DIY smart-home fixes

The cheapest smart-home upgrades in 2026 are often old devices doing new jobs: Samsung is pushing caregiver tools, and Home Assistant users are repurposing spare phones and network gear. (news.samsung.com, home-assistant.io) Samsung’s SmartThings Family Care update, announced August 28, 2025, lets caregivers get activity notifications, medication and appointment reminders, and location-based alerts through TVs and home appliances as well as phones. The service is available in more than 200 countries, and Samsung says care recipients can choose what information to share and stop sharing at any time. (news.samsung.com) If no activity is detected for a set period, SmartThings can alert a caregiver when appliances such as a refrigerator or TV have not been used. Samsung also says a caregiver can respond by calling or by remotely activating a registered robot vacuum with a built-in camera to check the home. (news.samsung.com, howtogeek.com) A presence sensor is the part of a smart home that decides whether someone is home, in a room, or has gone inactive. Home Assistant’s mobile app can turn a phone into that signal source by creating a device tracker for location and adding sensors such as battery and network status. (home-assistant.io, companion.home-assistant.io) That is why old phones keep showing up in current smart-home advice: they already contain radios, batteries, microphones, cameras, and motion hardware. Home Assistant’s companion documentation says the app adds numerous sensors, and recent user guides show spare phones being reused as voice satellites, security cameras, and dashboard devices instead of buying dedicated hardware. (companion.home-assistant.io, xda-developers.com) The network layer is part of the same thriftier setup. Home Assistant’s UniFi integration supports presence detection, sensors, firmware updates, and even a button to power-cycle a Power over Ethernet port, which means one Ubiquiti console can double as both networking gear and an automation data source. (home-assistant.io) Ubiquiti has kept shipping updates that make that approach practical. Its firmware page lists UniFi Network Application 10.2.105 on March 31, 2026, Gateway 5.0.16 releases on April 6, 2026, and UniFi firmware 8.5.21 builds for several Wi‑Fi 7 access points between April 12 and April 16, 2026. (ui.com) Samsung is also expanding where these caregiver summaries appear. How-To Geek reported on April 16, 2026, that SmartThings “Now Brief” support for home security, pets, and Family Care is coming to Samsung TVs and refrigerators, with TV support tied to 2024-and-later sets and Family Hub refrigerators launched in 2021 and later. (howtogeek.com) The common thread is cost: instead of adding a new sensor to every problem, people are reusing the phone in a drawer, the router already in the rack, and the appliances already on the network. Samsung and Home Assistant are meeting that habit from opposite ends — one with packaged caregiver features, the other with tools that let users wire together what they already own. (news.samsung.com, companion.home-assistant.io, home-assistant.io)