How to use the accelerometer- gyroscope GY-521

I am doing a high school project and I need help with programming. I am designing that 3 LEDs in the 2-3-4 digital output of the MEGA2560 board light up depending on the movement of the GY-521 (red- a lot of movement, yellow- normal movement and green- slow movement). can you help me

I have another problem, Gyro data is sended first and then Acceleration //read accel data GyX=(Wire.read()<<8|Wire.read()) + GyXoff; GyY=(Wire.read()<<8|Wire.read()) + GyYoff; GyZ=(Wire.read()<<8|Wire.read()) + GyZoff; //read temperature data temp=(Wire.read()<<8|Wire.read()) + toff; tx=temp; t = tx/340 + 36.53; //tf = (t * 9/5) + 32; // farenhait //read gyro data AcX=(Wire.read()<<8|Wire.read()) + AcXoff; AcY=(Wire.read()<<8|Wire.read()) + AcYoff; AcZ=(Wire.read()<<8|Wire.read()) + AcYoff; //get pitch/roll getAngle(GyX,GyY,GyZ); Also I need change input to function to input Gy as values to pitch, because data is sensed from module in opposite to what this tutorial show. Now I have accurate data. Problem is whit this module, that Gyroscope don't have Z axis. There is only X and Y, and for my needs I need Z axis more then that X and Y for my project. Now I need think if I need use magnetic earth module to display Z rotation

How do you change the accelerometer scale in the code? It seems like it is automatically set to +/-2g and I see no way of changing it.

Is there a way to connect, say, 7 of them to one arduino and get result values separately but fast enough that they are essentially at the same time, I guess what I am asking is, is there a way to change the i2c device id?

So the values I get are very inconsistent, when it is not moving at all it has a difference to the prvious one of up to 160. Can I somehow make this more accurate?

So a quick question, i'm very new to programming and using Arduino first off. If i'd like to change the pin out from: SCL -> A5 SDA -> A4 to: SCL -> A3 SDA-> A2 What part of the code would I need to change? This is for a school project. Any help would be appreciated, Thank you very much. Cheers!

The z-axis of accelerometer of MPU6050 is not providing any range of values as the x and y axes, the z-axis readings just flicker upon tilting in the z-axis direction. How do I resolve this problem? I need the z-axis readings to vary as I tilt the device in z-axis direction.

Thanks a lot ! It will help me a lot for a project !! :)

Very good illustration, i have couple of questions please reply 1) please explain line 8,9 and 15 in the code? why wire.write 0x6B, 0 and 0x3B to MPU? 2) how do you know first requested 6 bytes are for acc and next 6 for gyro, how one can know, i explore google but could not find datasheet of Gy521.

Crazy question, but did you have the username cratos333 ever? I used to get codes from a guy

I'm surprised that it doesnt give any errors but it doesnt give me any good values. It just tells me the same values all the time. Can you explain that how i could fix this?

I got error when i compile your code with Arduino Due 'call of overloaded 'beginTransmission(MPU_Type*)' is ambiguous'

What is the reason for the bit shift and is that an ORing? in the lines like: AcX=Wire.read()<<8|Wire.read();

Hello :) Thank you very much for sharing this project! How did you do the diagram/drawing of the gyro?

Great project! You might want to use functions tho to make your code more reusable.

