Here obdexpress.co.uk shares a simple method to convert LT20 smart key with Lonsdor K518 Pro Key Programmer- by detecting original key.
Menu function path:
Special functions>> Key settings>> LT smart key>> Convert smart key type
Operation:
Open the card slot's baffle on K518 Pro
Put the Lonsdor LT20 smart remote into the card slot
Select "By identifying working key"
Remove the LT20 smart key, and put the original key into the card slot
Identify the current frequency successfully. It's 433.58/434.42MHz.
Select the frequency type the same as the original
And select the button type the same as the working key
Identify the working key successfully
Put the Lonsdor LT20 into the card slot of K518 Pro Key Programmer
Wait a moment until the generation is successful.
Note:
If the key has remote but not smart function after programming, please go to [Modify frequency] function menu to change.