Google dropped support, this guy built a firmware you can flash to it to get it working locally with basically all of the features. Archive: https://archive.today/OmMZ6 From the post: >>This firmware loader uses the OMAP bootloader interface to flash custom bootloader and kernel images to Nest Thermostat devices. The device must be put into DFU mode to accept new firmware. Important: After flashing this firmware, your device will no longer contact Nest/Google servers. It will operate independently and connect to the NoLongerEvil platform instead, giving you complete control over your thermostat.