在節點Js和Arduino上使用Johnny Five的LCD庫

Question

我想讓我的液晶顯示屏將其關閉背光燈並再次打開。

打開它的命令：lcd.noBacklight();工作正常，但我不知道如何再次打開它。

var five = require("johnny-five"); 
var board = new five.Board(); 

board.on("ready", function() { 

    var lcd = new five.LCD({ 
    controller: "PCF8574T" 
    }); 

    lcd.cursor(0, 0).print("1 Hello Teste"); 
    lcd.cursor(1, 0).print("2 Hello Teste"); 
    lcd.cursor(2, 0).print("3 Hello Teste"); 
    lcd.cursor(3, 0).print("4 Hello Teste"); 

    lcd.noBacklight(); 

    setTimeout(() => { 
    lcd.yesBacklight(); //Here I don't know what to do 
    }, 1500); 

    setInterval(() => { 
    lcd.noBacklight(); 
    }, 1500); 


}); 

我怎麼能再打開它？

Answer 1

好的，解決了，只是把lcd.backlight();置於小寫。

var five = require("johnny-five"); 
var board = new five.Board(); 

board.on("ready", function() { 
    var i = 0; 
    var lcd = new five.LCD({ 
    controller: "PCF8574T" 
    }); 

    lcd.cursor(0, 0).print("1 Hello Teste"); 
    lcd.cursor(1, 0).print("2 Hello Teste"); 
    lcd.cursor(2, 0).print("3 Hello Teste"); 
    lcd.cursor(3, 0).print("4 Hello Teste"); 

    setInterval(() => { 
    lcd.clear(); 
    lcd.noBacklight(); 
    lcd.cursor(0, 0).print(i + " Hello Teste"); 
    i++; 
    lcd.backlight(); 
    }, 1500); 


});