raspberrypi_nodejs_projects/samples/lcd.js

const LCD = require('raspberrypi-liquid-crystal');

const lcd = new LCD(1, 0x27, 20, 4);

lcd.beginSync();

async function main(input) {
    function sleep(millis) {
        return new Promise(resolve => setTimeout(resolve, millis));
    }

    lcd.clearSync();
    lcd.printLineSync(0, input)
    await sleep(500);
    lcd.scrollDisplayRightSync()
    await sleep(500);
    lcd.scrollDisplayRightSync()
    await sleep(500);
    lcd.scrollDisplayRightSync()
    await sleep(500);
    lcd.scrollDisplayRightSync()
    await sleep(500);
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.scrollDisplayRightSync()
    lcd.printLine(0, '                    ')
}

async function runner() {
    await main('karl')
    await main('karl2')
}

runner()
// lcd.scrollDisplayLeftSync(3)