Great video!! You've saved me so much time in ten minutes! I'm just a hobbiest but I appreciate your effort to explain this wonderful chip. You clearly know it very well, so thanks for taking the time to learn it, and post a really high quality video..
Thanks for the video. I got the following error message: IMU initialization unsuccessful Check IMU wiring or try cycling power Status: -5 What do I have to do?
I have the same issue, did you solve it? my wires are perfectly connected to the Arduino and the i2c_scanner says "I2C device found ... 0x68" so I think that my imu is working, please I need help :/
Can you help me / I have a problem: IMU unsuccessful initialization Check IMU wiring or try cycling power Status: -5 I looked at the code in the library, it seems that Check WHO_I_AM has an error.
my accelerometer & gyroscope are working fine, but magnetometer output is just 0.0000 for all three axes. It isn't changing whether I tilt it/bring a magnet near it or whatever. Do you have any idea what could be the problem? Only the Magnetic readings are 0.00 like this, the accelerometer & gyro readings are fine tho
Hey, I need help, I am getting the status of -5, and it's not working. I have very little knowledge of how this works and can not seem to figure out how to fix this
@@DuncIsAwesome I also have the same issue, i already ground the AD0, also FSYNC but nothing. I will check if I soldered the sensor properly. I also bought a new one.
This is awesome, thanks for sharing. I am able to get the output as instructed. Have you tried putting the magnetometer values into degrees? I actually want to get the direction 0-360 that my MPU-9250 is pointed towards. I tried looking it up myself and found to use: float Pi = 3.14159; float heading = (atan2(IMU.getMagY_uT(),IMU.getMagX_uT()) * (180/Pi)); if (heading == 0){ return; } if (heading < 0){ heading = heading + 360; } But.. this is not working for me.. as I move my MPU around it only gives values between 30-80.. If you haven't done this that is fine. I've just been struggling with this for a while now and thought you might have done this. Thanks
Hi! great video!! But I have a problem with the compilation of the code, the program does not throw any error but when compiling it, it gives me something like an encrypted text, could you help me?
You are a great teacher. Thank you for this video. However, I have a question, should the magnetometer be in one position or rotate it during calibrating. I've already written the code but I can't calibrate correctly. Best wishes Ania
Great video man but why I have this error: IMU initialization unsuccessful I mean I don´t know what it is, I don´t know if I warmed it too much when I soldered the pins ;(
Hi. Thank you making this very descriptive Tutorial! I have a question regarding this sensor. I want to make a PID algorithm for my robot using this sensor in order to prevent the robot from drifting away and letting it maintain a straight angle while moving forward. Do you mind teaching me about PID for this?
Once again thank you for the tutorial.. Previously the AOD4184 tutorial was a boost to my project and now this one... Hope that you'll update something on 3axis PID and calibration too... Edit 2: Finally I could buy the item after 2yrs.. Also I'm very glad I joined your channel, very informative and educational.
Hi, I checked the full library here github.com/bolderflight/invensense-imu/tree/main and did not find any text related to status =-5. Please see the examples folder and let me know which code you used to get the "-5" status.
set the serial monitor baud rate. in Serial.begin(9600), 9600 is the baud rate, make sure your serial monitor is set to same value. (it is in the lower right corner of serial monitor).
Hi, i have trouble with SPI connection this module to board Arduino mega 2560 becouse of small sample rate. I do lot of search on the internet, but all codes and libraries are not working for me. Do you have any idea what can i do? Dont you have any tutorial? Its for my Bachelor thesis where i need messure acceleration and gyro only with the sample rate about 1-2ksps. Thank for any help and apologise for my bad english :)
Thank you for this video . Can you tell me how I can calculate the range of motion by using the results of MPU9250 ? I am working in my project but I have a problem to calculate the range of motion … My project is Design and implementation of sensor based system for hand function assessment and analysis.. Please help me 😊
hello, i have the same module as this one and i tried different codes for it but i don't get any output change on the magnetotmeter, when i rotate it around the x,y,z axis a get and an output change on the accelerometer but i only have to shake the module along those axis to get an output bigger than 1 / -1 on the magnetometer in rest it is under -0.00 always Acceleration -1.300 2.095 -8.634 Gyrosvope -0.042 -0.042 -0.042 Magnetometer 44.918 29.959 5.411 and if it is possible i would like to use it to determine the rotation angle in degrees not the number from 0 to 8
have you run the I2C scanner? it you run it successfully and all wiring is good, the scanner should print the I2C address on the serial monitor. The I2C scanner is located here robojax.com/learn/arduino/?vid=robojax-I2C-scanner
Great Video! I have a question: I have BMP280 and MPU9250 Sensors. I need them to connect to Arduino UNO. Both the sensors use SDA/SCL pins. How can I integrate both the sensors with Arduino?
Create object with different name like sensor1, sensor2 and sensor3. and use them. You learn the use of object from this example th-cam.com/video/L6ekl2ABcuY/w-d-xo.html
@@robojax I wanted to ask how you have configured I2C master so you can read data from all 3 sensors by single reading. When I try so, ST2 reg doesn't get read therefore MAG doesn't update it's values.
@@flamingemu2 Hey man thanks a lot, many of these people had the same issue and the solution was always here xd, I'm going to tell them the solution :D
I have a question, I have followed every step of the experiment on your video. However, currently the value of the magnetometer does not appear, what about the solution? thank's sir
Hi thank you so much really appreciated. My question ia that once i compile the code of i2c_scanner so after compilation it gives me error that '#include no such file or directory ' . Please tell me how can i fix this error . I updated my arduino IDE to latest version but did'nt work . I also reinstall the library but all in vain .
Try the blink program from file, examples, basic, blink The error you are getting is very primitive and it should not happen. Reinstall arduino IDE ( the program itself)
You connected SDA and SCL on the uno to a device that is not 5v tolerant. OFC there is the stepdown converter for supply, but what about logic level? My Uno outputs 5v amplitude on sda and scl and im afraid I roasted my MPU. So basically HW setup on my side should be same as yours, but my mpu just doesnt connect as shown in the serial monitor which therefore only outputs 0s for each value of the 9 axes. Help would be appreciated... At least those things are cheap, so I can just buy a second one and see if I really roasted the first one and use a logic level conv. this time.
