RS232 serial read

[leonidas]

Hello,

I have a code which logs every char received be serial port:

Code:

if not port then
 require('serial')
 port = serial.open('/dev/RS232', { baudrate = 9600, parity = 'none', duplex = 'full' })
 port:flush()
end

-- port ready
if port then
  char = port:read(1, 1)
 if char then
   alert(char)
 end
end

What I need is to find specific string in received data. For example "OUT1ON" or "OUT1OFF" and based on it control KNX object. Maybe someone can help me with that?