Gas boiler engineer.... Ariston boiler

just moved into a new place which has an Ariston Genus boiler in an outdoor cupboard with a wireless controller in the house, but even after hours on youtube and google i cannot get either to set by timer. i can only switch on the heating manually which is a pain at night having to go outside to the back of house......
anyone out there, REGISTERED gas fitter please.
thinking maybe a more modern controller that works of the phone as well would be great. any help greatly appreciated....
Ciudad Quesada
Rob

If it’s the inbuilt programmer download the instructions on line they are all there if it is in built (optional extra ) might not be that simple to add another one ? If you go down a wireless remote system google the reviews on all of them before deciding a majority of my former colleagues reckon the hive is simplest but I wouldn’t have a clue