phpRPC + Ruby + Arduino = 远程控制

- 日理万妓 2022-07-15 08:07 174阅读 0赞

## phpRPC + Ruby + Arduino = 遠程控制LED開關(?) ##

嗯，我知道這是個很無聊的Sample :P  
關於phpRPC與Arduino請自行 Google  
觀看此demo之前請先安裝另外一篇所提到的 serialport 與另外一個 Gem 套件：phprpc  
  
在這個範例中，我透過PHPRPC建立一個Server，並且透過RPC呼叫一些method去控制USB Serial Port  
而在實現這個demo時，我們必須建立Server&Client兩端  
底下是Source code:

*複製內容到剪貼板*

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`# Server #!/usr/bin/env ruby require 'rubygems' require 'serialport' require 'phprpc' class Cloud   def initialize     @@sp ||= SerialPort.new("/dev/cu.usb serial-A600bMiv", {:baudrate => 9600})   end      def write(color)     @@sp.write("##{color}")   end      def close     @@sp.close   end    end def randomColor   r = rand(256).to_s(16)   g = rand(256).to_s(16)   b = rand(256).to_s(16)      r = "0" + r if r.size == 1   g = "0" + g if g.size == 1   b = "0" + b if b.size == 1      color = r+b+g   cloud = Cloud.new   cloud.write(color)   "Color #{color} has been set." end def setColor(color)   cloud = Cloud.new   cloud.write(color)      "Color #{color} has been set." end def setRGBColor(r,g,b)   cloud = Cloud.new   cloud.write((r+g+b).to_s)      "Color #{(r+g+b)} has been set." end methods = %w"randomColor setColor setRGBColor" server = PHPRPC::Server.new server.debug = true server.add(methods) server.start at_exit{   cloud.close }`

*複製內容到剪貼板*

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`# Client #!/usr/bin/env ruby require 'rubygems' require 'phprpc' rpc_url = "http://localhost:3000/" client = PHPRPC::Client.new(rpc_url) cmd = nil while cmd = gets.chomp   case cmd.downcase   when "on"     client.setColor("FFFFFF")     puts "LEDs On"   when "off"     client.setColor("000000")     puts "LEDs Off"   when "rand", "random"     puts client.randomColor   when "setcolor"     print "Please give me a color: "     color = gets.chomp     puts client.setColor(color)   when "setrgbcolor"     puts "Please give me the color red: "     red = gets.chomp     puts "Please give me the color green: "     green = gets.chomp     puts "Please give me the color blue: "     blue = gets.chomp     puts client.setRGBColor(red, green, blue)   when "exit"     exit   end end`

接著，運行Server的方式：

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> ruby server.rb mongrel

你可以安裝Mongrel也可以安裝Thin，但我想大家都有Mongrel可以用  
在啟動Mongrel若有發生錯誤，請在同目錄下建立一個叫做log的資料夾