【9-Axis Inclinometer Module】WT901 High-Accuracy Acceleration+Gyroscope+Angle (XY 0.05° Accuracy)+Electronic Compass with Kalman Filtering, MPU9250 200Hz AHRS IMU for PC/Android/Arduino

I find the reviews of this very confusing. Some say that the promised example code doesn't exist or that they weren't able to interface with the device due to lack of documentation. All of that is just plain wrong. If you actually read the manual it will point you to a github page that has been there since at least 2020. It has example code, instruction manuals, and all the interface information required to get these boards working.I took the example arduino code and copy and pasted it into a new sketch and it immediately worked, zero effort.I like this little board and especially the M0 ARM that you communicate with (instead of directly talking to the sensors).I talk to it via I2C but serial is also a good option if that fits your application better. The example Arudino code shows the registers in I2C to read for each available measurment.

I used UART. The software they recommend is very good and almost a must to easily configure the device, with a USB to UART cable. Amazing accuracy for the price, but very difficult to interface with.Their online code samples are not good at all, but you can make your own or find things on github.For Python I would recommend the pywitmotion library on GitHub. All the heavy lifting has been done and its easy to implement.

The device works very well. Software is easy to use and reports everything with good resolution and fast response time.The support team is also very quick and helpful. I had an issue getting an external GPS to connect but once I set the baud rate (both GPS and module) to 115200 per their suggestion it worked perfectly. They got back to me within an hour with exactly the info I needed.Planning to use this for telemetry on an RC car. Highly recommended!

The accelerometer seems to work fine, but the provided documentation is pretty bad, and the source code found on GitHub to get a head start has a ton of text and comments in Chinese, as an example:def FiledCalibration(device): device.BeginFiledCalibration() if input("请分别绕XYZ轴慢速转动一圈，三轴转圈完成后，结束校准（Y/N)？").lower()=="y": device.EndFiledCalibration() print("结束磁场校准")I'm not sure what this will do to the unit, and I'm not about to translate every single comment and string to English using e.g. Google Translate... willing to change the rating if the vendor fixes this, and provides all documentation and source examples in English.

Excellent job on how these guys have made such a complicated device so easy to use. There is a lot going on with the fusion algorithms that go into this and having done this myself with all the code that is involved in getting this to work, these guys have removed a lot of the complexity and provided a fairly easy-to-use interface. Very good documentation (assuming you can find it all) and good videos made it fairly straight forward to get it to work OOB (out-of-the-box) and calibrate it. From what I have seen from using competing devices, this by far is the easiest to use and get working - I highly recommend it! Having an I2C and a UART interface is a huge plus - doesn't take long to get it up and running and providing meaningful results.