I copied a very simple script and adjust it to my needs. It switched a light on when temerature was below 14 degrees. It worked. I changed the light to a blind and I received "attempt to call a nil value (field 'SwitchOff'". I changed switchoff() to close(), same result. I changed back to the light ...

It would be great if it was possible to trigger a device on a status or value of another device. e.g. Blinds closes when the sun sensor is above a specific value, bathroom fan activates when humidity reaches a certain level, spot on the driveway activates when PIR senses moving during the night, etc ...