Port name issue

[admin]

If you only have a single USB converter you can use a function to find port name:

Code:

function findttyusb()
  for _, dev in ipairs(io.ls('/dev')) do
    if dev:find('ttyUSB') then
      return '/dev/' .. dev
    end
  end
end

tty = findttyusb()

if tty then
  require('serial')
  port = serial.open(tty)
end