Fatal error:cstddef: no such file or directory. I am getting that error. When I delete the c includes. I get a cmath error in the eigen file. What causes this? I am trying to verify/compile the code.
just put the driver in the "my document\arudino\libraries" folder. so this module should have it's own folder with all files. Restart the Arduino IDE and it should work and you should see the examples. 100k people used the instruction shown in video and it works.
hello sir, i have a question why on i2c scanner you've got only 1 address (0x68) ? meanwhile on thats mpu-9250 has 9 DOF, which mean it should has 2 address : 1 address for accel & gyro (0x68), and 1 address for magnetometer (?)
This code is not working for me... It is showing 'no matching function for call to MPU9250_::MPU9250_(TwoWire&, int)' what should I do for this? Anyone?
Hey sir I am using an Mpu9250 for our upcoming project and while trying to test whether my sensor is working or not I tried putting on the code and it gave me errors like cstddef directory not found even tho the code dont have those line i wrote every code and it failed miserably. How can i contact you
This may be an incredibly silly question but do you absolutely need to solder the pinhead to the chip ? I tried putting the pinhead thorugh the chip and through a breadboard to make it fixed in place and I couldn't get the chip to work no matter what I tried.
works with all arduino. Just pay attention to the wiring to SDA and SLC pins. The pins are listed here for all boards www.arduino.cc/reference/en/language/functions/communication/wire/
@@robojax it reads. The aim of what I want to do is use that data for a DIY Vr. How do I extract it using the pro mini via a uart-serial connector. Is it possible,or must the pro mini be used as an HID(not supported by the pro mini)
I am completely new to using Arduino, and when I paste in this code my serial monitor prints this: ⸮`4⸮drye⸮⸮⸮⸮.⸮⸮⸮ does anyone know what this means? and what I should do? I followed the wiring directions on the website, and the code is directly copied from there as well
Hello, here is a video which is part of full Arduino course th-cam.com/video/WyWRGoACWFs/w-d-xo.html but ***** Free Arduino Course worth $200**** Arduino Step by Step Course (over 150 lectures) Starts here robojax.com/L/?id=338
Hi Robojax. Great project. Is it posible to export Serial.prints into some opentrack inputs (joystick input)? I have made some sort as EDtracker but there is only 3DOF.
Hi, thank you very much. I much appreciate the demo. My question is when the data is being outputted from the MPU-9250 and the data being sent in bits. Where does it say in the data sheet which bit is which so for example is the first 3 bit in the 10-bit data the accelerometer data?
your question needs another video, but in this file github.com/bolderflight/MPU9250/blob/master/src/MPU9250.h from line 196 to 223 you will see constants taken from Register map. You will see the register's name. Here is register map www.invensense.com/wp-content/uploads/2015/02/RM-MPU-9250A-00-v1.6.pdf I have just included this link to the page where you would find the code.
Hey Robojax, great video, this really helped. I just have one problem with the library... I am using ESP32 for MPU-9250 and want to use different Pins for SDA and SCL. Normally i would just set them with the function wire.begin(I2C_SDA, I2C_SCL, 9600). But I can't find any information on how to set pins in the .h/.cpp documents, can you tell me how to change these Pins with the library?
Hello, here is introduction to ESP32 video th-cam.com/video/--Fj8QDlGuQ/w-d-xo.html and in this video I've used I2C pins for LCD th-cam.com/video/COssWn4Pcm4/w-d-xo.html good luck
I have a question. Why, for get results in different axis and sensors, only is necessary to get information from Reg. 0x3B (.59) (acelerometer high X results), and what is the utility of the bit-to-bit operators like displacement
I saw other programs that do not use this library that also do the same. You do not need to read the ACCEL_XOUT_L, ACCEL_YOUT_H, ACCEL_YOUT_L, ACCEL_ZOUT_H, ACCEL_ZOUT_H, ACCEL_ZOUT_H, etc. registers (registers from 0x3C to 0x48, that is, 60 to 72 decimals) just read the ACCEL_XOUT_H and do bitwise operations. This is the registers map of the MPU9250: cdn.sparkfun.com/assets/learn_tutorials/5/5/0/MPU-9250-Register-Map.pdf
I borrow your code, but the value of acceleration isn't pretty like you. Namely, when chip is static, ax isn't 0 and az isn't -9.8. Do you know what is the probable reason? thanks a lot.
LOL. calibrate the accelerometer using this :calibrateAccel() it shows in library file here on line (after) 705 github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
here is my(your) code, the B part is same as A part, I guess I misuse the calibrateAccel() #include /* Advanced_I2C.ino Brian R Taylor brian.taylor@bolderflight.com Copyright (c) 2017 Bolder Flight Systems Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "MPU9250.h" // an MPU9250 object with the MPU-9250 sensor on I2C bus 0 with address 0x68 MPU9250 IMU(Wire,0x68); int status; void setup() { // serial to display data Serial.begin(115200); while(!Serial) {} // start communication with IMU status = IMU.begin(); if (status < 0) { Serial.println("IMU initialization unsuccessful"); Serial.println("Check IMU wiring or try cycling power"); Serial.print("Status: "); Serial.println(status); while(1) {} } // setting the accelerometer full scale range to +/-8G IMU.setAccelRange(MPU9250::ACCEL_RANGE_8G); // setting the gyroscope full scale range to +/-500 deg/s IMU.setGyroRange(MPU9250::GYRO_RANGE_500DPS); // setting DLPF bandwidth to 20 Hz IMU.setDlpfBandwidth(MPU9250::DLPF_BANDWIDTH_20HZ); // setting SRD to 19 for a 50 Hz update rate IMU.setSrd(19); } void loop() { // read the sensor IMU.readSensor(); // display the data //part A Serial.print("Ax: "); Serial.print(IMU.getAccelX_mss(),6); Serial.print("\t"); Serial.print("Ay: "); Serial.print(IMU.getAccelY_mss(),6); Serial.print("\t"); Serial.print("Az: "); Serial.println(IMU.getAccelZ_mss(),6); IMU.calibrateAccel(); //part B Serial.print("Ax: "); Serial.print(IMU.getAccelX_mss(),6); Serial.print("\t"); Serial.print("Ay: "); Serial.print(IMU.getAccelY_mss(),6); Serial.print("\t"); Serial.print("Az: "); Serial.println(IMU.getAccelZ_mss(),6); /*Serial.print(IMU.getGyroX_rads(),6); Serial.print("\t"); Serial.print(IMU.getGyroY_rads(),6); Serial.print("\t"); Serial.print(IMU.getGyroZ_rads(),6); Serial.print("\t");*/ /*Serial.print(IMU.getMagX_uT(),6); Serial.print("\t"); Serial.print(IMU.getMagY_uT(),6); Serial.print("\t"); Serial.print(IMU.getMagZ_uT(),6); Serial.println(); delay(1000); Serial.print("calibrateMag: "); IMU.calibrateMag(); Serial.print(IMU.getMagX_uT(),6); Serial.print("\t"); Serial.print(IMU.getMagY_uT(),6); Serial.print("\t"); Serial.print(IMU.getMagZ_uT(),6); Serial.println();*/ //Serial.println(IMU.getTemperature_C(),6); delay(200); }
My team is trying to use 9250 along with your code. The address on the 9250 is set to 0x68, but we get a status of -5 when we run the code. Looking at the .cpp file, we're getting the -5 because the IMU address is not 0x71 or 0x73. Any ideas?
