Read RS232 send to KNX Group adress

[admin]

This should accept strings in X/r format where X is a number between 0 and 3:

Code:

char = port:read(1, 1)
if char then
  if char == 'r' then
    if #line == 2 and line:sub(2, 2) == '/' then
      value = tonumber(line:sub(1, 1))
      
      if value and value >= 0 and value <= 3 then
        grp.write('1/1/1', value)
      end
    end

    alert(line)
    line = ''
  else
    line = line .. char
  end
end