Personally, when I was looking into this earlier this year, I decided not to go with an IOT-connected smoke detector. They'll be installed for 10 years and I don't want IOT involved in a safety system. I did want to have an IOT-connected way to know if the smoke detector went off. That's why I used the Ecolink FireFighter (which is a device that listens for a smoke or CO alarm). There is a Z-Wave and Zigbee version of that device.