@@robojax sorry for late reply. Thx for reassuring me. I've read some papers and mpu9250 datasheet and both have different Vcc input so that's why I had confusion
THANKS MAN. YOU HAVE A NEW SUBSCRIBER I hope you can help me. I am doing a project with this accelerometer and I would like to know: 1- the ADO pin is input, output or bidiraccional? I saw that you connect it to 5V. 2- FSYNC how does it work? To use it as in your example, should I connect it to GND?
You are welcome. 1-On the datasheet (in the same page as other resources) page 12 shows ADO is just address selector. 2-FSYNC is Frame synchronization digital input which can be used to synchronise with other data or system. page 18. I have not used it with other data or system so I don't know about it.
the module has temperature sensor but the library github.com/bolderflight/mpu9250 does not have that function. so it seems you are not using the library. Please use library, it will work.
which one did you download? download the one from Robojax.com then. I have provided both links. Try both. It has worked for 1000s of people. it should work.
that' why I am telling you to install the one provided from robojax.com as this library might have changed. That's why I try to keep the library at the time when I test the project.
@@robojax I've downloaded the library from the website and still does not work. Serial monitor shows the message: IMU initialization unsuccessful. Check IMU wiring or try cycling power
Hello, Thank you for the video and code. I connected the Arduino Uno, installed MPU9250 library, and run the code and face with this error: no matching function for call to 'MPU9250_:: MPU9250_(TwoWire&, int)' -- it shows this line of code: MPU9250 IMU(write,0x68) as the source of error. I would appreciate it if you could let me know how to solve this problem.
I have explined it two or three times. this video is for learning. Pay attention. I mentioned which pin goes where and then showed you. if you have a project to print it,t hen use fritzing from fritzin.org free softwared.
Thank u for the great explaination. I hav hard time understanding the sensor. Just a question, the gyroscope value shown fluctuate a lot, is there anyway to stabilize the value?
you are welcome. its very accurate and it is normal to fluctuate. you should get the average of 300 or 1000 measurement. Also you might need angle in degree but it shows 0.001° so round it or divide it to so you get 0.1°
Ok, now it's working. I bought a more expensive module. I get all the data, but the gyro and magnetometer don't seems to give me the right values... Excepted for the accelerometer and the thermometer Can I get these values in degrees ?
First run the I2C scanner (link is provided in the same page as the code) .It seems you there is issue with wiring. You should be getting I2C address when running I2C scanner. you can read about the error codes in the library in here at line 60 github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
@@robojax Thanks a lot, my problem was that I can't communicate with the mpu through the default address which is 0x68 the sloshing was to connect the ADO pin to 5v and change the address to 0x69 to establish the communication. Thanks again for the video brother.
Hi so I followed the steps, but for me it says MPU failed and then check connection followed by different symbols and letters. I checked the wiring and tested if my arduino can check if I2C devices are connected. Please let me know to why different symbols appear. Thanks.
This was a fantastic demo. I want to use a magnetometer for the measurement of a delta in any direction to essentially detect movement of x mm. Is the 9250 more than I need ? Is there a magnetometer on a board or shield for the Uno that would be enough ? or even a Hall effect sensor with the ability to quantify distance ?
Really helpful demo!! I do have one question, can I get distance measurements using MPU9250?? One of my projects involve calculating the distance travelled (in x and y direction) with reference to a fixed value.
Thank you. You may use it with other means to get accurate measurement. See this page: www.researchgate.net/post/Calculating_Speed_and_Distance_from_a_3-axis_accelerometer
Beautifully explained! Congrats, pal! Could you please put some light on the usage of the FSYNC pin? I need to place 4 modules on different parts of a human body in order to measure the relative accelerations between them (e.g. arm vs forearm, forearm vs hand and arm vs hand). So, I would like to know if the FSYNC pin can be used in order to put the 4 modules to yield synchronized measurements.
Thank you. The FSYNC is : Frame synchronization digital input. Connect to GND if unused. Please see datasheet www.invensense.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf
Here it shows in page 27 www.invensense.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf it is the Frame Syncronization with external sensor if you use. Connect to GND if not used.
Here is the library file and it shows it has calibration function (method). Just search "calibrate" I believe every time you boot, it does it with reference to the current position github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
Hello, thank you for the video, it's amazingly clear and useful. I just have one problem. When I run the I2C scanner code with both my arduino UNO and the MPU-9250 properly connected and then open Tools > serie monitor, I can only see this: "I2C Scanner Scanning..." And no matter how long I wait, it doesn't say anything more... it doesn't say "no I2C device found" nor those lines that appear on the video. If you can help me to find out what's the problem, I would be immensely thankful.
Hello and you are welcome. I am not sure why it does that. if you are trying A4 and A5, try the pins on the other side close to pin 13. You should have SDA and SCL pins. Also check the wiring again.
@@robojax I already located the problem, the MPU-9250 male-male coupler was making false contact. Soldering the part fixed it. Thank you very much anyway!
Thanks for the video. I have a question? what i should change to get the gyro data in degrees? and also i need the value to be maintained in its new position. Pls help!!!
get the value and use Radian to degree formula 1° = π/180° = 0.005555556π so multiply the value you are getting in radian by 0.0174533 and this is not exact.
