I order this piece thinking it will piece of cake loading a library in Arduino IDE and get precise position/orientation.
First the unit I got was labeled MPU-92/65 which made look for specific libraries. After several tries I gave up and wrote to hiletgo support. The replied in less than 12 hours with a library which was useful. I was able to verify that the unit was working. But some of the examples provided did not work. It made reference to a library in github that was unmaintained. But there, I was able to see that the unit works with the same library as the 9250. So I searched arduino IDE library management and found MPU9250 by hideakitai. Which worked fine and the example got all info from the unit. So, I should have tried that first.
Second, there is no easy way to get positions/orientation. You need to do a bit of research on what position really means, so you know what you really want, maybe do some calibrations, take into account that electronics and magnets nearby can change magnetometer readings (really!!), and so you probably will need some way to discard some fluctuations. So if you want to learn look up for a wiki page in github by the user kriswiner regarding MPU6050 and Affordable 9 DoF Sensor.
There is a catch, the SPI interface uses most of the same pins as I2C which means that pins are not clearly labeled for SPI.
In summary, it works, it have response from customer support and it is cheap... It looks like a good learning experience if you want that. If not, look for some more expensive unit that gives you the results. Adafruit have one absolute position unit that seems really good out of the box.
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This item: HiLetgo MPU9250 GY-9250 9-Axis 9 DOF 16 Bit Gyroscope Acceleration Magnetic Sensor 9-Axis Attitude +Gyro+Accelerator+Magnetometer Sensor Module IIC/SPI
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Defective item wasted entire day.
This small cheap piece of electronic costed me the entire day trying to debug what I initially thought was my fault. As you can see in the pic and what others have complained about too, is the accelerometer's Y value is stuck at one value. I tried this on an arm board before finally verifying it was defective with a tested and proven Arduino code. These things are too cheap to waste hours of your time by getting defective ones. This seller is selling it at premium price of over $9 when other places like ebay will sell you the exact same piece for less than $3. The least you could expect is good quality when you are paying THREE times the price. Yet you are getting a LESSER quality than a Chinese knock off. What a rip off. I don't usually write reviews but seeing how this few dollar item put my entire day in the trash, I'll make an exception. The least the seller could do before selling these things at premium prices is to verify it works!
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- Reviewed in the United States on August 5, 2021
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- Reviewed in the United States on December 29, 2018
- Reviewed in the United States on April 19, 2025
Top reviews from other countries
- MaciejReviewed in Australia on June 19, 2018
Still learning about advance functions of this module
I've bought this MPU module together with HiLetgo® TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board for Arduino. Similar to other reviewers, the unit I have received was MPU9255 instead of MPU9250, even though it was marked on the silkscreen as the latter. There is little information on the internet about MPU9255 besides the list of registers, but for the most part it works exactly as MPU9250. You only need to change the value read from WHO_AM_I register to 0x73 from 0x71 (this one's for MPU9250).MaciejStill learning about advance functions of this module
Reviewed in Australia on June 19, 2018
I have run the same example sketches on both Arduino Nano V3.0 and ESP8285 (nodeMCU, running Arduino sketch). With ESP8285 I have tested the module with both 5V and 3.3V and it worked flawless in both cases. When using ESP8285 you will need to specify which pins you are using for SDA and SCL when calling Wire.Begin.
On the photo you can see my test setup - as the OLED screen and MPU have different I2C addresses, I was able to hook them to the same pins. One issue was that OLED library is memory hungry, so when I added it to the MPU test sketch, I've run out of RAM (on Arduino). I had to comment out certain parts of the sketch to make its data fit in 2K, but after that it worked OK.
This is an advanced module with lots of sophisticated functionality, so to make full use you will need to spend some time learning it. I recommend reading Kris Winer's posts on sensor fusion and calibration and then carefully reading his example code. Overall I am very happy with this module, but I still have lots to learn to make most out of it.
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