This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
This post is part of the Johnny Five series. See the first post here.
An LCD screen is a pretty cool component because we can use it for many different projects in creative ways.
This one I have is named 1602A.
It has 16 pins. I wired it in this way:
- Pin 1 goes to 0V
- Pin 2 goes to a potentiometer that controls the backlight
- Pin 3 is connected to 5V
- Pin 4 goes to Pin 7 on the Arduino
- Pin 5 goes to 0V
- Pin 6 goes to Pin 8 on the Arduino
- Pin 11 goes to Pin 9 on the Arduino
- Pin 12 goes to Pin 10 on the Arduino
- Pin 13 goes to Pin 11 on the Arduino
- Pin 14 goes to Pin 12 on the Arduino
- Pin 15 goes to 5V
- Pin 16 goes to 0V
The potentiometer has 3 pins. The middle one is connected to the LCD screen, the left one is 0V and the right one 5V:
That’s it for the wiring.
Create a new lcd.js file and load this code:
const { Board, LCD } = require("johnny-five")
const board = new Board()
board.on("ready", function () {})
Now initialize a new LCD object from the LCD class.
The exact initialization procedure depends on the kind of display used. In my case, it was this:
const lcd = new LCD({ pins: [7, 8, 9, 10, 11, 12] })
Finally, call the print() method to display a string:
const { Board, LCD } = require("johnny-five")
const board = new Board()
board.on("ready", function () {
const lcd = new LCD({ pins: [7, 8, 9, 10, 11, 12] })
lcd.print("Hello World!")
})
and run the program using node lcd.js to see it work:
The LCD class also offers those cool methods:
clear()to clear the screencursor()to position the cursor at a specific placeoff()to disable the displayon()to enable the displayblink()to blink the cursornoBlink()to un-blink the cursorautoscroll()to turn on automatic scrolling when the message goes too long
You can find out more on http://johnny-five.io/api/lcd/.
This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
flaviocopes.com | Sciencx (2021-04-28T05:00:00+00:00) Johnny Five, how to work with an LCD Screen. Retrieved from https://www.scien.cx/2021/04/28/johnny-five-how-to-work-with-an-lcd-screen/
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