Start by connecting them to the heat pump.
Then place the accessory on a wall about 1.20 cm up from the floor, not in direct sunlight. Except for the Repeater RPP 10, which must be plugged into a wall socket, of course.
All accessories work without myUplink. But if you want to be able to monitor the indoor climate from your mobile phone, you need to connect the heat pump to myUplink. And if you want to be able to control it, you need a myUplink Premium subscription.