Noob here - need help with wiring the MPU-9150 (gyro/accel) to the Uno

Using Arduino Sensors
#1

Hi, I need some help please with wiring the MPU-9150 breakout board to the Arduino Uno. I have the sketch that will be running on the Arduino from here: https://github.com/sparkfun/MPU-9150_Breakout/tree/master/firmware

From what I know so far, I only need to connect the following breakouts: GND, VCC, SDA, SCL.

I've searched the web but was not able to find a diagram for the MPU-9150.

Could anyone please either help with a diagram or walk me through the process? Thank you!

#2

The MPU-9150 is a new sensor, so you won't find many examples of it right now.

Do you have the Sparkfun breakout board ? https://www.sparkfun.com/products/11486

That board is for 3.3V only. Connect it like this: Arduino Uno <-> Sparkfun MPU-9150 breakout board GND <-> GND 3.3V <-> VCC A4 <-> SDA A5 <-> SCL 2 <-> INT Don't connect the other pins of the Sparkfun breakout board.

Run the i2c scanner, http://playground.arduino.cc/Main/I2cScanner

After that, use the code to interface the MPU-9150. The link by Sparkfun is a copy of the code by Jeff Rowberg. You better use his (newest) code from his website, http://www.i2cdevlib.com/ His code uses the interrupt, that is why pin 2 (=interrupt.0) of the Arduino Uno is used.

#3

Erdin, thank you for your speedy help. I do have the Sparkfun breakout board that you've referenced. I have all I need now!

#4

Thanks again! Here is the working link of the demo running: http://www.youtube.com/watch?v=74xL-VcRyjQ
Is there a point for me to create a graphical wire diagram for other noobs like myself?

#5

Very nice. You have a result very fast! Maybe you can thank Jeff Rowberg with a link to your video, http://www.i2cdevlib.com/contact

#6

Great idea! Just did.

#7

Hello dmelamed,

Looks great, Im having difficulty getting the g values from my 9150 (they all return 0) any chance of a peek at your code… or any hints as to how you got yours working, there’s very little on the web to help…

Thanks

#8

Read the posts above, about how to connect it and using the i2c scanner.

#9

Hey, I used the Arduino code from the examples that are provided by the chip manufacturer. Do you have that URL or would you like me to post it?

#10

Hi there,

I'm trying to do exactly what you've done in the video, but having trouble with getting it to display as a visualization. I've followed the instructions in the post above, so far this is what was done:

  • Connected everything correctly.
  • Run I2C successfully
  • Calculated roll pitch and yaw from the raw data (did you manually calculate or use another program)? All these values seem to be right.
  • Downloaded processing and FREEIMU, and placed the processing folder from FREEIMU into the processing libraries. Now what?
#11

hi dmelamed! Can you guide me to the link for the processing code?

Thanks.

#12

Hi, I also see that jrowberg has removed the mpu9150 example code from github. Any chance of someone knowing where I can find it?

https://github.com/jrowberg/i2cdevlib/tree/master/Arduino/MPU6050/Examples

#13

I search the examplecode for the MPU9150. The original example von Jeff Rowbwerg used "MPU6050_6Axis_MotionApps20.h". I did not found an example with "...9Axis...". Am i blind?

#14

MPU-9150 = MPU-6050 + compass.

You can use the MPU-6050 code, it is one of two chips inside. Jeff Rowberg started with code for the MPU-9150, but he removed it. I don't know why.

#15

Ok thanks for the quick answer. :)

Kucky

#16

Which option must be enabled to view the Teapotsketch? LG Kucky

#17

Now i get this Errors.
Compiling ‘Quad102’ for ‘Arduino Mega 2560 or Mega ADK’
Quad102.ino : In file included from
MPU6050_9Axis_MotionApps41.h : : In member function ‘uint8_t MPU6050::dmpInitialize()’:
MPU6050_9Axis_MotionApps41.h : ‘setXGyroOffsetUser’ was not declared in this scope
MPU6050_9Axis_MotionApps41.h : ‘setYGyroOffsetUser’ was not declared in this scope
MPU6050_9Axis_MotionApps41.h : ‘setZGyroOffsetUser’ was not declared in this scope
Error compiling
LGK

#18

The Mega 2560 board has onboard 10k pullup resistors to the 5V for the I2C. It is one of the very few boards with onboard pullup for the I2C. As a result, the I2C bus is a 5V bus.

If you connect the 3.3V MPU-9150 to it, the sensor might already be damaged (the sensor seems to allow up to 6V, but it is designed for 3.3V). You need a level shifter. I use these for my Mega board: http://www.ebay.com/sch/i.html?_sop=15&_osacat=0&_from=R40&LH_PrefLoc=2&_nkw=iic+i2c+level+module&_sacat=0

I think the Teapotsketch uses processing, but I have not tested that myself yet. Is the normal simple sketch running (the one without dmp) ?

#19

I have that Levelshifter.

http://www.ebay.de/itm/IIC-UART-level-Conversion-Module-Two-Way-Power-Meter-Protector-For-Arduino-5V-3V-/130963951751?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item1e7e0f5087

Is that OK? Must I 3V or 5V connector use? Best Regards Willi

#20

That is the level shifter I use on my Mega board. The 3V is an output, the board has a voltage regulator. It is actually 3.3V, which it should be.

From the Mega to one side of the level shifter: 5V, GND, SDA, SCL. The other side is output side of the level shifter for the 3.3V I2C bus to the sensor: 3V (3.3V), GND, and the 3.3V signals SDA and SCL.