Module: AgriController::MA

Defined in:
lib/agri-controller/device/ma.rb

Class Method Summary collapse

Class Method Details

.check_sum(str) ⇒ Object

check_sum(“u0002P02EB3D”) # =>“3D” check_sum(“u0002P02EB”) # =>“3D”



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# File 'lib/agri-controller/device/ma.rb', line 21

def check_sum(str)
    x=str.chomp
    #sum=x[-2..-1]
    #p str[1]
    int1=str[1].ord
    int2=str[2..3].to_i(16)
    int3=str[4..5].to_i(16)
    check_sum=(int1+int2+int3).to_s(16)
    
    if check_sum.size<=1
      check_sum="0"+check_sum
    elsif  check_sum.size>2
      check_sum=check_sum.slice(-2,2)
    end
    #p check_sum.upcase
    return check_sum.upcase
end

.check_sum?(str, sum = ) ⇒ Boolean

check_sum?(“u0002P02EB3D”) # =>true check_sum?(“u0002P02EB”,“3D”) # =>true check_sum?(“u0002P02EB”,“0F”) # =>false check_sum?(“bad”) # =>nil

Returns:

  • (Boolean) 


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# File 'lib/agri-controller/device/ma.rb', line 43

def check_sum?(str,sum=str[-2..-1])
  begin
    res        =check_sum(str)
    return res== sum
  rescue
    return nil
  end
end

.parse(str) ⇒ Object

parce(“x02P02EB3Drx02B120C60rx02n4E530Frn”) # =>“Celsius Degree”=>15.600000000000023



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# File 'lib/agri-controller/device/ma.rb', line 53

def parse(str)

  hash={}
  
  begin
    list=str.chomp.split("\r")
    list.each do |x|
      if check_sum?(x)
        if x[1]=="P"
          a=x.slice(2,4).to_i(16)
            hash["ppm"]=a
            
        elsif x[1]=="B"
           a=x.slice(2,4).to_i(16)
           hash["Celsius Degree"]=a/16.0-273.15
            
        elsif x[1]=="A"
           a=x.slice(2,4).to_i(16)/100.0
            hash["humidity"]=a
        end
      else
        return nil
      end
    end
  rescue
    return nil
  end
  return hash
end

.sample ⇒ Object

“u0002P02EB3Dru0002B120C60ru0002n4E530Frn”



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# File 'lib/agri-controller/device/ma.rb', line 5

def sample
  samples[0]
end

.samples ⇒ Object

5 samples in Array



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# File 'lib/agri-controller/device/ma.rb', line 10

def samples
  ["\u0002P02EB3D\r\u0002B120C60\r\u0002n4E530F\r\n",
   "\u0002n4E5915\r\u0002P02E83A\r\u0002B120B5F\r\n",
   "\u0002n4E4C08\r\u0002P02F042\r\u0002B12075B\r",
   "nonono!\rbadchar!",
   nil]
  #ppms=[747,744,752]
end