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First arduino project, please help.

e14 Contributor

Ok, so i started a project utilizing arduinos (2x) (havent decided to go uno or mega yet)

 

My quesion is while using a tft screen and an adapter shield is there any way to expand the board?

I have ran out of pins. my project requires 15 output pins and 5 input pins(some analog and some digital) other than what are being used buy the tft screens.

 

is there anyway to make 2 or 3 arduino boards communicate with eachother instantly?

 

example: if arduino board(1) reads a digital signal into pin 5

              then arduino board(2) reads that arduino board(1) has recieved the signal so it sends a 5v output to a relay via pin 8?

 

I have yet to purchace my arduino boards, I would like some input about what would be the best way to do this.

 

Any help would be greatly appreciated, Thank You.

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  • Also wondering if i use the rx tx serial pins. if i have the touchscreen arduino send a certain integer if the other arduino can read that integer and perform an action.

     

    example:

    Touch arduino: Press button"1" on the screen. send a "1" through the tx pin

     

    Second arduino: Recieves the "1" and sends power to pin 8

     

    Touch arduino: Press button "2" on the screen. send a "2" through the tx pin

     

    Second arduino: Recieves the "2" and sends power to pin 10

     

     

    I understand that probably wont support any multi touch function. but im not really aiming for that. lol.

  • in reply to e14 Contributor

    Anthony

    You certainly can use serial to pass anything onto another Arduino, etc.

     

    There are a few examples of Serial using the computer which works equally as well for the 'far' end.

     

    Most data passed serially consists of a protocol where it starts with a character, contains x data bits, and then has a checksum, and a stop character.

    This is to ensure that only valid data is accepted and acted on.

     

    A vehicle is electrically very noisy so you will need to put some thought into some form of protocol or using an existing one.

     

    You may wish to use a small computer to do the graphics and accept inputs, and pass the data serially to an Arduino or two to do the physical interfacing.

     

     

    It looks like quite a challenge, especially for a begining project.

     

    Mark

  • in reply to mcb1

    thank you mark for your response.

     

    I have thought about using a small computer such as rasperry pi but the only problem i would have is the time it take to boot it up. and i wouldnot be able to start the vehicle until it boots up. 

    And i have also thought about how noisy the car will be. and i dont know if a simple debounce script would work but that was what i was going to try first

    Could you please give an example of something that should be passed serially? as in should it be a more complex integer or a character and an integer?.

     

    And it is gonna be quite a challege but that is what i am looking for. Something to challange what i already know and push me to learn more.

     

    im not new to coding at all i have coded quite a few flash games using both java and c++ but have never actually got into the hardware side of it all. and it has always intruiged by it.

     

    anthony

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  • in reply to mcb1

    thank you mark for your response.

     

    I have thought about using a small computer such as rasperry pi but the only problem i would have is the time it take to boot it up. and i wouldnot be able to start the vehicle until it boots up. 

    And i have also thought about how noisy the car will be. and i dont know if a simple debounce script would work but that was what i was going to try first

    Could you please give an example of something that should be passed serially? as in should it be a more complex integer or a character and an integer?.

     

    And it is gonna be quite a challege but that is what i am looking for. Something to challange what i already know and push me to learn more.

     

    im not new to coding at all i have coded quite a few flash games using both java and c++ but have never actually got into the hardware side of it all. and it has always intruiged by it.

     

    anthony

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