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Learning to find I2C addresses of sensors for Arduino Due

rahimmuh3

Hi! My name is Rahim M. and I am a full time Mechanical Engineering student at South Mountain Community College.

 

I am currently taking a Engineering Special Projects class involving ANSR and ASCEND for a weather balloon experiment.

 

My classmates and myself have chosen to use the Arduino Due microprocessor for our project because of its immense power and versatility as a processor, but just about everyone on our team is ignorant to the knowledge of how to program with Arduino, especially with I2C addresses.

 

If anyone out there can give us advice on how to begin finding and programming with I2C addresses for our Arduino Due, it would be very much appreciated.

 

I understand that finding I2C addresses is a rather complicated task, especially for beginners, but we really need the knowledge of how to do this in a simple manner as soon as possible.

 

I look forward to hearing from everyone!!!

 

Thank you.

 

Rahim M.

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  • 0

    Hi Rahim,

     

    The Wikipedia page for I2C explains that devices are either master or slave.

    The microcontroller on the Arduino Due is a master device usually. It doesn't have an I2C address. I2C addressing is for slave devices.

     

    The usual method is to see what integrated circuits (ICs) require I2C interfacing, and then the addresses can be found in the product datasheets for those ICs. You can just type the IC part number in google to get the datasheets.

     

    Does the Arduino Due have peripheral chips on-board that use I2C? I didn't think that was

    the case, but I'm not familiar with it.

     

    If you're interfacing an I2C device to the Arduino Due, then you need to check the datasheet of the device that you are interfacing.

Reply
  • 0

    Hi Rahim,

     

    The Wikipedia page for I2C explains that devices are either master or slave.

    The microcontroller on the Arduino Due is a master device usually. It doesn't have an I2C address. I2C addressing is for slave devices.

     

    The usual method is to see what integrated circuits (ICs) require I2C interfacing, and then the addresses can be found in the product datasheets for those ICs. You can just type the IC part number in google to get the datasheets.

     

    Does the Arduino Due have peripheral chips on-board that use I2C? I didn't think that was

    the case, but I'm not familiar with it.

     

    If you're interfacing an I2C device to the Arduino Due, then you need to check the datasheet of the device that you are interfacing.

Children
  • 0 in reply to shabaz

    Thank you for your advice shabaz! Well, myself being very inexperienced with Arduino programming and the hardware itself, I really do not know that much about on-board peripheral chips. Right now, the main issue for us is learning the process of Reading and Writing from our I2C senors to our Arduino Due microprocessor, of basically setting up the code for the sensors and microprocessor to communicate.


    Any advice on this would be greatly appreciated.


    Thank you.

     

    Rahim M.

  • 0 in reply to rahimmuh3

    Hi Rahim,

     

    Sorry for the delayed response (travelling), hopefully you have all the information you need now though from the other responses too.

    Personally I found the I2C specification (publicly available on the Internet) very useful to read, it provides details if you need to implement it from scratch. Ordinarily you don't need to do this, because you have something

    known as an application programming interface (API) so existing code or hardware does the detail of it for you.

    I2C is a very simple protocol, but is quite popular for interfacing basic devices/sensors, and the detail is useful to know for troubleshooting purposes too, even if you use an API.