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  • Thank you so much for the responses! I am just now back at a computer to post this.
    I just realized that these are 5v. I have two of the same screens and backpacks.

    I have checked the connection many time, and I just tried flipping the pins.

    Here is my code.

    var i2c = new I2C();
    I2C1.setup({scl:D28, sda:D29});
    var lcd = require("HD44780").connectI2C(I2C1);
    lcd.print("Hello World!");

    I have tried with and without "var i2c = new I2C();"

    When I run: getPinMode(pin) I get "input_pullup" for both pins. That doesn't seem right


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