Support changes affect Nest devices differently. Google ended support for first- and second-generation Nest Learning Thermostats on October 25, 2025, according to SlashGear. Hardware Premium reported that the thermostats still work from the device and keep existing schedules, while phone and Google Assistant controls no longer work. Separately, the unfr0zen project documents local-control options for thermostat generations 1–3, with different integrations and test status for each.
What still works on Nest devices
The reported changes vary by product. SlashGear said Google Home app support returned for the Nest x Yale lock in April 2026, including passcode management and real-time notifications. It also reported that the app added support for the first-generation Nest Doorbell, Nest Cam IQ Indoor and Nest Outdoor.
Production of Nest Mini and Nest Audio ended in June 2026, but SlashGear reported that software support would continue beyond the speakers’ original five-year support periods. A July 2026 firmware update improved their network traffic capabilities, according to the same report.
What unfr0zen documents for each thermostat generation
The unfr0zen project documentation describes USB patching for local control through MQTT, Matter over Wi-Fi or Thread, and Zigbee. Its maintainers distinguish the integrations by generation and mark first-generation support as untested on a physical thermostat.
| Nest Learning Thermostat generation | Integrations and project test status | USB connector |
| First | MQTT and Matter over Wi-Fi are built but not tested on a physical unit. Zigbee and Matter over Thread are not listed as available. | Mini-USB |
| Second | MQTT, Matter over Wi-Fi, Matter over Thread and Zigbee are marked tested; firmware 5.9.4-5 is listed. | Micro-USB |
| Third | MQTT, Matter over Wi-Fi, Matter over Thread and Zigbee are marked tested; firmware 5.9.4-5, 6.3-5, 6.4-8 and 6.5-14 are listed. | Micro-USB |
The project requires a computer and a data-capable USB cable; charge-only cables will not work. It advises making a full NAND backup before the first run and describes how to restore that backup. A failed run or bad patch could leave the thermostat unable to boot or control heating or cooling.
Back up the thermostat’s full NAND before a first run; a failed patch can interrupt heating or cooling control.
Radio limits and other firmware options
On second- and third-generation thermostats, Thread and Zigbee share a radio, so the project says they cannot both be active. On European models, either option replaces the wireless Heat Link connection.
No Longer Evil is a separate project. SlashGear reported that it redirects first- and second-generation thermostats’ network traffic to an alternate server, with a self-hosted option for technically capable users. The report describes its firmware as experimental and warns that a failed installation could brick the thermostat. Its approach and compatibility are distinct from unfr0zen’s local-control integrations.
