How to use multiple MPU6050 with one Arduino board

Other Hardware Sensors
1

I'm trying to get values from multiple MPU6050 gyro sensors with one Arduino board. I've tried I2C communication, but the two sensors are giving their values into one variable instead of the two separate ones I made.

I'm very new to Arduino and I would appreciate easy to understand explanations

here's the code I'm using:

#include "Wire.h"       
#include "I2Cdev.h"     
#include "MPU6050.h" 
#include "SoftwareSerial.h"

#define BT_RXD 8
#define BT_TXD 7
SoftwareSerial bluetooth(BT_RXD,BT_TXD);

MPU6050 mpu1(0x68);
MPU6050 mpu2(0x69);

int16_t ax1, ay1, az1;
int16_t gx1, gy1, gz1;

int16_t ax2, ay2, az2;
int16_t gx2, gy2, gz2;

void setup()
{
  Serial.begin(9600);
  bluetooth.begin(9600);
  Wire.begin();

  mpu1.initialize();
  if (mpu1.testConnection()) {
    Serial.println("MPU6050 1 connected");
  } else {
    Serial.println("MPU6050 1 connection failed");
  }
  mpu2.initialize();
  if (mpu2.testConnection()) {
    Serial.println("MPU6050 2 connected");
  } else {
    Serial.println("MPU6050 2 connection failed");
  }


}

void loop()
{

  // Read data from the first MPU6050
  mpu1.getMotion6(&ax1, &ay1, &az1, &gx1, &gy1, &gz1);

    // Read data from the second MPU6050
  mpu2.getMotion6(&ax2, &ay2, &az2, &gx2, &gy2, &gz2);

  // Map raw values to -32 to 32 range
  int mappedAx1 = map(ax1, -32768, 32767, -32, 32);
  int mappedAy1 = map(ay1, -32768, 32767, -32, 32);
  int mappedAz1 = map(az1, -32768, 32767, -32, 32);
  int mappedGx1 = map(gx1, -32768, 32767, -32, 32);
  int mappedGy1 = map(gy1, -32768, 32767, -32, 32);
  int mappedGz1 = map(gz1, -32768, 32767, -32, 32);

  // Map raw values to -32 to 32 range
  int mappedAx2 = map(ax2, -32768, 32767, -32, 32);
  int mappedAy2 = map(ay2, -32768, 32767, -32, 32);
  int mappedAz2 = map(az2, -32768, 32767, -32, 32);
  int mappedGx2 = map(gx2, -32768, 32767, -32, 32);
  int mappedGy2 = map(gy2, -32768, 32767, -32, 32);
  int mappedGz2 = map(gz2, -32768, 32767, -32, 32);

 
  Serial.print("X1, Y1, Z1 = "); Serial.print(mappedAx1); Serial.print(" "); Serial.print(mappedAy1); Serial.print(" "); Serial.println(mappedAz1);
  Serial.print("X2, Y2, Z2 = "); Serial.print(mappedAx2); Serial.print(" "); Serial.print(mappedAy2); Serial.print(" "); Serial.println(mappedAz2);
  Serial.print("X2 relative to X1 = "); Serial.println(mappedAx2-mappedAx1);
  Serial.print("Y2 relative to Y1 = "); Serial.println(mappedAy2-mappedAy1);
  Serial.print("Z2 relative to Z1 = "); Serial.println(mappedAz2-mappedAz1);



  delay(500);
}

image
image800×600 86.7 KB

very rough depiction of the wiring

2

You are better off powering the module from their own power source

3

The slave address of the MPU-60X0 is b110100X which is 7 bits long. The LSB bit of the 7 bit address is determined by the logic level on pin AD0. This allows two MPU-60X0s to be connected to the same I2C bus. When used in this configuration, the address of the one of the devices should be b1101000 (pin AD0 is logic low) and the address of the other should be b1101001 (pin AD0 is logic high)

5

can you please clarify what i should do?(I'm terribly sorry, I'm very new to this)

should i replace the (0x68) and (0x69) in the code with (b1101000) and (b1101001)?

6

0x68 and 0x69 should work.

7

thank you, i found out the problem(stupid line wasn't lining enough)

8

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