Abstract: A thermostat method includes receiving temperature readings from a remote temperature sensor; operating a processor in a first mode and a second mode, where the processor uses more average power when operating in the second mode than when operating in the first mode; and repeatedly transitioning the processor between operating in the first mode and operating in the second mode. Transitions from operating in the first mode to operating the second mode are caused at least in part by an expiration of a first time interval. The thermostat receives one or more of the temperature readings from the remote temperature sensor while the processor is operating in the second mode. The method also includes adjusting a length of the first time interval based at least in part on an estimate of how fast the temperature readings from the remote temperature sensor are approaching a threshold.

Abstract: A thermostat method includes receiving temperature readings from a remote temperature sensor; operating a processor in a first mode and a second mode, where the processor uses more average power when operating in the second mode than when operating in the first mode; and repeatedly transitioning the processor between operating in the first mode and operating in the second mode. Transitions from operating in the first mode to operating the second mode are caused at least in part by an expiration of a first time interval. The thermostat receives one or more of the temperature readings from the remote temperature sensor while the processor is operating in the second mode. The method also includes adjusting a length of the first time interval based at least in part on an estimate of how fast the temperature readings from the remote temperature sensor are approaching a threshold.