I would like to set the value of an item without trigger a rule… is this possible?
Yes, it depends on the trigger of the rule
changed trigger is self-explanatory
received update triggers every time an item is updated even if doesn’t change value
received command trigger when the item receives a command
Show me the rule and we may find a solution to your problem
I have an item that when changed from the BasicUI executes a rule. However, when that item is changed through a different source, I do not want the rule to execute.
The UIs send commands to Items. If you can have your mystery different source send updates, you can differentiate between them in a rule trigger as already explained.