Read from the logic machine

[admin]

Here's the documentation on serial library:
http://openrb.com/docs/serial.htm

Here's a small example that will send back everything that LM reads from RS232 (default serial settings are 115200 8N1):

Code:

-- open port on first call
if not port then
  require('serial')
  port = serial.open('/dev/RS232')
  port:flush()
end

-- port ready
if port then
  -- read one byte
  char = port:read(1, 1)
  -- send back if read succeeded
  if char then
    port:write(char)
  end
end