The Ecobee3 enables owners to use additional remote sensors to keep track of ambient temperature as well as detect motion in different locations within the home. With firmware version 18.104.22.1689, currently rolling out to the devices, owners can now access individual sensors directly from within the iOS HomeKit app.
The official change log for the firmware is as follows:
• Automatically Restore HomeKit Connection. Occasionally some ecobees could lose its connection to Homekit and have to be rebooted in order to re-establish the connection. This firmware update enables the ecobee to automatically reconnect without any user action.
• Wireless sensors with homekit enhancement. The wireless sensors now show up as accessories in the iOS Home app. Because of the dual functionality (occupancy detection and temperature sensing) of the sensors, each sensor will show up as two accessories.
• The usual background cleanup and stability. As always, to smooth things out for a better experience.
The Ecobee3 firmware is an automatic update currently being rolled out. Owners unsure of the version of their devices who aren't seeing their sensors in HomeKit should contact Ecobee support.