Navigation

    M5Stack Community

    • Register
    • Login
    • Search
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Search
    1. Home
    2. Skulblaka
    • Continue chat with Skulblaka
    • Start new chat with Skulblaka
    • Flag Profile
    • Profile
    • Following
    • Followers
    • Blocks
    • Topics
    • Posts
    • Best
    • Groups
    Save
    Saving

    Skulblaka

    @Skulblaka

    0
    Reputation
    1
    Posts
    221
    Profile views
    0
    Followers
    0
    Following
    Joined Last Online
    Website twitter.com/SkulblakaCH Location Switzerland Age 25

    Skulblaka Follow

    Posts made by Skulblaka

    • QR Code positioning on M5Paper e-ink display

      Hi everyone

      I'm having problem with positioning a QR code on my M5Paper e-ink screen.

      Given this very simple piece of Arduino code:

      #include <M5EPD.h>
      
      M5EPD_Canvas canvas(&M5.EPD);
      const uint16_t Y = 0;
      
      void setup()
      {
          M5.begin(false, false, false, false, false);
          M5.EPD.SetRotation(90);
          M5.EPD.Clear(true);
      
          canvas.createCanvas(540, 960);
          canvas.qrcode("https://www.example.org/", 70, Y, 400);
          canvas.pushCanvas(0, 0, UPDATE_MODE_GC16);
      }
      
      void loop()
      {
      }
      

      When setting Y to 0, the qr code gets placed at the very top of the screen, as expected:

      0_1633645361031_threema-20211008-002054235.jpg

      When setting Y to 560 (screen height 960 - size of qr code 400), I would expect the QR code to render at the very bottom of the screen. However, the qr code gets render barely a bit lower than with Y = 0.

      0_1633645516293_threema-20211008-002054788.jpg

      Is there something obvious I'm missing?
      Any help would be much appreciated.

      posted in Arduino
      Skulblaka