Pages: . Hello, I am new to the Forum, Arduino and Electronics in general, although for whatever reason my only "cum laude" while studying my degree was in electronics Having said that, I have to say that I find the Arduino concept really amazing and I took the jump to start trying to make my own projects. Specifically, the one I am working on right now is trying to develop a modal analysis kit, with at least four accelerometers, easy to transfer and plug to any computer, and be able to obtain structural dynamic response from simple hammer tests or even operational vibration.
I know now that it was not the best of the decissions, but once taken I have to make it work, even if it is only one accelerometer. I can access the accelerometer data via I2C, but when trying to get to it through SPI i get nothing, only -1,-1,-1 and not even the device ID. You also need to use the third argument to SPI. You should check the signal lines with an oscilloscope or logic analyzer if you have one to check to see if the lines are working. Thanks for the response. I tried the due extended approach too, but the result was the same.
So I decided to take a step back and try to do it with simple commands I do not have an oscilloscope or anything like that. Is there any other way I can monitor what signals are going through those lines?.
Maybe another arduino I have bought a nano to play with too, but do not have it yet. Maybe this gives somebody an extra clue on what might be going on: I have used succesfully a SD card module I bought.
So I guess that discards me using the wrong pins or in the wrong order. Any clue why this might be happening? Thanks a lot! I am using a Arduino Nano V3. Code: [Select]. The code does not make it work anymore. I get values but they don't change. I just tried using I2C and the sensor does not even initialize. I have a 3,3V and 5V arduino.
Vcc was on 3. My I2C code was working fine and everything was on 3. I will take a break and try with a logic analyzer an other day. I've been working on this for some months and I succeed connecting 2 ADXL over i2c, it's a shame to have only 2 adresses for that.
I thought it was only needed to change the CS between the sensors but as I see is more than that. I didn't understand the adresses change you said. The original adresses posted by rodiaIt works fine for me with one sensor.
For what is this adresse change? This thread could use the info on ICSP pin mapThis sensor uses I2C connection with the Arduino.
Like I said, this IMU is so popular, there are tons of documents and articles on the internet about it. In this post I will be mainly playing around with the accelerometer, and will cover other sensors on the GY80 later in another post.
I will be using the Arduino Uno as an example, it would be similar with other boards. You can either use 3. There are many people have been writing Arduino codes for this IMU, and there are even libraries available for these sensors. This is an example code how to use the ADXL library. It takes sensor measurements, calculate a human friendly value in this case roll and pitch values and output them to serial port.
ADXL345 Hookup Guide
Once we are getting data from this sensor, we can visualize it by using a 3D model. This is an example I have done. The program I used are written in Processing. Also when I turn it to certain point, the cube seems to go randomly to other directions.
It is important to take into account that when the pitch angle is 90 degree, the roll axis is aligned with the gravity vector, so the roll angle cannot be measured anymore. I was told those should be stored in the library folder that is in the same folder as your sketches.
Then, if there is an update to Arduino. Hi everyone. To do this i use a gy IMU. But i do not get any data from the sensor and I do not know what is the problem.
Please help me! What is the problem? Is my imu dead? Hello My accelerometer values are not changing… I dont know wat to do. Please do help me!!!!
Hi, I just started working with this sensor. If you are still havin trouble meybe I can help you, my skype is hiper, bye. Oscar bro i want to know that how do you give formula to pitch and roll in the code. Thanks in advance. Brotheri want to know that if three sensors are present. The arduino reads inputs from them depends on their address.
I am just learning, but think this code is asking for the ADXL It will also have a ADXL Make sure that these two files are in one ADXL folder thats in your library folder. If you get the same error again while compiling then your sketch still cant find the ADXL Be sure to restart your arduino programmer so the programmer knows you added something new to your library.Track My Order.
How to use GY80 Arduino – ADXL345 Accelerometer
Frequently Asked Questions. International Shipping Info. Send Email. Mon-Fri, 9am to 12pm and 1pm to 5pm U. Mountain Time:. Chat With Us. Digital output data is formatted as bit two's complement and is accessible through either an SPI 3- or 4-wire or I 2 C digital interface. This new version adds 2 standoff holes as well as an extra decoupling capacitor. The ADXL is a small, thin, low power, 3-a….
First, let's get some background on this small yet powerful accelerometer. ADXL Datasheet. Some additional resources that might be helpful in this process, especially if you are just started out, you can find here:. What are those last three?! Yes, the ADXL has special sensing abilities! The single and double tap sensing detects when a single, or two simultaneous, acceleration events occur.
Activity and inactivity sensing detect the presence or lack of motion. Free-fall sensing compares the acceleration on all axes with the threshold value to know if the device is falling. These functions can also be mapped to one of two interrupt output pins. An integrated, patent pending level first in, first out FIFO buffer can be used to store data to minimize host processor intervention. The ADXL is well suited to measure the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock.
Furthermore, low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation. In both cases, the ADXL operates as a slave device.Track My Order. Frequently Asked Questions. International Shipping Info. Send Email. Mon-Fri, 9am to 12pm and 1pm to 5pm U. Mountain Time:. Chat With Us. Digital output data is formatted as bit two's complement and is accessible through either an SPI 3- or 4-wire or I 2 C digital interface.
This new version adds 2 standoff holes as well as an extra decoupling capacitor. The ADXL is a small, thin, low power, 3-a…. First, let's get some background on this small yet powerful accelerometer. ADXL Datasheet.