@@robojax thanks for your reply. After rotation about the z axis(gyroZ) there is a reflection in the value but soon it becomes 0 (it attains the new place as the basic position). How to make the reflective value to be fixed in the new position???
Really love this mate, very good explanation. Can you maybe tell me how you access and write to the different registers, to select modes for the different sensors in the chips? Thanks anyways for the video, and you're good at explaining yourself in english, probs for that!
Thank you very much. I love you too. For the register reading, the library is facilitating it. The file MPU9250.h and MPU9250.cpp located github.com/bolderflight/MPU9250/blob/master/src/MPU9250.h uses registers List of registers www.invensense.com/wp-content/uploads/2017/11/RM-MPU-9250A-00-v1.6.pdf . the main function(method) that makes the reading is in line 1004 in here github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
Hi thank's for the very good video. I did some try but I get the compiling error for the line 27 MPU9250 IMU(Wire,0x68); as follows "Wire was not declared in this scope". The library is well included in the arduino directory. Can You help me to fix it? I am quite a beginner... Thank's in advance....
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I have a project that needs an accelerometer/gyro to be implemented. I am not an engineer. Can I offer to hire you to work on my project with me ?
Great video!! You've saved me so much time in ten minutes! I'm just a hobbiest but I appreciate your effort to explain this wonderful chip. You clearly know it very well, so thanks for taking the time to learn it, and post a really high quality video..
You are welcome and thank you for your kind comment. I am glad you found it useful.
Thanks for the video. I got the following error message:
IMU initialization unsuccessful
Check IMU wiring or try cycling power
Status: -5
What do I have to do?
it clearly says "check wiring"
I have the same issue, did you solve it? my wires are perfectly connected to the Arduino and the i2c_scanner says "I2C device found ... 0x68" so I think that my imu is working, please I need help :/
you have to ground AD0 !
@@ocsner5687 have you solved it?
@@ocsner5687 i've connected ADO to GND, but get the same message
Can you help me / I have a problem:
IMU unsuccessful initialization
Check IMU wiring or try cycling power
Status: -5
I looked at the code in the library, it seems that Check WHO_I_AM has an error.
Hi, Search for "-5" in the library here github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp and you will find multiple reasons.
my accelerometer & gyroscope are working fine, but magnetometer output is just 0.0000 for all three axes. It isn't changing whether I tilt it/bring a magnet near it or whatever. Do you have any idea what could be the problem? Only the Magnetic readings are 0.00 like this, the accelerometer & gyro readings are fine tho
and what was the problem?
9250 device id at who i am register is 0x71, for 6500 it is 0x68 also can be 0x69 upon pulling up AD0 pin
Hey, I need help, I am getting the status of -5, and it's not working. I have very little knowledge of how this works and can not seem to figure out how to fix this
Check wiring. It does not find the module , either bad wiring or dead module
@@robojax I have checked the wiring and have tried 2 different boards and still get -5
@@DuncIsAwesome I also have the same issue, i already ground the AD0, also FSYNC but nothing. I will check if I soldered the sensor properly. I also bought a new one.
This is awesome, thanks for sharing. I am able to get the output as instructed.
Have you tried putting the magnetometer values into degrees? I actually want to get the direction 0-360 that my MPU-9250 is pointed towards.
I tried looking it up myself and found to use:
float Pi = 3.14159;
float heading = (atan2(IMU.getMagY_uT(),IMU.getMagX_uT()) * (180/Pi));
if (heading == 0){
return;
}
if (heading < 0){
heading = heading + 360;
}
But.. this is not working for me.. as I move my MPU around it only gives values between 30-80..
If you haven't done this that is fine. I've just been struggling with this for a while now and thought you might have done this.
Thanks
Hi! great video!! But I have a problem with the compilation of the code, the program does not throw any error but when compiling it, it gives me something like an encrypted text, could you help me?
when it comes to error, please provide the error so other read and help you.
You are a great teacher. Thank you for this video. However, I have a question, should the magnetometer be in one position or rotate it during calibrating. I've already written the code but I can't calibrate correctly. Best wishes Ania
You are welcome. that is very kind of you. During the calibration you should not move it at all.
Great video man but why I have this error: IMU initialization unsuccessful I mean I don´t know what it is, I don´t know if I warmed it too much when I soldered the pins ;(
it could be the wiring. check them again and again.
Great job mate! Very good demonastration , you explained everything perfect.
Pleased to know. Cheers
I tried to use the code but it gives me the error : No matching function for call to 'MPU9250_::MPU9250_(TwoWire&,int)' , do you have any ideas?
Hi. Thank you making this very descriptive Tutorial! I have a question regarding this sensor. I want to make a PID algorithm for my robot using this sensor in order to prevent the robot from drifting away and letting it maintain a straight angle while moving forward. Do you mind teaching me about PID for this?
Can I use the MPU9250 compass to place a setpoint and make the board showing this point ?
I am not sure sorry.
Once again thank you for the tutorial..
Previously the AOD4184 tutorial was a boost to my project and now this one...
Hope that you'll update something on 3axis PID and calibration too...
Edit 2: Finally I could buy the item after 2yrs..
Also I'm very glad I joined your channel, very informative and educational.
Hi, I'm getting an error where status = -5. Any idea what would cause this?
Hi, I checked the full library here github.com/bolderflight/invensense-imu/tree/main and did not find any text related to status =-5. Please see the examples folder and let me know which code you used to get the "-5" status.
hi there! i get this H⸮⸮⸮Z6⸮ kind of symbols when iconnect everything. Please help!
set the serial monitor baud rate. in Serial.begin(9600), 9600 is the baud rate, make sure your serial monitor is set to same value. (it is in the lower right corner of serial monitor).
Hi, i have trouble with SPI connection this module to board Arduino mega 2560 becouse of small sample rate. I do lot of search on the internet, but all codes and libraries are not working for me. Do you have any idea what can i do? Dont you have any tutorial? Its for my Bachelor thesis where i need messure acceleration and gyro only with the sample rate about 1-2ksps. Thank for any help and apologise for my bad english :)
thank you sir you explained well.
You are welcome.
Thank you for this video .
Can you tell me how I can calculate the range of motion by using the results of MPU9250 ?
I am working in my project but I have a problem to calculate the range of motion …
My project is Design and implementation of sensor based system for hand function assessment and analysis..
