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  1. #1
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    Unable to read data from MAX232 Board

    What is the solution to read data from max232 board which is used to communicate between two control boards? I am using this max232 for communication between vending machine's control board and raspberry pi 3. I want to read the data that what exact command/data receive from the vending machines's control board?

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  2. #2
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    Re: Unable to read data from MAX232 Board

    Hi,

    read the vending machineīs datasheet.

    Klaus
    Please donīt contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  3. #3
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    Re: Unable to read data from MAX232 Board

    Quote Originally Posted by KlausST View Post
    Hi,

    read the vending machineīs datasheet.

    Klaus
    There is no such data in their datasheet that how will I read the MAX232 Board.
    When I tried to read through the converter cable then MAX232 has stopped working with the vending machine.



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  4. #4
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    Re: Unable to read data from MAX232 Board

    Hi,

    Are you aware that we donīt know which vending machine you are talking about, which "MAX232 board" you use, wich converter cable you use, what software you use, what port setup you use?

    How can we help?


    Klaus
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  5. #5
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    Re: Unable to read data from MAX232 Board

    This is my MAX232 Board
    Attachment 152603

    We are working on food vending machine

    This is my converter cable
    Attachment 152604

    We are using Android Studio Software for coding.

    Block diagram of our circuit

    Click image for larger version. 

Name:	Untitled Diagram.jpg 
Views:	3 
Size:	16.5 KB 
ID:	152605

    Thanks and Regards



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  6. #6
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    Re: Unable to read data from MAX232 Board

    Hi,

    you did not read any basic RS232 documentation yet? Then itīs time for it.

    --> usually UART communication needs
    * Rx connected to Tx and
    * Tx connected to Rx

    Check pin names and signal directions. Check where and how they need to be crossed.

    In your connection diagram the converter cable is missing.

    Klaus
    Please donīt contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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