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    • Creed ZagrzebskiCreed Zagrzebski
      Participant
      @czagrzebski
      2022-12-29 at 04:07
      Post count: 1
      #3715

      Hello,

      I ordered a STWI070WT-01 touch screen with the USB to UART Converter (v1.5) and I cannot figure out how to connect it to my Arduino Portenta H7. The Arduino is STM32 based and uses 3.3v digital logic rather than 5v. How can I use the adapter to communicate with the display over UART?

       

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    • Francesco FiaccabrinoFrancesco Fiaccabrino
      Participant
      @minimo55
      2022-12-30 at 03:17
      Post count: 19
      #3720

      To do H7 communicate with Stone display you need only four pins:

      +5V, GND, TX (pinJ1-33), RX (pin J1-35) but you cannot connect H7 directly to Stone display. H7 generates TTL signals, display uses RS232 signal. So there’s need of a RS232 to TTL converter. You can use this connections :

      see schematic.jpg

       

      terminals R1 IN (13), R1 OUT (12), T1 IN (11), T1 OUT (14) represent relative pins of MAX232 chip (see data sheet). Formly two channel of MAX 232 are used: channel R1 (sends D0 to RX ), channel T1 (sends TX to DI).

      MAX 232 chip translates TTL to RS232 and viceversa.

      It is desirable to use an external power supply to avoid overload of H7 supply.

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    • Gianroberto NegriGianroberto Negri
      Participant
      @gnrsoft
      2023-08-23 at 20:05
      Post count: 2
      #4356

      come collegare arduino portenta machine control con stone hmi?

    • maurodoimimaurodoimi
      Participant
      @maurodoimi
      2024-07-17 at 21:07
      Post count: 1
      #4732

      I need to use the Stone USB converter to connect a Arduino Portenta H7 to a Stone display 5v . Can you give me a schematic to do it ? Thanks

      • WuChaoWuChao
        Keymaster
        @wuchao
        2024-07-18 at 10:09
        Post count: 38
        #4735

        Hi dear Mauro,

        Please check the attached image. You can send email chao@stone-hmi.com or WhatsApp 008613260055123 directly to me for better supports.

        Best Regards,

        Chao

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