Please help me 😊
best IMU video thanks, sooo basic
You are welcome. Please subscribe. I appreciate it and helps my channel grow. Thank you
hello, i have the same module as this one and i tried different codes for it but i don't get any output change on the magnetotmeter, when i rotate it around the x,y,z axis a get and an output change on the accelerometer but i only have to shake the module along those axis to get an output bigger than 1 / -1 on the magnetometer in rest it is under -0.00 always
Acceleration -1.300 2.095 -8.634
Gyrosvope -0.042 -0.042 -0.042
Magnetometer 44.918 29.959 5.411
and if it is possible i would like to use it to determine the rotation angle in degrees not the number from 0 to 8
My serial monitor only says this:
IMU initialization unsuccessful
Check IMU wiring or try cycling power
Status: -5
Any ideas? ):
have you run the I2C scanner? it you run it successfully and all wiring is good, the scanner should print the I2C address on the serial monitor. The I2C scanner is located here robojax.com/learn/arduino/?vid=robojax-I2C-scanner
Gr8 but use serial plotter instead of text output
Great Video!
I have a question: I have BMP280 and MPU9250 Sensors. I need them to connect to Arduino UNO. Both the sensors use SDA/SCL pins. How can I integrate both the sensors with Arduino?
Just connect them together. You can connect 128 devices in parallel to I2C
Have you managed to collect data from all 3 sensors with the same data rate?
Create object with different name like sensor1, sensor2 and sensor3. and use them. You learn the use of object from this example th-cam.com/video/L6ekl2ABcuY/w-d-xo.html
@@robojax I wanted to ask how you have configured I2C master so you can read data from all 3 sensors by single reading. When I try so, ST2 reg doesn't get read therefore
MAG doesn't update it's values.
Hi, I'm getting an error where status = -14. Any idea what would cause this?
I figured it out. You have to ground ad0
@@flamingemu2
Hey man thanks a lot, many of these people had the same issue and the solution was always here xd, I'm going to tell them the solution :D
I have a question, I have followed every step of the experiment on your video. However, currently the value of the magnetometer does not appear, what about the solution?
thank's sir
not should you face such issue. may be you have deleted the lines for magnetometer. start with fresh code without any changes.
Hi thank you so much really appreciated.
My question ia that once i compile the code of i2c_scanner so after compilation it gives me error that '#include no such file or directory ' .
Please tell me how can i fix this error .
I updated my arduino IDE to latest version but did'nt work .
I also reinstall the library but all in vain .
Try the blink program from file, examples, basic, blink
The error you are getting is very primitive and it should not happen. Reinstall arduino IDE ( the program itself)
You connected SDA and SCL on the uno to a device that is not 5v tolerant. OFC there is the stepdown converter for supply, but what about logic level? My Uno outputs 5v amplitude on sda and scl and im afraid I roasted my MPU. So basically HW setup on my side should be same as yours, but my mpu just doesnt connect as shown in the serial monitor which therefore only outputs 0s for each value of the 9 axes. Help would be appreciated... At least those things are cheap, so I can just buy a second one and see if I really roasted the first one and use a logic level conv. this time.
you are right. But maximum tolerance of 9250 is 4V while Arduino UNO wiht 5V VCC, outputs os 60% of supply or approxmately 3.5V at sDA and SCL.
Fatal error:cstddef: no such file or directory.
I am getting that error. When I delete the c includes. I get a cmath error in the eigen file. What causes this? I am trying to verify/compile the code.
I just checked the code I've shown in video, it should not have that. try using the library from robojax.com. on the same page there is link for it.
how to install manually mpu9250 library? i've tried but it doesnt work. could you tell me
just put the driver in the "my document\arudino\libraries" folder. so this module should have it's own folder with all files. Restart the Arduino IDE and it should work and you should see the examples. 100k people used the instruction shown in video and it works.
hello sir, i have a question
why on i2c scanner you've got only 1 address (0x68) ? meanwhile on thats mpu-9250 has 9 DOF, which mean it should has 2 address : 1 address for accel & gyro (0x68), and 1 address for magnetometer (?)
Hello, everything on the module has one address .
@@robojax really? but i have gy 91 which is 10 dof (3 accel, 3 gyro, 3 magnitude, 1 compass) has 2 address, 1 address for 0x68 and 0x76
Beklager så mye her ble det mye overvåkning😮
Videoene mine er for læring.
great video ... i m getting acceleration and gyrometer value but my magnetometer value is always zero so please help me in this regards.
%100 same do you know the solution?
do u know program spi arduino?
Just search on Bing.com for “mpu-9250 SPI GitHub arduino “ I am sure you will find so many.
This code is not working for me... It is showing 'no matching function for call to MPU9250_::MPU9250_(TwoWire&, int)' what should I do for this? Anyone?
Yes. It means you did not follow my instruction in the video. You have not downloaded and installed the library.
I was hoping to see yaw pitch roll examples. Especially z drift correct with the magnetometer. :(
this is general explanation. if you want to use it for airplane or drone, then you need to spend some times to make it work.
Hey sir I am using an Mpu9250 for our upcoming project and while trying to test whether my sensor is working or not I tried putting on the code and it gave me errors like cstddef directory not found even tho the code dont have those line i wrote every code and it failed miserably. How can i contact you
How can I make a compass, and the serial monitor print degrees ? Please help me, that for a project...
(sorry for the spelling, I'm french : )
making compass is a complete project and I have to make a video if time permit.
why am i getting I2C not detected again and again? I've triple checked the wiring
Something must be seeing . If you have multimeter check the voltage of the module to see if it is getting power.
It didn't work for me i displays no xyz cordinates in the serial monitor
does it print any or nothing at all? it should say something at the beginning when you open the serial monitor.
Wow, thanks for everything. This is a very useful video! well done sir. Cheers, Lucius
Hi how can I get to calibration of MPU9250? we use on the model satellite can you please help us about this? we have some problem
Hi, Calibration is included with the library. See is on this page github.com/bolderflight/MPU9250
why is your gyro angle so small, even when I rotate 180 degrees it is less than 10 thanks a lot
You must have set the unit differently may be it is set to radian
Hi Robojax, will you be able to share the labVIEW code for this?
Hi, this code works only with Arduino.
IMU initialization unsuccessful
Check IMU wiring or try cycling power
Status: -5
i have this error!! helpme
I2C address is not found. wiring is bad.
i used a code for watch the address i2c is 0x68. but i though that the object imu is wrong!!
