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  • Serial connection Controllino with Raspberry Pi

     gerd2 updated 4 months, 3 weeks ago 2 Members · 3 Posts
  • gerd2

    Member
    March 11, 2021 at 2:02 pm

    Hi,

    I intend to connect me Controllino Maxi Automation with a Raspberry Pi 4 Computer using Serial2 or Serial3.

    Is it possible to connect the TX and RX Pins directly without demageing my Raspi, or do I have to use a logic level shifter (3,3V / 5V) in between?

    The Controllino is sourced with 24VDC and the Raspi with 5VDC.

    I´m not sure which max levels are allowed at the TX and RX Pins.

    Any advice would be very much appriciated!

  • mr-controllino

    Administrator
    March 11, 2021 at 2:22 pm

    Hello Gerd,

    It is always better to use proper Level shifters. They are available on very small boards … can even be implemented in a cable.

    regards
    Marco

  • gerd2

    Member
    March 11, 2021 at 2:27 pm

    Thanks for your quick response, Marco.

    I´ll make it with level shifting.

    Best regards

    Gerd

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