Hello
I thank you for this answer I will try, I think your explanation will be enough for it to work
Thank you again for your help

Hello everyone
I start in the LUA coding, I have a contact to which I try a code it is to display a text in a virtual device, I simply copied the following code:

- Lighting Entry Light.
commandArray = {}
if (devicechanged ['tank']) then
commandArray [ 'tank'] = 'On'
print ('Ignition')
http: //192 ...