You're incredible dude, you saved me sooooo much datasheet scouring
How can I open the COM11 file? The file that is showing us the real time values?
sorry "COM11" file? or port? if you are referring to the port, you can learn it from this video th-cam.com/video/4OOFlS75owA/w-d-xo.html
This may be an incredibly silly question but do you absolutely need to solder the pinhead to the chip ? I tried putting the pinhead thorugh the chip and through a breadboard to make it fixed in place and I couldn't get the chip to work no matter what I tried.
No question is silly. No you don’t. Just solder the wires directly on the board.
Does this work with the Arduino pro mini
works with all arduino. Just pay attention to the wiring to SDA and SLC pins. The pins are listed here for all boards www.arduino.cc/reference/en/language/functions/communication/wire/
@@robojax it reads. The aim of what I want to do is use that data for a DIY Vr. How do I extract it using the pro mini via a uart-serial connector. Is it possible,or must the pro mini be used as an HID(not supported by the pro mini)
I am completely new to using Arduino, and when I paste in this code my serial monitor prints this:
⸮`4⸮drye⸮⸮⸮⸮.⸮⸮⸮
does anyone know what this means? and what I should do? I followed the wiring directions on the website, and the code is directly copied from there as well
Hello, here is a video which is part of full Arduino course th-cam.com/video/WyWRGoACWFs/w-d-xo.html but
***** Free Arduino Course worth $200****
Arduino Step by Step Course (over 150 lectures) Starts here robojax.com/L/?id=338
The code will have something like " Serial.begin(115200);" you need your serial monitor to match that
Doesn't this need a level shifter since the MPU9250 operates on 3V3 logic?
very interesting point. But the logic level is not necessary 3.3V as shown here invensense.tdk.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf
@@robojax Which part exactly? I'm building a flight tracker for my undergraduate thesis and all of my other boards require level shifters.
I have a problem with the code. It gives me an error in MPU9250 IMU(Wire,0x68);
this is not enough. give you error saying what?
@@robojax
No matching function for call to 'MPU9250_::MPU9250_(TwoWire&, int)'
Hi Robojax. Great project. Is it posible to export Serial.prints into some opentrack inputs (joystick input)? I have made some sort as EDtracker but there is only 3DOF.
Hi, Thanks. I have never heard of EDtracker .
Do you have SPI based code for MPU9250 and arduino ?
not at the moments.
@Robojax ,when i run the i2c scanner ,no address is being detected. plz help.
dont u have to connect pull up resistors?
I am sorry for late reply. I was on vacation. Your wiring must be incorrect or you pins are not bad.
Hi, thank you very much. I much appreciate the demo.
My question is when the data is being outputted from the MPU-9250 and the data being sent in bits. Where does it say in the data sheet which bit is which so for example is the first 3 bit in the 10-bit data the accelerometer data?
your question needs another video, but in this file github.com/bolderflight/MPU9250/blob/master/src/MPU9250.h from line 196 to 223 you will see constants taken from Register map. You will see the register's name. Here is register map www.invensense.com/wp-content/uploads/2015/02/RM-MPU-9250A-00-v1.6.pdf I have just included this link to the page where you would find the code.
@@robojax Amazing! Thanks for the help!
Hey Robojax, great video, this really helped.
I just have one problem with the library... I am using ESP32 for MPU-9250 and want to use different Pins for SDA and SCL.
Normally i would just set them with the function wire.begin(I2C_SDA, I2C_SCL, 9600). But I can't find any information on how to set pins in the .h/.cpp documents, can you tell me how to change these Pins with the library?
Hello, here is introduction to ESP32 video th-cam.com/video/--Fj8QDlGuQ/w-d-xo.html and in this video I've used I2C pins for LCD th-cam.com/video/COssWn4Pcm4/w-d-xo.html good luck
I have a question. Why, for get results in different axis and sensors, only is necessary to get information from Reg. 0x3B (.59) (acelerometer high X results), and what is the utility of the bit-to-bit operators like displacement
I saw other programs that do not use this library that also do the same. You do not need to read the ACCEL_XOUT_L, ACCEL_YOUT_H, ACCEL_YOUT_L, ACCEL_ZOUT_H, ACCEL_ZOUT_H, ACCEL_ZOUT_H, etc. registers (registers from 0x3C to 0x48, that is, 60 to 72 decimals) just read the ACCEL_XOUT_H and do bitwise operations.
This is the registers map of the MPU9250: cdn.sparkfun.com/assets/learn_tutorials/5/5/0/MPU-9250-Register-Map.pdf
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I borrow your code, but the value of acceleration isn't pretty like you.
Namely, when chip is static, ax isn't 0 and az isn't -9.8. Do you know what is the probable reason?
thanks a lot.
LOL. calibrate the accelerometer using this :calibrateAccel() it shows in library file here on line (after) 705 github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
@@robojax thanks for your answer !
But i still confuse after I read the library.
