lua table

[admin]

You can check like this:

Code:

if knx_cfg['3'] and knx_cfg['3'].dim_ then
  log( knx_cfg[3].dim_)
end

Or a more strict check:

Code:

if type(knx_cfg['3']) == 'table' and knx_cfg['3'].dim_ then
  log( knx_cfg[3].dim_)
end