I am using arduino controller to connect to Gy-521 MPU6050
i did connection as per data sheet and used example sketch from google for simple accelerometer project.
the output is not showing correct value-- for all x, y,z axis i only get -1
the connections are like this
GY521 VCC --> 3.3V
GY521 GND--> GND
GY521 SCL --> SCL
GY521 SDA --> SDA
program is like this
// MPU-6050 Short Example Sketch
// By Arduino User JohnChi
// August 17, 2014
// Public Domain
#include "Wire.h"
const int MPU_addr=0x68; // I2C address of the MPU-6050
int16_t AcX,AcY,AcZ,Tmp,GyX,GyY,GyZ;
char tmp_str[7];
char* convert_int16_to_str(int16_t i) {
sprintf(tmp_str, "%6d", i);
return tmp_str;
}
void setup(){
Serial.begin(9600);
Wire.begin();
Wire.beginTransmission(MPU_addr);
Wire.write(0x6B); // PWR_MGMT_1 register
Wire.write(0); // set to zero (wakes up the MPU-6050)
Wire.endTransmission(true);
}
void loop(){
Wire.beginTransmission(MPU_addr);
Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(MPU_addr,14,true); // request a total of 14 registers
AcX=Wire.read()<<8|Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
AcY=Wire.read()<<8|Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
AcZ=Wire.read()<<8|Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
Tmp=Wire.read()<<8|Wire.read(); // 0x41 (TEMP_OUT_H) & 0x42 (TEMP_OUT_L)
GyX=Wire.read()<<8|Wire.read(); // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
GyY=Wire.read()<<8|Wire.read(); // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
GyZ=Wire.read()<<8|Wire.read(); // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)
Serial.print("AcX = "); Serial.print(convert_int16_to_str(AcX));
Serial.print(" | AcY = "); Serial.print(convert_int16_to_str(AcY));
Serial.print(" | AcZ = "); Serial.print(convert_int16_to_str(AcZ));
Serial.print(" | Tmp = "); Serial.print(Tmp/340.00+36.53); //equation for temperature in degrees C from datasheet
Serial.print(" | GyX = "); Serial.print(convert_int16_to_str(GyX));
Serial.print(" | GyY = "); Serial.print(convert_int16_to_str(GyY));
Serial.print(" | GyZ = "); Serial.println(convert_int16_to_str(GyZ));
Serial.println();
delay(1333);
}
############## oUTPUT######################
21:29:26.770 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:26.864 ->
21:29:28.153 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:28.247 ->
21:29:29.524 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:29.617 ->
21:29:30.900 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:30.993 ->
21:29:32.275 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:32.369 ->
21:29:33.661 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:33.754 ->
21:29:35.044 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:35.138 ->
21:29:36.406 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:36.524 ->
21:29:37.774 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:37.868 ->
21:29:39.143 -> AcX = -1 | AcY = -1 | AcZ = -1 | Tmp = 36.53 | GyX = -1 | GyY = -1 | GyZ = -1
21:29:39.237 ->