🤖Have you ever tried Chat.M5Stack.com before asking??😎
    M5Stack Community
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Search
    • Register
    • Login

    UART Equal function always returns false

    UIFlow
    2
    3
    1.4k
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • H
      HWTaro9
      last edited by

      For context, I am trying to adapt a Marlin 3D printer smart screen by connecting it to M5Station Port.C1 and the UART response I am expecting (and that is being sent) is "M105". However when I compare the UART variable (which is the decoded UART response) to the code being sent "M105" it always returns false regardless.
      Here is the snippet of code if it helps to diagnose:
      uart1 = machine.UART(1, tx=14, rx=13)
      uart1.init(115200, bits=8, parity=None, stop=1)

      while True:
      if uart1.any():
      UART = str((uart1.readline()).decode())
      if UART == 'M105': #This erroneously returns false regardless
      pass
      wait_ms(2)

      1 Reply Last reply Reply Quote 0
      • felmueF
        felmue
        last edited by

        Hello @HWTaro9

        if I am not mistaken readline() returns the newline \n character at the end. This could be the reason for the comparison to return false.

        Thanks
        Felix

        GPIO translation table M5Stack / M5Core2
        Information about various M5Stack products.
        Code examples

        1 Reply Last reply Reply Quote 0
        • H
          HWTaro9
          last edited by

          Thank you for the reply, but I have already thought of that. the "decode" block removes everything other than the message (b'M105'\n -> M105)

          1 Reply Last reply Reply Quote 0
          • First post
            Last post