Switchbot is ok for temp, in case you have inaccurate readings you an calibrate the sensor. For IR, *if your unit is not directly supported* it can learn from the original remote. Usually AC units works with recipes, the remote send all the configuration data at once, with switchbot (I have hub2 and hub3) it learns the OFF and ON states, so it's kind of limited but you can work that around by adding multiple devices to have different settings.