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这个浇花系统计划加上LCD显示，比如当前湿度等等

使用Intel Edison以及Grove Starter Kit附带的RGB Backlight LCD来实现这个非常简单

打开：Sketchbook_Starter_Kit_V2.0-master\Grove_RGB_Backlight_LCD

发现里边有各种示例

以下是Hello World的示例

/*
  Hello World.ino
  2013 Copyright (c) Seeed Technology Inc.  All right reserved.

  Author:Loovee
  2013-9-18

  Grove - Serial LCD RGB Backlight demo.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include <Wire.h>
#include "rgb_lcd.h"

rgb_lcd lcd;

const int colorR = 0;
const int colorG = 0XFF;
const int colorB = 0;

void setup() 
{
    // set up the LCD's number of columns and rows:
    lcd.begin(16, 2);
    
    lcd.setRGB(colorR, colorG, colorB);
    
    // Print a message to the LCD.
    lcd.print("hello, world!");

    delay(1000);
}

void loop() 
{
    // set the cursor to column 0, line 1
    // (note: line 1 is the second row, since counting begins with 0):
    lcd.setCursor(0, 1);
    // print the number of seconds since reset:
    lcd.print(millis()/1000);

    delay(100);
}

/*********************************************************************************************************
  END FILE
*********************************************************************************************************/

除了显示以外，我们需要读取湿度传感器的数据

这个很简单，就是通过模拟口读回数值进行判断

可以用电位器模拟，代码如下：

// Demo for Grove - Starter Kit V2.0

// Prints the value of the potentiometer to the serial console.
// Connect the Grove - Rotary Angle Sensor to the socket marked A0
// Open the Serial Monitor in the Arduino IDE after uploading

// Define the pin to which the angle sensor is connected.
const int potentiometer = A0;

void setup()
{
    // Configure the serial communication line at 9600 baud (bits per second.)
    Serial.begin(9600);

    // Configure the angle sensor's pin for input.
    pinMode(potentiometer, INPUT);
}

void loop()
{
    // Read the value of the sensor and print it to the serial console.
    int value = analogRead(potentiometer);
    Serial.println(value);

    // Wait 0.1 seconds between readings.
    delay(100);
}