Grove LCD RGB API for Node.js
npm install grove-lcd-rgbgrove-lcd-rgbThis a port of Arduino library for Grove LCD RGB display with some additional functions. It follows Node.js' non-blocking semantics and targets Raspberry Pi.
Enable I2C using raspi-config or by uncommenting/adding dtparam=i2c_arm=on to /boot/config.txt
Install library using:
npm install --save grove-lcd-rgb
See Wiring for wiring details.
constructor({ characterSize, lines })
Creates an instance of GroveLCDRGB by trying to open a I2C device with address 0x3e on bus /dev/i2c-{0-2}. Throws an Error if a bus was not found.
* characterSize
Sizes of a character in pixels. Defaults to: CharacterSize._5x8. See CharacterSize.
* lines
Number of lines a screen has. Defaults to: Lines.Two. See Lines.
on()
Turn the display on.
off()
Turn the display off.
clear()
Clear text from the display.
blinkOn()
Turn the cursor blinking on.
blinkOff()
Turn the cursor blinking off.
cursorOn()
Turn the cursor on.
cursorOff()
Turn the cursor off.
cursorLeft()
Move cursor left.
cursorRight()
Move cursor right.
home()
Set the location at which subsequent written text will be displayed to column 0, row 0.
setCursor(col, row)
Set the location at which subsequent written text will be displayed.
* col the column at which to position the cursor
* row the row at which to position the cursor
autoscrollOn()
autoscrollOff()
scrollLeft()
scrollRight()
leftToRight()
Flow text from left to right. Default mode.
rightToLeft()
Flow text from right to left
blinkLEDOn(ratio)
Control the backlight LED blinking.
* ratio Blink ratio. On time in 1/256 of a second. Defaults to: 0x7f, half a second.
blinkLEDOff()
Turn off backlight LED blinking.
createChar(location, charmap)
setRGB(red, green, blue)
Set backlight LED to specified color.
* red Red component.
* green Green component.
* blue Blue component.
setPWM(color, pwm)
setTextRaw(text)
Print text to the display without any additional formatting.
* text Text to print.
setText(text)
_5x8 default for GroveLCDRGB constructors.
_5x10
Blue
Green
Red
One
Two default for GroveLCDRGB constructors.
LCD | Raspberry Pi
--- | ---
GND | Any GND (e.g. pin 6)
VCC | Any 5V (e.g. pin 4)
SDA | SDA (pin 3)
SDL | SLD (pin 5)
The LCD (at least v4.0) works correctly when wired to Raspberry Pi GPIO pins directly without a level-shifter.
* Adapt to work on other devices.
MIT