Homegrown allows for automation of a number of home and business accessories. HomeKit-enabled Home and Workgroup, such as locks and garage door openers, work as Homegrown devices automatically. Apple introduced the home, work, and guest HomeKit accessory identifiers (AHSI) in 2014, and they are used to identify a Home or Workgroup in HomeKit. The HomeKit accessory identifier is the unique name for each Home or Homegrown accessory. There are two key things to keep in mind when adding a HomeKit accessory with iCloud and HomeKit. The first thing is the AHSI of the home or home group. The Home or Homegrown AHSI is stored by the devices you own on an Apple ID within the device. That Apple ID identifier exists across all the devices you own. It is the only identifier that exists across all your devices. The first device from a parent device's collection must have the parent device's AHSI. The second device in a parent collection must have the other parent device's AHSI. Both parties must have the same AHSI. If you have a shared iPad or iPhone, the accessory is linked to the parent system. This means that even if the device you choose within your collections are also Apple products, they will still work with the HomeKit-enabled accessories as well. When using a third party accessory, the original iOS 8 iPad and iPhone models (with iOS 8 Home) use the AHSI of the parent device. An AHSI of any other iOS 8 devices is not unique and could get mixed-up between the devices you own or devices in your home and work collections. HomeKit-enabled accessories have an Apple ID that uses the parent AHSI. The HomeKit accessory identifier in this case uses the parent AHSI. Any additional information in the AHSI is not always necessary. However, it helps the system make smarter choices for HomeKit home accessories. The second thing to keep in mind when using a HomeKit accessory is that you must connect each device. In order for Apple's hardware system to detect the accessory and then control the device, you must connect the device directly to the HomeKit accessories via Wi-Fi. For details on how to connect a home kit, refer to the iOS 8 Homegrown documentation on the Apple website or the HomeKit Help & Support for iPad.