Can I ask how to use calibrateAccel()？
here is my(your) code, the B part is same as A part, I guess I misuse the calibrateAccel()
#include
/*
Advanced_I2C.ino
Brian R Taylor
brian.taylor@bolderflight.com
Copyright (c) 2017 Bolder Flight Systems
Permission is hereby granted, free of charge, to any person obtaining a copy of this software
and associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "MPU9250.h"
// an MPU9250 object with the MPU-9250 sensor on I2C bus 0 with address 0x68
MPU9250 IMU(Wire,0x68);
int status;
void setup() {
// serial to display data
Serial.begin(115200);
while(!Serial) {}
// start communication with IMU
status = IMU.begin();
if (status < 0) {
Serial.println("IMU initialization unsuccessful");
Serial.println("Check IMU wiring or try cycling power");
Serial.print("Status: ");
Serial.println(status);
while(1) {}
}
// setting the accelerometer full scale range to +/-8G
IMU.setAccelRange(MPU9250::ACCEL_RANGE_8G);
// setting the gyroscope full scale range to +/-500 deg/s
IMU.setGyroRange(MPU9250::GYRO_RANGE_500DPS);
// setting DLPF bandwidth to 20 Hz
IMU.setDlpfBandwidth(MPU9250::DLPF_BANDWIDTH_20HZ);
// setting SRD to 19 for a 50 Hz update rate
IMU.setSrd(19);
}
void loop() {
// read the sensor
IMU.readSensor();
// display the data
//part A
Serial.print("Ax: ");
Serial.print(IMU.getAccelX_mss(),6);
Serial.print("\t");
Serial.print("Ay: ");
Serial.print(IMU.getAccelY_mss(),6);
Serial.print("\t");
Serial.print("Az: ");
Serial.println(IMU.getAccelZ_mss(),6);
IMU.calibrateAccel();
//part B
Serial.print("Ax: ");
Serial.print(IMU.getAccelX_mss(),6);
Serial.print("\t");
Serial.print("Ay: ");
Serial.print(IMU.getAccelY_mss(),6);
Serial.print("\t");
Serial.print("Az: ");
Serial.println(IMU.getAccelZ_mss(),6);
/*Serial.print(IMU.getGyroX_rads(),6);
Serial.print("\t");
Serial.print(IMU.getGyroY_rads(),6);
Serial.print("\t");
Serial.print(IMU.getGyroZ_rads(),6);
Serial.print("\t");*/
/*Serial.print(IMU.getMagX_uT(),6);
Serial.print("\t");
Serial.print(IMU.getMagY_uT(),6);
Serial.print("\t");
Serial.print(IMU.getMagZ_uT(),6);
Serial.println();
delay(1000);
Serial.print("calibrateMag: ");
IMU.calibrateMag();
Serial.print(IMU.getMagX_uT(),6);
Serial.print("\t");
Serial.print(IMU.getMagY_uT(),6);
Serial.print("\t");
Serial.print(IMU.getMagZ_uT(),6);
Serial.println();*/
//Serial.println(IMU.getTemperature_C(),6);
delay(200);
}
My team is trying to use 9250 along with your code. The address on the 9250 is set to 0x68, but we get a status of -5 when we run the code. Looking at the .cpp file, we're getting the -5 because the IMU address is not 0x71 or 0x73. Any ideas?
first run I2C scanner to get the address. Then use it. We've provided the I2C scanner on the same page where the code is.
how did you solve it?
thanks for the video sr but how to calibrate the mpu 9250 accelerometer ? do you have a sample code?
no I don't. Sorry. Perhaps others will reply if they can help.
please make a video on how to calibrate the accelerometers, gyroscopes and magnetometers
Thanks for the suggestion. I will see if time permit, I will do it.
So is it really ok to connect vcc to 5v? Bcz mine suddenly become 0 output for every sensor after connecting it to 5v for a while
Yes. Really. it has voltage regulator on the module. I have crated illustration image here robojax.com/node/931
You didn’t reply? I spent about an hour to make the diagram so you understand it better.
@@robojax sorry for late reply. Thx for reassuring me. I've read some papers and mpu9250 datasheet and both have different Vcc input so that's why I had confusion
how to make this imu on matlab ?
Hey, Im doing the same project as you. Have you come up with any solutions yet? if Yes could you share. Thanks!
Hello, I've a question: is the value of the compass accurate ? Do the values changes from time to time, or are these stady and stable ?
hello, I have provided the datasheet. Your question is very tricky. it is called divation over time. So it should be on datasheet.
THANKS MAN. YOU HAVE A NEW SUBSCRIBER
I hope you can help me. I am doing a project with this accelerometer and I would like to know:
1- the ADO pin is input, output or bidiraccional? I saw that you connect it to 5V.
2- FSYNC how does it work? To use it as in your example, should I connect it to GND?
You are welcome.
1-On the datasheet (in the same page as other resources) page 12 shows ADO is just address selector.
2-FSYNC is Frame synchronization digital input which can be used to synchronise with other data or system. page 18. I have not used it with other data or system so I don't know about it.
I am only getting temparature value. What may be the issue?
the module has temperature sensor but the library github.com/bolderflight/mpu9250 does not have that function. so it seems you are not using the library. Please use library, it will work.
@@robojax getting negetive value for IMU.begin. what may be the issues
how can I get yaw pitch roll data from the sensor?
you can get them when you implement PID controller so the drone or airplane is stabilized.
This code doesn't work. It shows in Serial Monitor: Check IMU wiring or try cycling power
which one did you download? download the one from Robojax.com then. I have provided both links. Try both. It has worked for 1000s of people. it should work.
@@robojax I downloaded the one from this page: github.com/bolderflight/MPU9250 OBS: I'm using arduino mega.
that' why I am telling you to install the one provided from robojax.com as this library might have changed. That's why I try to keep the library at the time when I test the project.
@@robojax I've downloaded the library from the website and still does not work. Serial monitor shows the message: IMU initialization unsuccessful.
Check IMU wiring or try cycling power
Hey Robojax can you turn this into a mouse? I have a Pro Micro w/ a mpu9250 and i just can't get the code right
I have not worked on it but with some efforts it should work.
Excellent Video.
Very well explained, however I have a question, how to convert the angle into degrees? I need to know the position of the steering wheel of a car
1Rad × 180/π = 57.296Deg so whatever value you have multiply it by 57.296 to get degree.
Hello, Thank you for the video and code. I connected the Arduino Uno, installed MPU9250 library, and run the code and face with this error: no matching function for call to 'MPU9250_:: MPU9250_(TwoWire&, int)' -- it shows this line of code: MPU9250 IMU(write,0x68) as the source of error. I would appreciate it if you could let me know how to solve this problem.
It means the library is not installed
I have same problem . are you solve this problem .. can u help me
IS there a code available for it to work with raspberry pie
It should be but I am not aware of it.
9:23 Wiring
I have explined it two or three times. this video is for learning. Pay attention. I mentioned which pin goes where and then showed you. if you have a project to print it,t hen use fritzing from fritzin.org free softwared.
Thank u for the great explaination. I hav hard time understanding the sensor. Just a question, the gyroscope value shown fluctuate a lot, is there anyway to stabilize the value?
you are welcome. its very accurate and it is normal to fluctuate. you should get the average of 300 or 1000 measurement. Also you might need angle in degree but it shows 0.001° so round it or divide it to so you get 0.1°
Ok, now it's working. I bought a more expensive module. I get all the data, but the gyro and magnetometer don't seems to give me the right values... Excepted for the accelerometer and the thermometer
Can I get these values in degrees ?
