU6050::MPU6050() {
    devAddr = MPU6050_DEFAULT_ADDRESS;
    }

/** Specific address constructor.

  • @param address I2C address
  • @see MPU6050_DEFAULT_ADDRESS
  • @see MPU6050_ADDRESS_AD0_LOW
  • @see MPU6050_ADDRESS_AD0_HIGH
    */
    MPU6050::MPU6050(uint8_t address) {
    devAddr = address;
    }

etc etc....

In MPU6050.h

#define MPU6050_ADDRESS_AD0_LOW 0x68 // address pin low (GND), default for InvenSense evaluation board
#define MPU6050_ADDRESS_AD0_HIGH 0x69 // address pin high (VCC)
#define MPU6050_DEFAULT_ADDRESS MPU6050_ADDRESS_AD0_LOW

4

Just as a guess...

// change this
#define MPU6050_DEFAULT_ADDRESS     MPU6050_ADDRESS_AD0_LOW
// to this
#define MPU6050_DEFAULT_ADDRESS     MPU6050_ADDRESS_AD0_HIGH

But that would depend on the MPU6050 pinout on the breakout board and if you can change the level of AD0.