Grove LCD and NodeJS about grovepi HOT 7 CLOSED

const GrovePi = require('node-grovepi').GrovePi;
const fs = require('fs');
const sleep = require('sleep');
const extend = require('extend');

const I2cSensor = GrovePi.sensors.base.I2C;
const i2cBus = require('i2c-bus');

const DISPLAY_RGB_ADDR = 0x62;
const DISPLAY_TEXT_ADDR = 0x3e;

const i2c0Path  = '/dev/i2c-0'
const i2c1Path  = '/dev/i2c-1'
const i2c2Path  = '/dev/i2c-2'

class LCD_I2C {
    constructor(){
        this.data = {}

        this.initialized = false;
        this.bus = null;
        // Bus Address from i2cdetect command
        this.address = 0x68;
        // Default delay for streaming
        this.watchDelay = 100;

        let busNumber

        if (fs.existsSync(i2c0Path)) {
          busNumber = 0
        } else if (fs.existsSync(i2c1Path)) {
          busNumber = 1
        } else if (fs.existsSync(i2c2Path)) {
          busNumber = 2
        } else {
          var err = console.log('ERR: Could not determine your i2c device')
        }

        this.i2c1 = i2cBus.openSync(1);
        console.log(this.i2c1)

        this.setText('Ready!');
        this.setRGB(55, 55, 255);
    }

    //data
    setData(data) {
        this.data = Object.assign({}, this.data, data)
        this.update(this.data)
    }

    update(data) {
        var text = ""
        Object.keys(data).map((k) => {
            text = text + ` ${k}: ${data[k]}`
        })
        this.setText(text);
    }

    //Hardware
    setRGB(r, g, b) {
      this.i2c1.writeByteSync(DISPLAY_RGB_ADDR,0,0)
      this.i2c1.writeByteSync(DISPLAY_RGB_ADDR,1,0)
      this.i2c1.writeByteSync(DISPLAY_RGB_ADDR,0x08,0xaa)
      this.i2c1.writeByteSync(DISPLAY_RGB_ADDR,4,r)
      this.i2c1.writeByteSync(DISPLAY_RGB_ADDR,3,g)
      this.i2c1.writeByteSync(DISPLAY_RGB_ADDR,2,b)
    }

    textCommand(cmd) {
      this.i2c1.writeByteSync(DISPLAY_TEXT_ADDR, 0x80, cmd);
    }

    setText(text) {
      this.textCommand(0x01) // clear display
      sleep.usleep(50000);
      this.textCommand(0x08 | 0x04) // display on, no cursor
      this.textCommand(0x28) // 2 lines
      sleep.usleep(50000);

      var count = 0;
      var row = 0;
      for(var i = 0, len = text.length; i < len; i++) {
        if(text[i] === '\n' || count === 16) {
          count = 0;
          row ++;
            if(row === 2)
              break;
          this.textCommand(0xc0)
          if(text[i] === '\n')
            continue;
        }
        count++;
        this.i2c1.writeByteSync(DISPLAY_TEXT_ADDR, 0x40, text[i].charCodeAt(0));
      }
    }
}

export default LCD_I2C