:Troubleshooting Hints:
1. Are you using this 5V Supply 5V logic breakout board (Fig-1) with pins soldered? If pins are not soldered, solder them and then go to Step-2.

Figure-1:
2. Connect AD0-pin to GND to assign I2C address at 0x68 and then upload the following sketch to see the presence of the sensor in the I2C Bus.
#include<Wire.h>
void setup()
{
Serial.begin(9600);
Wire.begin();
//---------------------------------
Wire.beginTransmission(0x68);
byte busStatus = Wire.endTransmission();
if(busStatus !=0 )
{
Serial.print("Sensor is not found on I2C Bus!");
while(1); //wait for ever
}
Serial.println("Sensor is found on I2C Bus.");
}
void loop()
{
}
3. If Step-2 works, then upload the following sketch to see that the built-in temperture sensor of MPU6050 is responding.
#include<Wire.h>
#define MPUaddr 0x68
void setup()
{
Serial.begin(9600);
Wire.begin();
}
void loop()
{
Wire.beginTransmission(MPUaddr); //Start communication with the MPU-6050.
Wire.write(0x6B); //We want to write to the PWR_MGMT_1 register (6B hex).
Wire.write(0x00); //enable temp sensor //Set the register bits as 00000000 to activate the gyro.
Wire.endTransmission();
//----pointing temp sensor-----------------
Wire.beginTransmission(MPUaddr); //Start communication with the MPU-6050.
Wire.write(0x41); //pointing Temp_Out_High Reg //Set the register bits as 00000000 to activate the gyro.
Wire.endTransmission();
Wire.requestFrom(MPUaddr, 2); //two-byte temp data //End the transmission with the gyro.
byte x1 = Wire.read();
byte x2 = Wire.read();
int x = (int)(x1<<8)|(int)x2;
//------compute temp from x-----
float mpuTemp = (float)(x/340.0 + 36.53); //formula from data sheets
Serial.print("Temp = ");
Serial.print(mpuTemp, 2); //2-digit after decimal point
Serial.println(" degC");
delay(1000);
}
4. Upload the following Library based sketch to check the response of the temperature element of MPU6050 sensor.
#include <MPU6050.h>
#include<Wire.h>
MPU6050 mpu; //device address 0x68 keyed in the library
void setup()
{
Serial.begin(9600);
Serial.println("Initialize MPU6050");
}
void loop()
{
float temp = mpu.readTemperature();
Serial.print("Temp = ");
Serial.print(temp, 2);
Serial.println(" *C");
//-------------------------
delay(1000);
}