The code has an error in it.. The data being recalled has a temperature reading between the accel and the gyro data. This code fixes it and it also 1. converts the accel data to roll and pitch angles. 2. calculates the temperature in F and C 3. adds correction values for the accel and temp data. ====================== #include<Wire.h> #include <math.h> const int MPU=0x68; int16_t AcX,AcY,AcZ,Tmp,GyX,GyY,GyZ; double pitch,roll; void setup(){ Wire.begin(); Wire.beginTransmission(MPU); Wire.write(0x6B); Wire.write(0); Wire.endTransmission(true); Serial.begin(9600); } void loop(){ Wire.beginTransmission(MPU); Wire.write(0x3B); Wire.endTransmission(false); Wire.requestFrom(MPU,14,true); int AcXoff,AcYoff,AcZoff,GyXoff,GyYoff,GyZoff; int temp,toff; double t,tx,tf; //Acceleration data correction AcXoff = -950; AcYoff = -300; AcZoff = 0; //Temperature correction toff = -1600; //Gyro correction GyXoff = 480; GyYoff = 170; GyZoff = 210; //read accel data AcX=(Wire.read()<<8|Wire.read()) + AcXoff; AcY=(Wire.read()<<8|Wire.read()) + AcYoff; AcZ=(Wire.read()<<8|Wire.read()) + AcYoff; //read temperature data temp=(Wire.read()<<8|Wire.read()) + toff; tx=temp; t = tx/340 + 36.53; tf = (t * 9/5) + 32; //read gyro data GyX=(Wire.read()<<8|Wire.read()) + GyXoff; GyY=(Wire.read()<<8|Wire.read()) + GyYoff; GyZ=(Wire.read()<<8|Wire.read()) + GyZoff; //get pitch/roll getAngle(AcX,AcY,AcZ); //send the data out the serial port Serial.print("Angle: "); Serial.print("Pitch = "); Serial.print(pitch); Serial.print(" | Roll = "); Serial.println(roll); Serial.print("Temp: "); Serial.print("Temp(F) = "); Serial.print(tf); Serial.print(" | Temp(C) = "); Serial.println(t); Serial.print("Accelerometer: "); Serial.print("X = "); Serial.print(AcX); Serial.print(" | Y = "); Serial.print(AcY); Serial.print(" | Z = "); Serial.println(AcZ); Serial.print("Gyroscope: "); Serial.print("X = "); Serial.print(GyX); Serial.print(" | Y = "); Serial.print(GyY); Serial.print(" | Z = "); Serial.println(GyZ); Serial.println(" "); delay(333); } //convert the accel data to pitch/roll void getAngle(int Vx,int Vy,int Vz) { double x = Vx; double y = Vy; double z = Vz; pitch = atan(x/sqrt((y*y) + (z*z))); roll = atan(y/sqrt((x*x) + (z*z))); //convert radians into degrees pitch = pitch * (180.0/3.14); roll = roll * (180.0/3.14) ; }

I know this post is 5 years old but, I am trying to use this code on an MPU-6050, and i am getting -1 for all values. I have my gyroscope plugged in exactly as the diagram says, with the exception of using the 5V line instead of 3.3V, as its indicated that that is better. Is it possible my MPU is just dead?

Hello :) Thank you very much for sharing this project! How did you do the diagram/drawing of the gyro?

I have another problem, Gyro data is sended first and then Acceleration //read accel data GyX=(Wire.read()<<8|Wire.read()) + GyXoff; GyY=(Wire.read()<<8|Wire.read()) + GyYoff; GyZ=(Wire.read()<<8|Wire.read()) + GyZoff; //read temperature data temp=(Wire.read()<<8|Wire.read()) + toff; tx=temp; t = tx/340 + 36.53; //tf = (t * 9/5) + 32; // farenhait //read gyro data AcX=(Wire.read()<<8|Wire.read()) + AcXoff; AcY=(Wire.read()<<8|Wire.read()) + AcYoff; AcZ=(Wire.read()<<8|Wire.read()) + AcYoff; //get pitch/roll getAngle(GyX,GyY,GyZ); Also I need change input to function to input Gy as values to pitch, because data is sensed from module in opposite to what this tutorial show. Now I have accurate data. Problem is whit this module, that Gyroscope don't have Z axis. There is only X and Y, and for my needs I need Z axis more then that X and Y for my project. Now I need think if I need use magnetic earth module to display Z rotation

Crazy question, but did you have the username cratos333 ever? I used to get codes from a guy

I'm surprised that it doesnt give any errors but it doesnt give me any good values. It just tells me the same values all the time. Can you explain that how i could fix this?

So the values I get are very inconsistent, when it is not moving at all it has a difference to the prvious one of up to 160. Can I somehow make this more accurate?

How do you change the accelerometer scale in the code? It seems like it is automatically set to +/-2g and I see no way of changing it.

How can I restrict the gyroscope to show reading in only one axis (y- axis)

Great project! You might want to use functions tho to make your code more reusable.