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The gyroscope values are in degrees.
please help I'm getting this
"IMU initialization unsuccessful
Check IMU wiring or try cycling power
Status: -1
"
First run the I2C scanner (link is provided in the same page as the code) .It seems you there is issue with wiring. You should be getting I2C address when running I2C scanner.
you can read about the error codes in the library in here at line 60 github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
@@robojax Thanks a lot, my problem was that I can't communicate with the mpu through the default address which is 0x68 the sloshing was to connect the ADO pin to 5v and change the address to 0x69 to establish the communication.
Thanks again for the video brother.
You are welcome. I am glad the issue is resolved.
My status never gets positive, what is the mistake ?
when powering it up, make sure the module does not move and it is flat on the surface. Sensor is facing up.
Hi so I followed the steps, but for me it says MPU failed and then check connection followed by different symbols and letters. I checked the wiring and tested if my arduino can check if I2C devices are connected. Please let me know to why different symbols appear. Thanks.
Your serial monitor has incorrect baud rate. see it here snag.gy/y3pKwG.jpg either fixt the code or fix the serial monitor
The code will have something like " Serial.begin(115200);" you need your serial monitor to match that
This was a fantastic demo. I want to use a magnetometer for the measurement of a delta in any direction to essentially detect movement of x mm. Is the 9250 more than I need ? Is there a magnetometer on a board or shield for the Uno that would be enough ? or even a Hall effect sensor with the ability to quantify distance ?
How to connect with stm32f407
I believe you this code should work. I have not tested it.
Really helpful demo!! I do have one question, can I get distance measurements using MPU9250?? One of my projects involve calculating the distance travelled (in x and y direction) with reference to a fixed value.
Thank you. You may use it with other means to get accurate measurement. See this page: www.researchgate.net/post/Calculating_Speed_and_Distance_from_a_3-axis_accelerometer
how it work with arduino mega ??? can you explain it with arduino mega ???
share with us the code for arduino mega ?
Same thing. it should work. just pay attention to SDA or SCL
Beautifully explained! Congrats, pal! Could you please put some light on the usage of the FSYNC pin? I need to place 4 modules on different parts of a human body in order to measure the relative accelerations between them (e.g. arm vs forearm, forearm vs hand and arm vs hand). So, I would like to know if the FSYNC pin can be used in order to put the 4 modules to yield synchronized measurements.
Thank you. The FSYNC is : Frame synchronization digital input. Connect to GND if unused. Please see datasheet www.invensense.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf
I want to make the gyro change to zero when the sensor stops, can anyone help me?
The sensor never stops. The gyro is constantly working.
@@robojax not the sensor, but when the module stop
mpu9250 IO voltage is equal to VDD which would be 3.3 as shown in the video. Is it safe to use with arduino uno which works with 5v IO voltage
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@@robojax I figured it out myself, I2c interface pins are open-drain type and sensor board has 3.3v pull-ups. 3.3 v high is enough for arduino input.
@@robojax can you tell the purpose of fsync pin?
Here it shows in page 27 www.invensense.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf it is the Frame Syncronization with external sensor if you use. Connect to GND if not used.
Can I use the same code for ESP32?
I haven't tested it but it whould work.
How to calibrate the accel, gyro and compass?? Thank you
Here is the library file and it shows it has calibration function (method). Just search "calibrate" I believe every time you boot, it does it with reference to the current position github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
Hello, thank you for the video, it's amazingly clear and useful.
I just have one problem. When I run the I2C scanner code with both my arduino UNO and the MPU-9250 properly connected and then open Tools > serie monitor, I can only see this:
"I2C Scanner
Scanning..."
And no matter how long I wait, it doesn't say anything more... it doesn't say "no I2C device found" nor those lines that appear on the video.
If you can help me to find out what's the problem, I would be immensely thankful.
Hello and you are welcome. I am not sure why it does that. if you are trying A4 and A5, try the pins on the other side close to pin 13. You should have SDA and SCL pins. Also check the wiring again.
@@robojax I already located the problem, the MPU-9250 male-male coupler was making false contact. Soldering the part fixed it. Thank you very much anyway!
Thanks for the video. I have a question? what i should change to get the gyro data in degrees? and also i need the value to be maintained in its new position.
Pls help!!!
get the value and use Radian to degree formula 1° = π/180° = 0.005555556π so multiply the value you are getting in radian by 0.0174533 and this is not exact.
@@robojax thanks for your reply. After rotation about the z axis(gyroZ) there is a reflection in the value but soon it becomes 0 (it attains the new place as the basic position). How to make the reflective value to be fixed in the new position???
Really love this mate, very good explanation. Can you maybe tell me how you access and write to the different registers, to select modes for the different sensors in the chips?
Thanks anyways for the video, and you're good at explaining yourself in english, probs for that!
Thank you very much. I love you too. For the register reading, the library is facilitating it. The file MPU9250.h and MPU9250.cpp located github.com/bolderflight/MPU9250/blob/master/src/MPU9250.h uses registers List of registers www.invensense.com/wp-content/uploads/2017/11/RM-MPU-9250A-00-v1.6.pdf .
the main function(method) that makes the reading is in line 1004 in here github.com/bolderflight/MPU9250/blob/master/src/MPU9250.cpp
A very useful tutorial. one question how do I calibrate the sensor?
please check the library. there is a function for that.
@@robojax are you referring to int calibrateGyro()? if so, how do i use it? Do I just call it once in void setup or void loop?
Hi thank's for the very good video. I did some try but I get the compiling error for the line 27 MPU9250 IMU(Wire,0x68); as follows "Wire was not declared in this scope". The library is well included in the arduino directory. Can You help me to fix it? I am quite a beginner... Thank's in advance....
this is due to missing library. Please try to include it by clicking on Sketch->include library->Add zip library.
This can't be other error.
Thank You for the quick reply. With a freshest version of Arduino IDE all references work now fine.
You are welcome. I am glad it worked for you.
what range of numbers should we be getting?
for x, y and z you will get either positive or negative angle. it never stops at 360. I have provided the datasheet as well.
In which unit of distance are you using in accerelometer.
I have provided the datasheet. On page 6 it say g/sec is the unit . see it here www.invensense.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf
hi, Can you tell me MPU9250 using external interrupt : Raising or failing?
Thank you!!
I have not looked into it. I have provided the data sheet and you can see it.
@@robojax
Can you send me related documents?
snag.gy/EG4O2l.jpg