Continuous loop reading data

app/helpers/InSyncState.rb

@@ -12,23 +12,21 @@ class InSyncState < StatePattern::State
 
     while (idx+sync_pattern_length < bytes.length && !new_frame_starts(bytes,idx,sync_pattern_length)) do
       frame = frame + bytes[idx]
-      idx = idx +1
+      idx = idx +1     
-      
     end
         
     # did we reach the end of the frame?
     if new_frame_starts(bytes,idx,sync_pattern_length)
-      p "------ FRAME -----"
       frame_lines = frame.split("\n")
-      p frame_lines 
+      p "------ FRAME -----"
-      p "##################"
+      # p frame_lines 
+      # p "##################"
       reading = handle_frame(frame_lines)
       p reading 
       return bytes[idx+sync_pattern_length..-1]
     else
-      return nil      
+      return bytes     
     end
-
   end
   
   private

smartmeter.rb

@@ -4,6 +4,8 @@ require "active_record"
 require "serialport"
 require "state_pattern"
 
+MAX_BYTES = 100
+
 project_root = File.dirname(File.absolute_path(__FILE__))
 Dir.glob(project_root + "/app/models/*.rb").each{|f| require f}
 Dir.glob(project_root + "/app/helpers/*.rb").each{|f| require f}
@@ -11,28 +13,34 @@ Dir.glob(project_root + "/app/helpers/*.rb").each{|f| require f}
 connection_details = YAML::load(File.open('config/database.yml'))
 ActiveRecord::Base.establish_connection(connection_details)
 
-if __FILE__ == $0
+def open_device
   begin
     # Open connection to serial port
-    ser = SerialPort.new("/dev/ttyUSB1", 9600, 7, 1, SerialPort::EVEN)
+    io_device = SerialPort.new("/dev/ttyUSB1", 9600, 7, 1, SerialPort::EVEN)
-    lines = ""
-    for i in 0..21
-      lines = lines+ser.readline("\n").gsub(/\r/, '')
-    end
   rescue 
     p "Serialport Error - reverting to 'example_blurp.txt'"
-    lines = File.read("example_blurp.txt")[rand(1500)..-1]
+    io_device = File.open("example_blurp.txt")
-    p "There are #{lines.length} characters"
+  end 
-    p lines
+  return io_device
-  end  
+end
 
+def read_from(source)
+  source.read(MAX_BYTES).gsub(/\r/, '') rescue ""
+end
+
+if __FILE__ == $0
+  source = open_device
+  buffer = []
+  buffer = read_from(source)
+  
   #
   # Process the received lines
   #
   sync = Synchronizer.new
-  while (!lines.nil? && lines.length > 0)
+  while (buffer && buffer.length > 0)
-    lines = sync.handle_byte_stream(lines)
+    p "BUFFER: #{buffer}."
-    #p lines
+    buffer = sync.handle_byte_stream(buffer)
+    buffer = buffer + read_from(source)
   end
 end
 #p sync