Some additional resources that might be helpful in this process, especially if you are just started out, you can find here:. Need Help? Mountain Time: Chat With Us. Shopping Cart 0 items. Product Menu. Today's Deals Desktop Site Education.
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Favorited Favorite A quick introduction to accelerometers, how they work, and why they're used. An introduction to I2C, one of the main embedded communications protocols in use today. Comments 11 Single Page Print. Your Account Log In Register.We all know about accelerometer and gyroscope, they are primarily used to detect acceleration. While Accelerometer can measure linear acceleration, the gyroscope can help find the rotational acceleration. Here we are discussing about ADXL Accelerometer which is used to measure the acceleration or change in velocity in x, y, and z-axis.
These small sensors are used in cars and bikes to detect accidents to deploy the airbags and are also used in mobile phones for a variety of applications like compass and location tracking.
We used the accelerometer to build various useful applications which you can check at below links:. You can see all the accelerometer-based projects here. There are many types of MEMS accelerometer sensors available in the market.
They can be classified on the basis of precision, power consumption, and interfacing. All these sensors are portable and can be fitted in any kind of device like wearables. These sensors measure acceleration in 3-axis x,y,z. Among the above three, ADXL is easy to interface because of its digital nature.
ADXL can measure static and dynamic accelerations and suitable for mobile applications. Similarly, search for Adafruit Unified sensor and install. Now, we are ready to write the code. First, include all the required libraries header files to support the functionality of the sensor. Here we are also using wire library for I2C communication.
Make an instance by using any variable like accel to use the various functions of the ADXL Arduino library. In void setup function, initialize serial communication to print data on a serial monitor using Serial. Now, check whether the valid ADXL sensor is connected or not. We will check the result returned by accel. Now, print the values of acceleration in x,y, z-axis using event.
Complete code with a Demonstration video is given at the end of this article. Then open Serial monitor and you will see acceleration readings in x, y, z-axis as shown below. So this is how an Accelerometer can be used with Arduino UNO to detect the variations in x, y, and z-axis. Recommended Posts.
Didn't Make it to embedded world ? No problem! Fundamentals of IoT Security. From Nano-power to Light Speed. Raspberry Pi Connect. Get Our Weekly Newsletter! Helena St. Related Content. Coin Sorting Machine using Arduino.Out of the box, the [[ADXL]] is an [[I2C]] 3-[[axis]] accelerometer with user selectable sensitivity and bit resolution depending on sensitivity.
And… It is pretty decent all around, but were not really going to spend much time talking about boring stuff today. Today, we are talking about getting the special features of the ADXL up and running. These special detection features have the ability to trigger 2 interrupt pins, making the pin go HIGH the moment one of the events is sensed.
You can select what events to watch for, and what interupt pin to trigger when it is sensed I had issues with INT2, it would not reset.Hand Gesture Controlled wheelchair using Arduino & adxl345 (Tutorial : 91 in हिंदी )
You can take these interrupt pins and connect them to your Arduino to trigger an interrupt. An interrupt, when sensed on the Arduino, pauses the system instantly, even if it is in the middle of something, and responds to that interrupt how ever you have it setup before returning to the normal code. Like a police officer coming down the street with its lights on… Even if you have a green light, you stop and let them go. But using interrupts is a little beyond the scope of this article, so we are going to just keep checking for these actions in code and respond to them when we see them.
We connect CS to 3. All this example code will do for you now is output the name of the triggered action in the serial terminal. But I left the code in a state that should be pretty obvious how to extend it.
The special features require a lot of setup to get them working, but because this is bildr, we are going to start you off with working code, everything all setup, and spend a little bit explaining why certain things are how they are.
To simplify everything in code, we will be using this Arduino library. But I have made a few small changes to it to make this a little easier to do, and to make it work a little better with other libraries, so the new library files are included in the code below.
The parameters that are set in the code should get you going, but you will most likely find that your project requires something different. You can also completely turn off actions.
I found that it was hard to trigger tap without triggering action, and double tap most often triggered tap as well. If you are up for it, the documentation on this chip is quite good, and explains a lot of the values in much greater detail PDF. Im sure you could come up with ways to expand on this, but incase you need some help, here we go: What about a tap dance sensitive floor that caused lights to change with the rhythm of the dance? Something as simple as a ball that you throw up and only lights up on its way down… Anything you could think of that needs or could incorporate in activity, free-fall, or taps, you could find a way to use this to make it happen.
If you think you would like to help bildr by writing something, supplying code or schematic, or just have an idea for an article you think should be written, please contact us at blog bildr. Tap, Tap, Drop.It can measure the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration. ADXL is 3v3 compatible device, it's powered by a 3. It has three outputs for each axis i.
These are analog outputs and thus require an ADC in a micro-controller. Arduino solves this problem. We will be using the analog functions of Arduino. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. We will be displaying two different values for one analog value read. The first value is the ADC converted value in bit resolution 0 to while the second one is mapped for PWM and it is in 8-bit resolution 0 to Question 1 year ago on Step 4.
Question 1 year ago. Hello, is there a reason you are mapping the 10bit analog input to an 8 bit value 0 ?
How to Use ADXL345 Accelerometer with Arduino
What can I use the converted value for that is not possible with the 10 but value? I am really need to this and dont understand why the conversion is made and over all how to use it in other projects as well.
Please help me. I am using ArduinoDroud to write the above given code but it shows error when I vompile it. Can u please help me out. I am doing a project which involves using the speed of a motor so how do I find the acceleration of the motor using ADXL Reply 3 years ago. Hey, You'll have to refer the datasheet for MPU sensor.