The z-axis of accelerometer of MPU6050 is not providing any range of values as the x and y axes, the z-axis readings just flicker upon tilting in the z-axis direction. How do I resolve this problem? I need the z-axis readings to vary as I tilt the device in z-axis direction.

I got error when i compile your code with Arduino Due 'call of overloaded 'beginTransmission(MPU_Type*)' is ambiguous'

Is there a way to connect, say, 7 of them to one arduino and get result values separately but fast enough that they are essentially at the same time, I guess what I am asking is, is there a way to change the i2c device id?

Thanks a lot ! It will help me a lot for a project !! :)

The code has an error in it.. The data being recalled has a temperature reading between the accel and the gyro data. This code fixes it and it also 1. converts the accel data to roll and pitch angles. 2. calculates the temperature in F and C 3. adds correction values for the accel and temp data. ====================== #include<Wire.h> #include <math.h> const int MPU=0x68; int16_t AcX,AcY,AcZ,Tmp,GyX,GyY,GyZ; double pitch,roll; void setup(){ Wire.begin(); Wire.beginTransmission(MPU); Wire.write(0x6B); Wire.write(0); Wire.endTransmission(true); Serial.begin(9600); } void loop(){ Wire.beginTransmission(MPU); Wire.write(0x3B); Wire.endTransmission(false); Wire.requestFrom(MPU,14,true); int AcXoff,AcYoff,AcZoff,GyXoff,GyYoff,GyZoff; int temp,toff; double t,tx,tf; //Acceleration data correction AcXoff = -950; AcYoff = -300; AcZoff = 0; //Temperature correction toff = -1600; //Gyro correction GyXoff = 480; GyYoff = 170; GyZoff = 210; //read accel data AcX=(Wire.read()<<8|Wire.read()) + AcXoff; AcY=(Wire.read()<<8|Wire.read()) + AcYoff; AcZ=(Wire.read()<<8|Wire.read()) + AcYoff; //read temperature data temp=(Wire.read()<<8|Wire.read()) + toff; tx=temp; t = tx/340 + 36.53; tf = (t * 9/5) + 32; //read gyro data GyX=(Wire.read()<<8|Wire.read()) + GyXoff; GyY=(Wire.read()<<8|Wire.read()) + GyYoff; GyZ=(Wire.read()<<8|Wire.read()) + GyZoff; //get pitch/roll getAngle(AcX,AcY,AcZ); //send the data out the serial port Serial.print("Angle: "); Serial.print("Pitch = "); Serial.print(pitch); Serial.print(" | Roll = "); Serial.println(roll); Serial.print("Temp: "); Serial.print("Temp(F) = "); Serial.print(tf); Serial.print(" | Temp(C) = "); Serial.println(t); Serial.print("Accelerometer: "); Serial.print("X = "); Serial.print(AcX); Serial.print(" | Y = "); Serial.print(AcY); Serial.print(" | Z = "); Serial.println(AcZ); Serial.print("Gyroscope: "); Serial.print("X = "); Serial.print(GyX); Serial.print(" | Y = "); Serial.print(GyY); Serial.print(" | Z = "); Serial.println(GyZ); Serial.println(" "); delay(333); } //convert the accel data to pitch/roll void getAngle(int Vx,int Vy,int Vz) { double x = Vx; double y = Vy; double z = Vz; pitch = atan(x/sqrt((y*y) + (z*z))); roll = atan(y/sqrt((x*x) + (z*z))); //convert radians into degrees pitch = pitch * (180.0/3.14); roll = roll * (180.0/3.14) ; }

Very good illustration, i have couple of questions please reply 1) please explain line 8,9 and 15 in the code? why wire.write 0x6B, 0 and 0x3B to MPU? 2) how do you know first requested 6 bytes are for acc and next 6 for gyro, how one can know, i explore google but could not find datasheet of Gy521.

So a quick question, i'm very new to programming and using Arduino first off. If i'd like to change the pin out from: SCL -> A5 SDA -> A4 to: SCL -> A3 SDA-> A2 What part of the code would I need to change? This is for a school project. Any help would be appreciated, Thank you very much. Cheers!

What is the reason for the bit shift and is that an ORing? in the lines like: AcX=Wire.read()<<8|Wire.read();